megalomania
October 7th, 2002, 03:19 PM
-CossaC-
Frequent Poster
Posts: 54
From:
Registered: DEC 2000
posted February 04, 2001 10:06 PM
--------------------------------------------------------------------------------
Does anyone have any ideas for a really basic timer?, I want one that dosen't cost me heaps(cos its gonna get blown up), and is easy to make/aquire.
~Ço§§aÇ~
ALENGOSVIG1
Moderator
Posts: 766
From: Vancouver, Canada
Registered: NOV 2000
posted February 04, 2001 10:36 PM
--------------------------------------------------------------------------------
<img src="http://www.angelfire.com/mb2/alspalace/timer.gif" alt=" - " />
J
Moderator
Posts: 602
From: United Kingdom
Registered: SEP 2000
posted February 05, 2001 08:11 AM
--------------------------------------------------------------------------------
Personally I wouldn't trust a simple timer like this with my life. This isn't to say it won't work (it will), but things like dead batteries, magnetic interference, a faulty wire/dry joint could cause it to malfunction. Test each constructed circuit thoroughly before use!
I can't remember the exact spec of the 555, but some digital circuits don't output 0v at logic level 0. The level might be as much as a couple of volts, maybe enough to trigger your relay. I'd want to view the output with a CRO to be sure.
J
------------------
"If the aquarium water has to be drunk don't waste the fish. In fact they'll probably be the easiest to eat even if you don't need the water. The cat is next in the pot." - John 'Lofty' Wiseman
ALENGOSVIG1
Moderator
Posts: 766
From: Vancouver, Canada
Registered: NOV 2000
posted February 05, 2001 03:30 PM
--------------------------------------------------------------------------------
Oh ya, there a store in my area called princess auto, it sells microwave timers cheap. U can also get ammo cans for a few bucks, and ammo cans for Missiles..
------------------
Explosives Archive
10fingers
Frequent Poster
Posts: 411
From: USA
Registered: SEP 2000
posted February 05, 2001 03:45 PM
--------------------------------------------------------------------------------
You can buy a cooking timer for $5.00 at Wal-Mart. I think they are one hour. I would not trust a timer of the type shown above, too many things to go wrong.
Another safety precaution I would take is to have the timer ignite a fuse to the detonator instead of having it go directly to the detonator. This way if your timer malfunctions it will light the fuse which will give you a few seconds to react.
-CossaC-
Frequent Poster
Posts: 54
From:
Registered: DEC 2000
posted February 05, 2001 04:11 PM
--------------------------------------------------------------------------------
Yeah the problem with having a fuse there is that it leaves one more thing to go wrong, and no body likes goin to have a look at it, when it has failed to go off.
~Ço§§aÇ~
CragHack
Frequent Poster
Posts: 606
From:
Registered: DEC 2000
posted February 05, 2001 04:15 PM
--------------------------------------------------------------------------------
yeah i would suggest the timer going roght to the detonator. like he said just one more thing to go wrong. i hate checking liitle fire crackers when they don't light let alone something bigger.
------------------
...Ĉ
10fingers
Frequent Poster
Posts: 411
From: USA
Registered: SEP 2000
posted February 05, 2001 06:34 PM
--------------------------------------------------------------------------------
If your timer fails are you going to wanna go look at it?
ALENGOSVIG1
Moderator
Posts: 766
From: Vancouver, Canada
Registered: NOV 2000
posted February 05, 2001 06:39 PM
--------------------------------------------------------------------------------
nope, just shoot at it for awhile.
sealsix6
Frequent Poster
Posts: 154
From: NYC,NYC,USA
Registered: NOV 2000
posted February 05, 2001 06:50 PM
--------------------------------------------------------------------------------
I have a question does anyone know a site where i can find eletrical explanations for like basic eloctroncis because I have no clue about the schematics (such as the one above) and I would like to learn more about them such as what the syombols mean and how to build stuff using the schematics
Metal
Frequent Poster
Posts: 137
From: I'm everywhere.
Registered: NOV 2000
posted February 05, 2001 07:20 PM
--------------------------------------------------------------------------------
You can find some stuff here:
<a href="http://www.epanorama.net/basics.html" target="_blank">http://www.epanorama.net/basics.html</a>
------------------
"I'm not a slave to a god that doesn't exist. I'm not a slave to world
that doesn't give a shit" - Marilyn Manson
-CossaC-
Frequent Poster
Posts: 54
From:
Registered: DEC 2000
posted February 06, 2001 04:29 PM
--------------------------------------------------------------------------------
Well if I use the timer to detonate a large amount of SP for example, i sure as hell don't wanna leave it out waiting to get rained on.
~Ço§§aÇ~
Jumala
Frequent Poster
Posts: 199
From: Germany
Registered: OCT 2000
posted February 06, 2001 08:06 PM
--------------------------------------------------------------------------------
Hello all,
I have seen the NE555 timer and can only warn you all. The 555 timer can only produce a on-impulse of a length defined by the RC line.
What here is needed is at first a delay of a defined length and then a on-impulse to set something off. A 555 timer cannot do this job at a satisfactory way and it has no safety in handling.
The MOS 4541 circuit is a programmable binary counter with own RC oscillator.
You can simple calculate the oscillators frequency and set the delay time with two jumpers. In my timer I have build in two watcher functions to control the timers and the switching transistors condition.
All parts shouldn´t cost much more than 5 bucks and some work to solder them together.
I haven´t build a homepage so I cannot post the plan. Perhaps can somebody put the plan at his homepage?
ALENGOSVIG1
Moderator
Posts: 766
From: Vancouver, Canada
Registered: NOV 2000
posted February 06, 2001 10:04 PM
--------------------------------------------------------------------------------
i can post it on my website. E-mial me at alengosvig@yahoo.com and i will upload them.
blackadder
Frequent Poster
Posts: 313
From: London
Registered: DEC 2000
posted February 07, 2001 01:40 PM
--------------------------------------------------------------------------------
All I would do is attach the speaker of an alarm clock (digital, more accurate), to a model rocket ignitor (or any other homemade one). If the current going to the speaker is too low, then just attach a 9volt battery to one of the wires and then to the ignitor. The alarm clock would be pretty reliable, and the model rocket ignitor would be reliable as well.
Dracul
Frequent Poster
Posts: 73
From: Melbourne, Australia
Registered: SEP 2000
posted February 08, 2001 08:55 AM
--------------------------------------------------------------------------------
Have you tried that? For some reason I don't think it would work. For my timer I have a transistor connected to a speaker wire. The transistor controls the power to a relay which uses a 6V lead/acid battery to burn a light globe detonator or nichrome wire etc.
[This message has been edited by Dracul (edited February 10, 2001).]
SofaKing
Frequent Poster
Posts: 392
From: YEAH RIGHT !!
Registered: SEP 2000
posted February 09, 2001 01:58 AM
--------------------------------------------------------------------------------
This might be stupid and unsafe.
On the site Bob linked to in the water rocket page. A there's somthing called a tomy timer, basiclly the guts of a wind up toy is used to get a delay. I think this could be adapted to suit our needs. The main concern would be safty.
blackadder
Frequent Poster
Posts: 313
From: London
Registered: DEC 2000
posted February 09, 2001 04:09 PM
--------------------------------------------------------------------------------
Dracul, I haven't tried it, but I'm pretty sure it would work, why wouldn't it?
zaibatsu
Frequent Poster
Posts: 403
From: England
Registered: SEP 2000
posted February 09, 2001 04:47 PM
--------------------------------------------------------------------------------
i think because by attaching a battery to one of the alarm wires then you have got a power source putting electricity through the model rocket ignitor at all times. Wouldn't this mean it would ignite as soon as you plugged the battery in? This may be wrong, but could you explain in more detail please?
------------------
Handguns don't kill people... Half as well as full-auto
Visit me at <a href="http://www.surf.to/eliteforum" target="_blank">www.surf.to/eliteforum</a>
Dracul
Frequent Poster
Posts: 73
From: Melbourne, Australia
Registered: SEP 2000
posted February 10, 2001 03:08 AM
--------------------------------------------------------------------------------
Yeah that's what I was thinking, when you connect a battery up to something like that it tends to let the current flow from the battery even when the alarm isn't going. Better to use the alarm to control a transistor, most relay's don't switch with a low voltage like that. Lowest I have seen is 6V.
------------------
Check this out <a href="http://www.stileproject.com" target="_blank">www.stileproject.com</a>
blackadder
Frequent Poster
Posts: 313
From: London
Registered: DEC 2000
posted February 10, 2001 05:16 PM
--------------------------------------------------------------------------------
On an alarm clock, there isn't a current going through the speaker wires constantly, is there?
The idea is, that you replace the speaker for a model rocket ignitor, and set a time for the alarm to go off, and when it goes off, a current is sent to the speaker, but there isn't the speaker there's a rocket ignitor, and it passes through the ignitor and burns it up.
Even though this is another one of my stupid ideas, I still don't see why it shouldn't work, I guess there's only one way to find out! If I have the time, that is.
zaibatsu
Frequent Poster
Posts: 403
From: England
Registered: SEP 2000
posted February 10, 2001 06:09 PM
--------------------------------------------------------------------------------
Two things. What you have just stated ISN'T what you originally said (ie, about hooking the battery up to give more power). Also, the power going to the speaker is very low i think, and so wouldn't be enough to ignite the ignitor.
------------------
Handguns don't kill people... Half as well as full-auto
Visit me at <a href="http://www.surf.to/eliteforum" target="_blank">www.surf.to/eliteforum</a>
Anthony
Moderator
Posts: 2304
From: England
Registered: SEP 2000
posted February 10, 2001 06:50 PM
--------------------------------------------------------------------------------
I think whay he means is to connect the battery up to one of the wires going to the ignitor, so that it is in series with the power source for the speaker.
sealsix6
Frequent Poster
Posts: 154
From: NYC,NYC,USA
Registered: NOV 2000
posted February 10, 2001 08:10 PM
--------------------------------------------------------------------------------
this is a little bit off topic but I thik i will ask anyway. If anyone saw CSI the other day (2-8-01) there was a kid blowing up people with a bomb and the switch/timer was at the bottom was a mouse trap and when they picked it up the mouse trap did something to start the clock moving (not digital clock) and i cant figure out how the mouse trap was rigged to the clock so if anyone saw it or knows i would appreacite it if you could say how it works and another EASY timer is just take a alarm clock and put a bolt in the face plate with a wire wrapped around it leading to the positive side of the battery and then have the minit hand with a wire wrapped around it leading to the negative side of the battery or you can hook it up to the hour hand and have a 12 hour delay
Anthony
Moderator
Posts: 2304
From: England
Registered: SEP 2000
posted February 10, 2001 08:34 PM
--------------------------------------------------------------------------------
Using analouge timers is very unreliable, say the wire connected to the hand was too stiff and stopped it turning at all? Or if the connections are bad? So much easier with an electronic timer.
blackadder
Frequent Poster
Posts: 313
From: London
Registered: DEC 2000
posted February 11, 2001 09:17 AM Frequent Poster
Posts: 73
From: Melbourne, Australia
--------------------------------------------------------------------------------
Zaibatsu:
I forgot about the battery thing, sorry about that.
"I think what he means is to connect the battery up to one of the wires going to the ignitor, so that it is in series with the power source for the speaker."
Anthony worded it well, that's what I mean by hooking it up to the battery.
J
Moderator
Posts: 602
From: United Kingdom
Registered: SEP 2000
posted February 11, 2001 11:19 AM
--------------------------------------------------------------------------------
A good digital timer is a shift register with a slow clock. No analogue electronics involved, timing is also exact.
J
------------------
"If the aquarium water has to be drunk don't waste the fish. In fact they'll probably be the easiest to eat even if you don't need the water. The cat is next in the pot." - John 'Lofty' Wiseman
Jumala
Frequent Poster
Posts: 199
From: Germany
Registered: OCT 2000
posted February 11, 2001 09:35 PM
--------------------------------------------------------------------------------
Hallo Alengosvig,
have you got the timer plan?
Frequent Poster
Posts: 54
From:
Registered: DEC 2000
posted February 04, 2001 10:06 PM
--------------------------------------------------------------------------------
Does anyone have any ideas for a really basic timer?, I want one that dosen't cost me heaps(cos its gonna get blown up), and is easy to make/aquire.
~Ço§§aÇ~
ALENGOSVIG1
Moderator
Posts: 766
From: Vancouver, Canada
Registered: NOV 2000
posted February 04, 2001 10:36 PM
--------------------------------------------------------------------------------
<img src="http://www.angelfire.com/mb2/alspalace/timer.gif" alt=" - " />
J
Moderator
Posts: 602
From: United Kingdom
Registered: SEP 2000
posted February 05, 2001 08:11 AM
--------------------------------------------------------------------------------
Personally I wouldn't trust a simple timer like this with my life. This isn't to say it won't work (it will), but things like dead batteries, magnetic interference, a faulty wire/dry joint could cause it to malfunction. Test each constructed circuit thoroughly before use!
I can't remember the exact spec of the 555, but some digital circuits don't output 0v at logic level 0. The level might be as much as a couple of volts, maybe enough to trigger your relay. I'd want to view the output with a CRO to be sure.
J
------------------
"If the aquarium water has to be drunk don't waste the fish. In fact they'll probably be the easiest to eat even if you don't need the water. The cat is next in the pot." - John 'Lofty' Wiseman
ALENGOSVIG1
Moderator
Posts: 766
From: Vancouver, Canada
Registered: NOV 2000
posted February 05, 2001 03:30 PM
--------------------------------------------------------------------------------
Oh ya, there a store in my area called princess auto, it sells microwave timers cheap. U can also get ammo cans for a few bucks, and ammo cans for Missiles..
------------------
Explosives Archive
10fingers
Frequent Poster
Posts: 411
From: USA
Registered: SEP 2000
posted February 05, 2001 03:45 PM
--------------------------------------------------------------------------------
You can buy a cooking timer for $5.00 at Wal-Mart. I think they are one hour. I would not trust a timer of the type shown above, too many things to go wrong.
Another safety precaution I would take is to have the timer ignite a fuse to the detonator instead of having it go directly to the detonator. This way if your timer malfunctions it will light the fuse which will give you a few seconds to react.
-CossaC-
Frequent Poster
Posts: 54
From:
Registered: DEC 2000
posted February 05, 2001 04:11 PM
--------------------------------------------------------------------------------
Yeah the problem with having a fuse there is that it leaves one more thing to go wrong, and no body likes goin to have a look at it, when it has failed to go off.
~Ço§§aÇ~
CragHack
Frequent Poster
Posts: 606
From:
Registered: DEC 2000
posted February 05, 2001 04:15 PM
--------------------------------------------------------------------------------
yeah i would suggest the timer going roght to the detonator. like he said just one more thing to go wrong. i hate checking liitle fire crackers when they don't light let alone something bigger.
------------------
...Ĉ
10fingers
Frequent Poster
Posts: 411
From: USA
Registered: SEP 2000
posted February 05, 2001 06:34 PM
--------------------------------------------------------------------------------
If your timer fails are you going to wanna go look at it?
ALENGOSVIG1
Moderator
Posts: 766
From: Vancouver, Canada
Registered: NOV 2000
posted February 05, 2001 06:39 PM
--------------------------------------------------------------------------------
nope, just shoot at it for awhile.
sealsix6
Frequent Poster
Posts: 154
From: NYC,NYC,USA
Registered: NOV 2000
posted February 05, 2001 06:50 PM
--------------------------------------------------------------------------------
I have a question does anyone know a site where i can find eletrical explanations for like basic eloctroncis because I have no clue about the schematics (such as the one above) and I would like to learn more about them such as what the syombols mean and how to build stuff using the schematics
Metal
Frequent Poster
Posts: 137
From: I'm everywhere.
Registered: NOV 2000
posted February 05, 2001 07:20 PM
--------------------------------------------------------------------------------
You can find some stuff here:
<a href="http://www.epanorama.net/basics.html" target="_blank">http://www.epanorama.net/basics.html</a>
------------------
"I'm not a slave to a god that doesn't exist. I'm not a slave to world
that doesn't give a shit" - Marilyn Manson
-CossaC-
Frequent Poster
Posts: 54
From:
Registered: DEC 2000
posted February 06, 2001 04:29 PM
--------------------------------------------------------------------------------
Well if I use the timer to detonate a large amount of SP for example, i sure as hell don't wanna leave it out waiting to get rained on.
~Ço§§aÇ~
Jumala
Frequent Poster
Posts: 199
From: Germany
Registered: OCT 2000
posted February 06, 2001 08:06 PM
--------------------------------------------------------------------------------
Hello all,
I have seen the NE555 timer and can only warn you all. The 555 timer can only produce a on-impulse of a length defined by the RC line.
What here is needed is at first a delay of a defined length and then a on-impulse to set something off. A 555 timer cannot do this job at a satisfactory way and it has no safety in handling.
The MOS 4541 circuit is a programmable binary counter with own RC oscillator.
You can simple calculate the oscillators frequency and set the delay time with two jumpers. In my timer I have build in two watcher functions to control the timers and the switching transistors condition.
All parts shouldn´t cost much more than 5 bucks and some work to solder them together.
I haven´t build a homepage so I cannot post the plan. Perhaps can somebody put the plan at his homepage?
ALENGOSVIG1
Moderator
Posts: 766
From: Vancouver, Canada
Registered: NOV 2000
posted February 06, 2001 10:04 PM
--------------------------------------------------------------------------------
i can post it on my website. E-mial me at alengosvig@yahoo.com and i will upload them.
blackadder
Frequent Poster
Posts: 313
From: London
Registered: DEC 2000
posted February 07, 2001 01:40 PM
--------------------------------------------------------------------------------
All I would do is attach the speaker of an alarm clock (digital, more accurate), to a model rocket ignitor (or any other homemade one). If the current going to the speaker is too low, then just attach a 9volt battery to one of the wires and then to the ignitor. The alarm clock would be pretty reliable, and the model rocket ignitor would be reliable as well.
Dracul
Frequent Poster
Posts: 73
From: Melbourne, Australia
Registered: SEP 2000
posted February 08, 2001 08:55 AM
--------------------------------------------------------------------------------
Have you tried that? For some reason I don't think it would work. For my timer I have a transistor connected to a speaker wire. The transistor controls the power to a relay which uses a 6V lead/acid battery to burn a light globe detonator or nichrome wire etc.
[This message has been edited by Dracul (edited February 10, 2001).]
SofaKing
Frequent Poster
Posts: 392
From: YEAH RIGHT !!
Registered: SEP 2000
posted February 09, 2001 01:58 AM
--------------------------------------------------------------------------------
This might be stupid and unsafe.
On the site Bob linked to in the water rocket page. A there's somthing called a tomy timer, basiclly the guts of a wind up toy is used to get a delay. I think this could be adapted to suit our needs. The main concern would be safty.
blackadder
Frequent Poster
Posts: 313
From: London
Registered: DEC 2000
posted February 09, 2001 04:09 PM
--------------------------------------------------------------------------------
Dracul, I haven't tried it, but I'm pretty sure it would work, why wouldn't it?
zaibatsu
Frequent Poster
Posts: 403
From: England
Registered: SEP 2000
posted February 09, 2001 04:47 PM
--------------------------------------------------------------------------------
i think because by attaching a battery to one of the alarm wires then you have got a power source putting electricity through the model rocket ignitor at all times. Wouldn't this mean it would ignite as soon as you plugged the battery in? This may be wrong, but could you explain in more detail please?
------------------
Handguns don't kill people... Half as well as full-auto
Visit me at <a href="http://www.surf.to/eliteforum" target="_blank">www.surf.to/eliteforum</a>
Dracul
Frequent Poster
Posts: 73
From: Melbourne, Australia
Registered: SEP 2000
posted February 10, 2001 03:08 AM
--------------------------------------------------------------------------------
Yeah that's what I was thinking, when you connect a battery up to something like that it tends to let the current flow from the battery even when the alarm isn't going. Better to use the alarm to control a transistor, most relay's don't switch with a low voltage like that. Lowest I have seen is 6V.
------------------
Check this out <a href="http://www.stileproject.com" target="_blank">www.stileproject.com</a>
blackadder
Frequent Poster
Posts: 313
From: London
Registered: DEC 2000
posted February 10, 2001 05:16 PM
--------------------------------------------------------------------------------
On an alarm clock, there isn't a current going through the speaker wires constantly, is there?
The idea is, that you replace the speaker for a model rocket ignitor, and set a time for the alarm to go off, and when it goes off, a current is sent to the speaker, but there isn't the speaker there's a rocket ignitor, and it passes through the ignitor and burns it up.
Even though this is another one of my stupid ideas, I still don't see why it shouldn't work, I guess there's only one way to find out! If I have the time, that is.
zaibatsu
Frequent Poster
Posts: 403
From: England
Registered: SEP 2000
posted February 10, 2001 06:09 PM
--------------------------------------------------------------------------------
Two things. What you have just stated ISN'T what you originally said (ie, about hooking the battery up to give more power). Also, the power going to the speaker is very low i think, and so wouldn't be enough to ignite the ignitor.
------------------
Handguns don't kill people... Half as well as full-auto
Visit me at <a href="http://www.surf.to/eliteforum" target="_blank">www.surf.to/eliteforum</a>
Anthony
Moderator
Posts: 2304
From: England
Registered: SEP 2000
posted February 10, 2001 06:50 PM
--------------------------------------------------------------------------------
I think whay he means is to connect the battery up to one of the wires going to the ignitor, so that it is in series with the power source for the speaker.
sealsix6
Frequent Poster
Posts: 154
From: NYC,NYC,USA
Registered: NOV 2000
posted February 10, 2001 08:10 PM
--------------------------------------------------------------------------------
this is a little bit off topic but I thik i will ask anyway. If anyone saw CSI the other day (2-8-01) there was a kid blowing up people with a bomb and the switch/timer was at the bottom was a mouse trap and when they picked it up the mouse trap did something to start the clock moving (not digital clock) and i cant figure out how the mouse trap was rigged to the clock so if anyone saw it or knows i would appreacite it if you could say how it works and another EASY timer is just take a alarm clock and put a bolt in the face plate with a wire wrapped around it leading to the positive side of the battery and then have the minit hand with a wire wrapped around it leading to the negative side of the battery or you can hook it up to the hour hand and have a 12 hour delay
Anthony
Moderator
Posts: 2304
From: England
Registered: SEP 2000
posted February 10, 2001 08:34 PM
--------------------------------------------------------------------------------
Using analouge timers is very unreliable, say the wire connected to the hand was too stiff and stopped it turning at all? Or if the connections are bad? So much easier with an electronic timer.
blackadder
Frequent Poster
Posts: 313
From: London
Registered: DEC 2000
posted February 11, 2001 09:17 AM Frequent Poster
Posts: 73
From: Melbourne, Australia
--------------------------------------------------------------------------------
Zaibatsu:
I forgot about the battery thing, sorry about that.
"I think what he means is to connect the battery up to one of the wires going to the ignitor, so that it is in series with the power source for the speaker."
Anthony worded it well, that's what I mean by hooking it up to the battery.
J
Moderator
Posts: 602
From: United Kingdom
Registered: SEP 2000
posted February 11, 2001 11:19 AM
--------------------------------------------------------------------------------
A good digital timer is a shift register with a slow clock. No analogue electronics involved, timing is also exact.
J
------------------
"If the aquarium water has to be drunk don't waste the fish. In fact they'll probably be the easiest to eat even if you don't need the water. The cat is next in the pot." - John 'Lofty' Wiseman
Jumala
Frequent Poster
Posts: 199
From: Germany
Registered: OCT 2000
posted February 11, 2001 09:35 PM
--------------------------------------------------------------------------------
Hallo Alengosvig,
have you got the timer plan?