Delay Detonator
—————
This phile shows how to build a simple electronic delay detonator for
almost any type
of bomb that uses fire to detonate. This detonator can also
be modified to activate blasting
caps for detonating Plastique etc. All of
the parts are easily available at Radio Shack or
other electronic stores. One
drawback of this detonator is that it costs about $10 in parts
to make one. But if you
are rich or if you need more of a delay than a fuse can provide,
this’ll do
the trick.
Parts List: Part # R.S. Cat. # Cost
2 Switching
Diodes (1N914) 276-1122 $0.99
10K Resistor 271-034 $0.19
Relay Switch (6V) 275-004
$2.99
IC Timer 555 276-1723 $1.19
Mini LED 276-059 $0.99
Electrolytic capacitor
(Size depends on delay desired)
Resistor (Size depends on delay desired) $0.19
Push
button switch (any model)
2 9-Volt Batteries (Cheap, but new ones)
Small piece of
breadboard approx $1.00
24 gauge solid core insulated wire
Soldering tools
Solar Igniters (electric matches available at hobby stores)
Mini Alligator clips (roach
clips)
*** NOTE: Any SPDT 6 volt, 500 ohm, 12 mA relay can be used
instead of
#275-004. Especially because #275-004
takes up a lot of room on the board.
***
NOTE: Many of the parts are sold in sets and you will
only need one. So, if you build more
than one
detonator, you won’t have to buy more of some
parts.
Schematic
Diagram of Circuit. (solder everything on breadboard)
9 volt +
/|\ For values of R1
and C1 see notes
__________________|____________________ at the end of this phile.
| |
| |
| ____|8_______|4____ |
\ | | | D1
/ R1 | |3__________|\|_______o R
x______________
\ | | |/| | E |
/ | 5 5 5 | | | o L x________ |
| | | \ | | A |
- |
| | Integrated | / R2 | | Y | —–
|____________7| Circuit | \ _|__ | LED — 9
| | | / /\ | | + | v
|____________6| |2___| D2 /__\ | | | o
| | | | | | A | l
| |___________________| | |____| | | t
| |1 |5 — | | |
| C1 | | — Switch |
|_____|
|_______| (______|______|______________|___________|
+ | A= Alligator
—– R2=10K ohms Clips
—
- Ground (-) ** note: no connection between pins
3
& 4.
The bottom of the relay has five pins. The pins here are marked with an
"x" or an "o" corresponding to the schematic:
____________________
| |
| x o | RELAY SWITCH
| | (bottom base)
| |
| N o x | N= not
used
|___________________ |
The alligator clips should be attached to the
breadboard using short
pieces of wire.
The longer lead on the LED is the
positive lead. Make sure you hook it
up with the right polarity. Same rule goes for the
capacitor.
The pins on the 555 IC are numbered from the top (side with paint &
notch).
On the left side the read DOWN as 1,2,3,4. On the right side the read DOWN
8,7,6,5.
TEST
Attach the two batteries and clip roach clips together, the LED
will light.
Press and hold the switch for 3 seconds. You should hear a click then the
LED will go out. In a little while (depending on what capacitor and resis-
tor size you use),
you should hear another click and the LED will turn on
again. If this doesn’t happen, you
phucked up! Check your circuit care-
fully.
USING DETONATOR
****
Read these instructions carefully before attempting this ****
If the TEST worked, the
timer is ready to use. Attach two fresh batteries
and connect the two roach clips. Allow time
equivalent to your delay for
the capactitor to charge. Now, press the switch until the LED
goes out.
Now, quickly but carefully attach the roach clips to the Solar Igniter that
has been previously attached to your bomb. Then, get the phuck out of
there!!! Once the time
delay expires, the relay will open completing the
second circuit and igniting the Solar
Igniter.
Tech Note: The values of R1 and C1 determine the time delay. The
greater these
values, the longer the delay. The equation to determine time delay
is as
follows:
C1 (in farads) x R1 (in ohms)
Time (in seconds) =
———————————
6
The value of C1 is in farads. Most capacitors are
listed in micro-
farads. To use the formula, divide the number of microfarads by
1,000,000.
Example: If you use a 500 microfarad capacitor for C1 and a 10
megaohm resistor for R1, you would have a delay of 14
minutes (833 seconds).
DOWNLOADED FROM P-80 SYSTEMS 304-744-2253
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