Long honk setting with false triggering Short honk setting no false triggering
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UPDATE 10/15/2009: Installed BIG RED button which is much more tempting don't you think?
Long honk setting with false triggering
Short honk setting no false triggering
Describing false trigger problem Showing false triggers on Oscilloscope
Below is a parts, materials and tools list for this project.
Where possible I included pricing and a link to a retailer.
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Tools:
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(1) Solder iron
(1) Digital Multi Meter
(1) Knife to cut eyes, mouth and top out of the polyvinyl pumpkin
(1) Wire cutters
(1) Wire strippers
(1) Exacto Knife
(1) De-solder bride or a solder sucker to correct mistakes
(1) Crimp tool for terminal connectors
(1) 9v battery or power supply for testing your control circuit,
but once you start turning on the horn you will
need to use the 5Ah 12v battery because the horns take 4.5A.
You could do all your prototyping and testing with the 12v
5Ah battery but if you make a short you will get quite a lot of sparks and smoke.
So if you do all your testing with the 9v battery or
current limited power supply they are a lot more forgiving.
General supplies:
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(1) Solder
(1) Shrink rap good for 18AWG and 22AWG stranded wire.
(1) Wire ties
Parts:
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Ceramic disk capacitors
(6) 0.01uf
(2) 0.05uf
(2) 0.1uf
Electrolytic capacitors
(2) 1uf rated for 50v
Resistors
(6) 10K
(2) 47K
(1) 100K
(1) 500K POT
(1) 1.5M
(1) ALTOIDS tin
(1) Pumpkin
14.5 inch Polyvinyl (foam)
Michaels craft and art store.
Can't buy online but they are cheap at the stores
Pumpkin
(2) MOSFET STMicroelectronics - P10NK60ZFP
N-channel 650 V, 0.65ohm, 10 A, SuperMESH Power MOSFET Zener-protected
Get a free samples at: Samples P10NK60ZFP
Buy for $2.69 at: digikey.com P10NK60ZFP Datasheet
(1) Solderless Breadboard Jumper Wire Kit
#276-173 $5.99
Jumper Wire Kit
(1) 75-Ft. UL-Recognized Hookup Wire (22AWG) stranded
#278-1224 $6.59 (Includes three 25ft spools of black, green, red)
22AWG spools in black, green, red
(1) 45-Ft. UL-Recognized Hookup Wire (18AWG) stranded
#278-1226 $6.99 (Includes three 15ft spool of black, green, red)
18AWG spools in black, green, red
(1) 1/4" Fully Insulated Quick Disconnect Spade Connectors (10-Pack)
#64-3131 $2.19
Disconnects
(1) Battery 12V/5Ah NP5-12 Sealed Lead-Acid
#55029979 $29.99 (I used this but I had it already)
Battery 12V/5Ah
or 12V/1.3Ah Sealed Lead Acid Battery $15.99
Battery 12V/1.3Ah
(1) Toggle Switch with On/Off Label Plate
#275-602 $2.99
On/Off Switch
(1) Mini SPDT 3-Amp Momentary Pushbutton Switch
#275-1549 $3.99 (I used this because I already had it)
Momentary Switch small
#COM-09336 $1.95 (MUCH better button !!!!)
Momentary Switch large
(1) Matching Printed Circuit Board with 550 Connect Points
This project board has the same layout as a breadboard so
transferring your circuit to a final board is easy.
#276-170 $2.99
Project Circuit Board
(1) Modular IC Breadboard Socket
This is not needed but if you don't have a prototyping breadboard you should get this one
so you can layout and test your circuit before soldering all your electronics permanently.
#276-003 $8.99
Breadboard
(2) TLC555/TLC555CP LinCMOS Timer (8-Pin DIP)
#276-1718 $1.69
555 IC
(2) 8-Pin Retention sockets
You need these for the 555 timers because if you kill one it’s a ton easier to
replace if they are in a socket instead of soldered to the project board.
#276-1995 $0.48
8-Pin Sockets
(1 package) Red Sylvania / Bulb - Instrument Panel Light (set of two bulbs)
#194R $2.99 from Autozone.com but you can get any 12v red buld you like.
(1) BATTERY CHARGER 12v 1.5 AMP
#93258-1VGA $15.00
BATTERY CHARGER
(1) Horn Set 12 Volt (comes with two horns for high and low plus a relay to control the horns)
#99911 $9.00 (in store only!)
12 Volt horn set