EMP shopping cart locker

Step 5 Obtain components and tools

Parts you will need:

1) Printed circuit board (see below)
2) Digikey order (see below)
3) 2x 8.4 or 9.6 volt NiCd or NiMH batteries and charger. Cheapies from a toy store or Target or Walmart work great. NiCd tends to have the highest power output.

Tools you will need
1) soldering iron and solder
2) crimpers
3) screwdriver
4) pliers or small wrenches/sockets
5) PIC programmer-- we used the ICD2 from Microchip (also available on Digikey)

The PCB is best professionally printed. If you really like to do things by yourself, you can try the iron-on approach. Making PCBs at home

Included here are Eagle files. Eagle is a free PCB CAD program. Many instructables use this software. You can also just send the board manufacturer the Gerber and Excellon files, also included below. Some board manufacturers also ask for the fabrication drawing.

.sch and .brd are Eagle files.
.sol and .cmp are Gerber copper layer files
.drd is Excellon drill data
.fab is the Gerber fabrication drawing

Digikey order:

1x PIC16F716-I/P-ND (PIC)
1x X909-ND (20 MHz ceramic resonator)
1x 563-1085-ND (rotary switch)
4x IRF1407PBF-ND ("beefy" MOSFET, could probably get away with a cheaper part)
4x ES3AB-FDICT-ND (protection diodes)
2x IR2104PBF-ND (MOSFET drivers)
4x BER199-ND (insulating pads)
4x RP338-ND (TO-220 screw insulators, 25 minimum)
4x HS106-ND (small heat sinks)
1x 565-1066-ND (giant capacitor)
1x WM8121-ND (6 pos. header)
1x LM7805CT-ND (5V voltage regulator)
6x BC1157CT-ND (1 uF ceramic capacitor, 10 minimum)
2x MURS120-FDICT-ND (diodes right above IR2104)
6x 311-10KARCT-ND (10k 0805 resistors, 10 minimum)
4x 22QBK-ND (22 ohm 1/4 watt resistors, 5 minimum)
1x F2512-ND (fuse, 5 minimum, get extras)
1x F1467-ND (fuseholder)
1x ED3318-ND (18 pos. PIC socket)
2x ED3308-ND (8 pos. IR2104 socket)
1x SW293-ND (lever action switch)
3x WM2308-ND (connector plug, buy more)
3x WM2309-ND (connector socket, buy more)
6x WM2310-ND (connector receptacle, buy more)
6x WM2311-ND (connector pin, buy more)

Buy extra connector parts; they are flaky, but thankfully cheap. Solder them for best results. The batteries will probably have one end of the connector installed, but having the proper mating parts on hand is cheap insurance. You may want to try a different connector.

A few other pieces are also needed:

#4-40 screws and nuts for heat sinks (Home Depot or Digikey)
electrical tape (Home depot)
50 ft 18 ga wire (Digikey only has 100' rolls, try auto parts store)
5 ft flexible 2 conductor wire for switch, ~22-24 ga

Note that some of Digikey's minimum quantites are more than required above. Since these parts are little and cheap, you probably want spares anyway. SMT resistors are especially easy to lose.

Comments

[splapped]

I sell all of those parts. I could get you them cheaper too, just talk to ari at reliantelectronics.com

[Opcom]

Oh great, now we got a disty sales channel going. (smile) Are my employer's semiconductors on your line card? ooh this is thin ice.. I only can see the front side of the line card on your web page. Funny how the recorded 8KHz signal (the ogg file) sounds like a squeaky cart wheel.