Build your own (cheap!) multi-function wireless camera controller.

Step 6 Component/Supply List

SCHEMATIC: http://img8.imageshack.us/img8/8904/cameracontrollerschemat.png - read the breadboard tutorials first in case i've made any mistakes!

CPU/LCD
1x ATMega8 or ATMega88/168 (needs at least 8k of memory) £1.50
1x HD44780 compatible LCD screen £4-6 (6 if you want cool colours) from eBay
1x 10K Pot (or try different resistors) for contrast control 10-30p
1x 4MHz Crystal - 20p
2x Ceramic/Tantalum 22pF capacitors - 20p
1x 4K7-10K resistor (any will do really)
1x 10-pin Male Header/Socket (if you want a programming port on the finished board - recommended) - http://www.labombiya.com.ar/images/10pin-6pin/dsc00457.jpg
1x 28 pin DIL socket (0.3")
2x Mini LEDs Red, Green (3mm, but you can go with whatever colour you want really...)
Total: ~£8

Power
1x MAX619 DIP8 - £2.71 Farnell
1x 8 pin DIL socket
2x Tantalum 470nF capacitors - 20p
2x 22uF Low ESR electrolytic capacitors - 20p
Total: ~£3.50

IR
1x High Power IR LED (2V, 100mA) - 15p (rapid 58-0112)
1x 18R Resistor
1x 2N7000 MOSFET (or similar) - 10p
0.5m Speaker Cable (or other 2 core wire) - 50p
Total ~£0.75

Input
6x Switches SPST momentary - £1.20
1x On/Off Switch - 40p
Total ~£1.50

Light Trigger
1x Light Dependent Resistor or Photodiode - 30p
1x Potentiometer, rated the same as the maximum resistance of the LDR/diode - 10-50p
Total ~£1

Sound Trigger
1x Electret Microphone - 50p (cheap to buy in bulk on eBay)
1x 220R resistor
1x 100n capacitor (ceramic/tantalum) - 1p
1x TL072 or similar Op-Amp - 20p
1x 10uF capacitor - 10p
2x 22K resistors
1x 1K2 resistor
1x 1K resistor
1x 1M Potentiometer for varying gain (0 - 1000) 50p
Total: ~£2.00

Enclosure
1x ABS Enclosure, to fit components - your choice entirely what sort you get - 70p
1x Battery Box, dual AA - 20p
Total: ~£1

Programmer
USBasp - £12 from eBay
1x 10 pin ISP header
1x 28 pin DIL socket (0.3")
Total £12

Tools/Sundries
Soldering Iron
Solder wire
Solder sucker/Braid

Small Files
Dremel/Rotary Tool
Needle Nose Pliers
Scissors
Wire Strippers

Wires (both single and multi stranded)
Stripboard


Cost minus tools/programmer: £18 ish
Parts were bought from RapidOnline and Farnell UK.  Prices are roughly accurate.  I don't count resistors in the price because they are so cheap these days and per unit they're about £0.0025.  It's worth coughing up for a selection anyway, they cost around £5-6 for mixtures of around 600 resistors.

If i've missed a component out but use it later in a schematic, i apologise profusely!