Parts List:

Part	Description	Radio Shack #	DigiKey #	Notes
R1	22Meg resistor			red red green gold
R2	47K resistor			yellow purple orange gold
R3,R4	100K resistor			brown black yellow gold
R5,R6,R7	2K2 resistor			red red red gold
C1	Capacitor, 22µF, 25V			Electrolytic
C2	Capacitor, 22µF, 25V			Electrolytic
Q1	MPF102			Transistor, NPN
Q2,Q3	2N3565			Transistor, NPN
Q4	TIP31			Transistor, NPN
La1	Bulb, #53			Try others

Couple Notes:
The MPF102 (Q1) can be replaced with a NTE451 or ECG451, but still widely available. JFET-N-CHAN, UHF/VHF AMP
The 2N3565 (Q1/Q2) can be replace with a 2N2222(A), BC107, BC108, BC109(A/B/C), NTE123A, or ECG123A.
The TIP31 (Q3) can be replaced with a NTE196 or ECG196, but is a common type and widely available. NO suffix.

The 'Touch Plate' can be anything non corrosive. I use a silver quarter.

You can also use a small relay instead of the #53 bulb.

The phone number for DigiKey is 1-800-Digi-Key.

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Copyright ©1996 - Tony van Roon