Part Value Digikey # Description --------------------------------------------------------------------------------------------------------- BAT1 2479K-ND 3xAAA battery holder, 2479 from Keystone C1 1u 445-2858-ND capacitor, 1 uF, 16 V, ceramic C2 1n 399-4322-ND capacitor, 1 nF, 200 V, ceramic C4 1n 399-4322-ND capacitor, 1 nF, 200 V, ceramic C3 2.2n 399-4347-ND capacitor, 2.2 nF, 200 V, ceramic C5 100p 399-4199-ND capacitor, 100 pF, 200 V, ceramic D1 1N3595CT-ND diode, 1N3595 type D2 2EZ130D5DO41MSCT-ND zener diode, 120 V, 2EZ130D5DO41 from Microsemi or equiv IC1 PIC16F628-20/P-ND PIC16F628, PDIP package, 20 MHz speed grade LED1 CMD3450-ND green LED, T1-3/4, any LED2 516-1699-ND white LED, T1-3/4, any Q1 2N3904FS-ND transistor, NPN, 2N3904 type Q2 2N3906FS-ND transistor, PNP, 2N3906 type R1 330 330QBK-ND resistor, 330 ohm, 1/4 W, 5% R3 330 330QBK-ND resistor, 330 ohm, 1/4 W, 5% R2 10k 10KQBK-ND resistor, 10k ohm, 1/4 W, 5% R7 3.3M 3.3MQBK-ND resistor, 3.3M ohm, 1/4 W, 5% R9 3.3M 3.3MQBK-ND resistor, 3.3M ohm, 1/4 W, 5% R8 510k 510KQBK-ND resistor, 240k ohm, 1/4 W, 5% R5 100k 100KQBK-ND resistor, 100k ohm, 1/4 W, 5% R6 1k 1.0KQBK-ND resistor, 1k ohm, 1/4 W, 5% SV1 antenna (see below) SV2 WM4304-ND 6-pin 0.100" male 0.025" square header, if ICSP is used SW1 401-1899-ND tact switch, green, D6R50 LFS from ITT/Cannon or equiv SW2 401-1894-ND tact switch, white, D6R00 LFS from ITT/Cannon or equiv U1 10.000 MHz 535-9353-ND ceramic resonator, AWCR-10.00MD from Abracon or equiv antenna: Try R-037300-61 from CWS Bytemark (made of Material 61, 0.37" by 3" rod). Wind 140 turns #30 AWG magnet wire. Then apply power, and press white button to energize coil. Measure DC voltage from cathode of D1 to ground, and remove turns from coil to increase that voltage; expect about 80 V when tuned. Exact turns count will depend on component tolerances and winding method, but expect to remove ~30 turns. Voltage will increase slowly at first, then faster. Jonathan Westhues, Sep 2006