Januari 2011

12V to19V Power Supply

R1 = 5k6 R2 = 51k (51k1) R3 = 9k1 (9k1) R4 = 1M R5 = 4k7 R6,R8 = 15k R7 = 27k R9,R10 = 6,8 R11 = 10k R12 = 100 P1 = 5k preset Capacitors: C1-C4 = 3300µF 16V, radial, C5,C10 = 1µF MKT, C12 = 1µF MKT, C6-C9 = 2200µF 25V radial C11 = 22nF, C13 = 2nF2, C14,C15 = 100nF ceramic, C16 = 10µF 63V radial Inductors: L1 = 56µH, 21 turns 10 x 0.5 mm ECW, parallel 1 x ETD 29 braid forner, 2...

FLIP-FLOP

R1 = R4 = 1 KR2 = R3 = 100KR2 = R3 = 100KC1 = C2 = 10µF/16VC1 = C2 = 10μF/16VQ1 = Q2 = đèn C828 Q1 = Q2 = C828Lamp Two L...

Mono Audio Amplifier

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100watt Inverter

T1 can be a 9-0-9 V primary, 230V secondary, 150VA transfor...

FM Transmitter

Inductor L3 can be a VK220J type RFC. For L1 make 3 turns of 1mm enamelled copper wire on a 10mm diameter plastic former. On the same core make 2 turns of 1 mm enamelled copper wire close to L3 and that will be ...