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Posts tagged ohm

Circuit diagram 75 Meter QRP SSB Transceiver

The 75 Meter QRP SSB Transceiver Theory of Operation 6-30-03 In general, the transceiver switches the 4-element 1500 ohm xtal BPF ends between the inputs and outputs of the two SA602s to reverse the signal flow for R/T operation. Since no IF amplifier is used in the design, 20 dB of additional receiver gain is […]

Electronics Projects

Electronics Projects Electronics Circuit IC LM386 Alarm circuit Buzzer Ultrasonic Electronics Circuit Collection of LM386 Data sheet Home intercom Microphone circuit Walkie talkie Amplifier Circuit Board

Electronics Circuit Programmable LED light

Electronics Circuit Programmable LED light circuit diagram flashing LED that, after a preset number of flashes will illuminate steadily until P1 Reset Parts: R1______________10K 1/4W R2_______________1M 1/4W R3_______________1K 1/4W C1_______________4µ7 25V C2______________10nF 63V D1___________1N4148 75V 150mA D2______________LED IC1____________4060 B1______________3V to 15V Battery

Shunt Reg circuit diagram

Shunt Reg circuit diagram using BC549C, 2SJ200-201

Dimmer

Dimmer using 40502 TRIAC Dimmer using 40502 TRIAC Parts R1 50K Pot R2 15K 1/2W Resistor C1, C2 0.068 250V Capacitor L1 Lamp To Be Controlled (up to 350 watts) L2 Neon Lamp TR1 40502 TRIAC MISC Case, Knob, Heatsink For TR1, Wire, Socket For L1 Notes 1. This circuit is for 117VAC only. 220 […]

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