The low impedance circuit as the circuit diagram is an easy hum. But If using 12V power supply we should R3 is 12K. If using 9 volts power supply, R3 should be at 6.8K. If you want the voltage at this point to be greater than half We can do this by changing the value R3 to more values. We should read half the voltage of the power supply. And then measure the voltage at the collector lead of Q1. This time it is a test play, supply low voltage test first. Cheap & Small hearing aids circuit projectĬustomization and experimentation methods.Video amplifier splitter using transistor.The capacitor C2 is signal-coupling to output and prevents the DC voltage from disturbing the next circuit.Recommended: How to use capacitor coupling Capacitor C1 is a signal coupling on the input and prevents DC voltage or noise-free pulses from the front circuit to this circuit.Therefore use voltage divider circuit with R3, R4 to act as biased of the transistor. The voltage of the base must be higher than the lead emitter. There must be a bias between the lead base and emitter.
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