Hi all.
I'm using a simple transistor switch (see attached) to turn an LED on and off in time with an astable oscillator (connected via the 330k resistor and running at 10Hz). The circuit is part of an audio circuit, so I've had to add a 4u7 cap on the base of the transistor to stop the oscillator ticking feeding through to the audio.
Works fine on the breadboard, but I need to know if I need to add an extra resistor on the emitter to limit the discharge current from the 4u7. Is that likely to be an issue?
I'm using a simple transistor switch (see attached) to turn an LED on and off in time with an astable oscillator (connected via the 330k resistor and running at 10Hz). The circuit is part of an audio circuit, so I've had to add a 4u7 cap on the base of the transistor to stop the oscillator ticking feeding through to the audio.
Works fine on the breadboard, but I need to know if I need to add an extra resistor on the emitter to limit the discharge current from the 4u7. Is that likely to be an issue?
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