Discrete component sound and light control stair delay switch circuit (2)

It is a split-core component sound and light controlled stair delay lighting using a one-line connection method . The light
switch is also the same as the seven-sided base switch. The main purpose is to replace VD5 with a light-emitting diode 1, EI), which is used There are instructions to
turn on the spell and turn it into faintness. When sometimes
the voice control is not sensitive enough , you can flick the switch
with your hand .
When the old microphone is shaken, it will output a strong signal enough to turn on the light. The microphone amplifier wri connection method of this circuit is slightly different. It directly uses the frequency-occupied iL current output by the crucible as the base bias current for secondary operation, and the actual measured results are also very good.