Varied
Mini drill revolutions, speed regulator circuit
With the help of this revolution regulator circuit you can control the number of revolutions of your drilling machine.
After you finish construct this mini drill revolution regulator measure the output voltage. First rotate P2 to the right completely, P1 to the maximum. Now the measured voltage must be 20% less than the maximum allowed [...]
Rotative speed regulator borer, driller controller
This rotative speed regulator circuit schematic allows to control the holing speed of your borer or driller machine. This project is based on the fact that if the load grows, the voltage decrease and current increase. Use this circuit to control the speed of revolutions of your drilling mill or bench drill.
Mini audio compressor schematic
This mini audio compressor circuit use only one active component T1. The audio signal goes thru C1, R1, D1, C2, R3. Still a part of audio signal charge the D3/D4 detector and creates a control voltage for T1.
The fading time depends on C4 and R5. With an audio input variation of 50dB, the output signal [...]
