Motors
Motor speed control
This motor speed control circuit uses only seven components to regulate the speed of a motor. Simple and very cheap to contruct. This circuit controls the speed of a motor from 0 to 50 % of its nominal power. Resistor R1 and potentiometer P1 divide the positive halfwave swing of the line voltage. During [...]
Drill speed regulator
A mini-drill machine is always needed in drilling the printed circuit board. It is usually powered by batteries that limit the drill’s capacity.
Using a power supply adaptor with a speed regulator like the one featured here can certainly improve the performance of the drill.
The speed regulator can maintain the speed of the drill no matter [...]
Motor speed regulator with triac
This triac-based motor speed regulator is designed for controlling the speed of small household motors like drill machines. The speed of the motor can be controlled by changing the setting of P1. The setting of P1 determines the phase of the trigger pulse that fires the triac.
The circuit incorporates a self-stabilizing technique that maintains the [...]
