Schematics of delabs

This is a mains 230V AC voltage indicator and is a LIVE CIRCUIT, so take care. The Resistor has to be a fusible ceramic wire wound and the capacitor 630V AC or higher capacity. More at my Home Made Circuits. This circuit has been drawn from my… more »

This is a mains 230V AC load current indicator and is a LIVE CIRCUIT, so take care. The Resistors have to be a fusible ceramic wire wound. More at Mains Voltage and Power Circuits This circuit has been drawn from my memory and i have not tried it out… more »

This is a phase angle control of a Triac which is a evolution from an SCR. The 50 Hz or 60 Hz Sine wave of mains can be turned on at any point after the Zero Crossing. Design Notes - Power Electronics - 03 The Voltage ramps up in the sine wave which… more »

The circuit uses opto-coupler MOC3041 of Motorola and the Triac BTA16-600 of STMicro as a solid state switch or relay. Four Switches boost or buck the mains voltage, keeping output within limits. It also uses the LM324 quad opamp from National… more »