Power Supply Circuits

DC-DC Inverting Converter Circuit for 15V Output is of special type of circuit which changes positive voltage to negative voltage. This circuit is useful for things which need negative power like op-amps, analog and communication devices. The circuit uses uA78S40 IC and a switching regulator. It takes +15V DC in and give -15V out and […]

Switching Regulator are small circuit and easy to underderstand. They take little energy pieces from input and send it to output step by step. They turn power transistor ON and OFF fast and this controls voltage good. Different from linear regulators they do not waste energy as heat. They use parts like inductors, capacitors, diodes […]

Switching Regulator Circuit using IC uA78S40 is called a buck converter. It change high input voltage to lower output voltage with smartly and easily. IC uA78S40 chip is good for power supply. It has built-in parts like voltage reference that change with temperature, oscillator for duty cycle, strong switch, separate op-amp and its own diode. […]

Transformerless 12V Switching Power Supply Circuit is small, smart and with no big transformer. It changes high AC to steady low DC using fast switch. Circuit is lightweight, good for low power, embedded, IoT and for industrial control. This circuit requires 12V 120mA output and works with 85 to 230V AC and uses LNK304 IC. […]

Simple Time Delay Circuit for DC Power uses SCR. It is very useful in many uses and is easy to understand. Need wait before device ON? Then this circuit gives delay after power ON. Circuit is good to turn devices one-by-one and avoid current spike. Max input DC for this circuit is 24V. Circuit Working: […]