DC-DC Inverting Converter Circuit for 15V Output is of special type of circuit which changes positive voltage to negative voltage; also, 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 and it takes +15V DC in and give -15V […]
Power Supply Circuits
Understanding Switching Regulator Circuit
Switching Regulator are small circuit and easy to understand, as they take little energy pieces from input and send it to output step by step; then they turn power transistor ON and OFF fast and this controls voltage good. Also, they are different from linear regulators as it do not waste energy as heat. In […]
Switching Regulator Circuit using IC uA78S40
The Switching Regulator Circuit using IC uA78S40 works as a buck converter that smartly and efficiently reduces a high input voltage to a lower output voltage. Also, IC uA78S40 chip is good for power supply and it has built-in parts like voltage reference that change with temperature, oscillator for duty cycle, strong switch, separate op-amp […]
Transformerless 12V Switching Power Supply Circuit
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 and also this circuit requires 12V 120mA output and works with 85 to 230V AC and uses […]
Simple Time Delay Circuit for DC Power
Simple Time Delay Circuit for DC Power uses SCR and 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; also circuit is good to turn devices one-by-one and avoid current spike. Also, the max input DC for this circuit […]
Simple Mains Powered LED Light Circuit
Simple Mains Powered LED Light Circuit runs on 230V AC mains; also it uses capacitor dropper to limit the current. Moreover, LEDs in series-parallel are cheap and easy for mains lighting and they are with bright white light and no big transformer; furthermore, it is good for low power light needs. Circuit Working: Parts List: […]