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
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
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: […]
Simple Adjustable Frequency Square Wave Generator Circuit
Simple Adjustable Frequency Square Wave Generator Circuit is easy and flexible. It is used in signal processing, modulation and in many projects. Here we see variable frequency oscillator using 555 timer IC which makes square waves and where user can change frequency. 555 works in astable mode and turning potentiometer changes output speed. Circuit is […]
Simple Sawtooth Wave Generator Circuit
Simple Sawtooth Wave Generator Circuit is used in oscilloscope, TV, function generator and PWM. IC 555 is very common and is easy to make sawtooth. Voltage goes up slow and drop fast in sawtooth shape. Frequency changes with potentiometer. Circuit works with 5V to 15V. Circuit Working: Parts List: Component Value/Part Number Quantity Resistor 2.2k […]
6V DC Motor Speed Controller Circuit using IC CD 40106
This 6V DC Motor Speed Controller Circuit using IC CD 40106 controls 6V DC motor speed. Change speed by change in duty cycle of input voltage. Circuit is cheap, easy, good for toy motor, small fan and blower. Main part of this circuit is IC CD 40106 Schmitt trigger inverter which makes PWM signal. PWM […]