If you search for LED chaser circuits online, almost all of them show one single LED lighting up and moving across a line. That classic effect looks fine but if you flip the logic around, then you get something way more interesting, which is a running dark dot chaser effect. Instead of one glowing light […]
Newly Updated Circuit Projects:
Capacitive Dropper Calculator Tool for Transformerless Power Supplies
A capacitive dropper is one simple method used in some transformerless power supply circuits. In this method a capacitor is connected in series with the AC supply to limit the current going into the circuit. This calculator helps us to find the theoretical capacitor value according to the input AC voltage and required current. Capacitive […]
Capacitive Voltage Divider Calculator
This capacitive voltage divider calculator helps us to find the C1 and C2 capacitor values for dividing an AC input voltage into a lower AC output voltage. We just have to enter the input AC voltage and the required output AC voltage. We also have to enter the AC frequency and the assumed AC current […]
Basic 555 IC Inverter Circuit Diagram Explained: 12V DC to 220V AC
In this post I will explain a very basic 12V to 220V AC inverter design using IC 555 as the oscillator stage, for generating a 50Hz frequency to the MOSFET driver stage of the inverter. We have used a center tap transformer for this design which effectively converter the battery 12V into 220V AC 50 […]
Pure Sine wave Inverter using IC 555
In one of my earlier posts we elaborately learned how to build a SPWM generator circuit using an opamp and two triangle wave inputs, in this post we use the same concept to generate the SPWMs and also learn the method of applying it within a IC 555 based inverter circuit. Using IC 555 for […]
Modified Square Wave IC 555 Inverter Circuit
The proposed IC 555 based modified square wave inverter circuit generates accurately spaced PWM pulses which imitates a modified sine wave very closely and thus can be considered as good as its sine wave counterpart design. Here we use two stages for creating the required PWM pulses, the stage comprising the ICs 741 and the […]