Free Circuit Diagram

This is a programmable voltage regulator circuit. With this circuit we can generate a voltage according to our wishes. This circuit uses L200 IC. Here is the circuit : Potentiometer R2 is used to fix the output voltage Vo. Following equation show value of the output voltage: Vo=Vref (1+(R2/R1)) We [...]

The configuration in the circuit diagram below can be used when a slow rise time of the output voltage is required. We can find the rise time with following formula: ton= CVoR 0.45 Capacitor C is discharged when the switch position is ON and this will maintain the voltage [...]

This low drop out (LDO) voltage regulator need only few components, with very low noise and very low drop-out voltage. The circuit illustrated in the schematic diagram below gives a fixed 2.77 volt output, but this output voltage can be adjusted using two additional resistors. This circuit capable to supply 300 mA load [...]

A DC-to-DC step-up converter is traditionally implemented using transformer, working by converting the DC voltage to AC Voltage, step-up it using transformer, then rectify and filter the transformer’s output to  get a higher DC voltage. Using a switching method, we can step-up a voltage without a transformer. We just need an inductor which is driven [...]

If you are a hobbyist or a professional electronic engineer who make many electronic e]experiment, troubleshooting, or testing, providing wide range variable voltage power supply in your lab or workshop will make your life easier. You can build your variable power supply using linear adjustable regulator, but switching technology let you design a very wide [...]

This switch mode regulator circuit has higher current output than  our previous switch mode regulator, but it uses same controller IC. Up to 10A can be served by this switch mode regulator. The output of this regulator circuit is regulated at 3.3 volt, and the input range is 4-9Volt. The SHDN pin can [...]