Constant Current Regulator Circuit Diagram This fixed 1-mA current source delivers a fixed current to a load connected between Q1'...

Active Antenna Circuit Schematic This circuit is designed to make a short pull-up aotenna perform like a long wire aotenna, while off...

Switch Mode Voltage Regulator Circuit Diagram Switch-mode power supplies offer the benefit of a much greater efficiency than obtainab...

Short circuit protection circuit diagram Short circuit protection circuit diagram Circuit Description When Sl is pressed, the coil ...

5 volt variable power supply circuit  Circuit Description Although linear-regulator !Cs are frequently used in variable power-supply ...

12V Power Supply Circuit Diagram 12v power supply circuit Description This 12-V power supply is easy-to-build, and it produces a ...

Low battery indicator circuit diagram Description The sensing circuit consists of a 741 op amp set up as a voltage comparator, usin...

This audio power amp (built around an LM383 8-W, audio power amplifier) can be used to boost an audio signal to a sufficient level so that i...

AC/DC converter circuit A de level is produced that corresponds to the ac input rms value (if sine wave). i; set the gain of IC2 to 1.1...

This high-performance charger quickly charges gelled lead-acid batteries, and turns off at full charge. At first, the charge current is held...