Search
OP-amp - search results
Cable Tester
Have you ever wondered if a particular cable is delivering mains power supply to your device or not? Here is a solution that helps...
Relay Actuating Circuit with Millivolt Sensitivity
Common electromagnetic relays with coil voltage of 5V, 6V or 12V can operate power circuits in the range of 250 to 300 volts and...
Audible Logic Probe
Using a conventional logic probe, it is difficult to determine what is happening at a point in a circuit above 50 Hz. The human...
Simple Water Temperature Indicator
When bathing a baby, it’s important that the water is neither too cold nor too hot. You test the water by dipping your fingers...
DC Motor Control Using PWM
Small DC motors are efficiently controlled using pulse-width modulation (PWM) method. The circuit described here is built around an LM324 low-power quad-operational amplifier. Of...
5 Tips to Engineer Your Career
Last month, the idea about this article came to my mind just after watching the movie 3 Idiots. By now, I guess you haven’t...
PEAK LEVEL MONITOR
Measurement of peak level is useful while testing an amplifier or a similar device. It is handy while testing a logic circuit, as it...
Milliohm Meter
Milliohm meter is used to check low resistance of connecting wires. It can deduce the resistance of thick wires, condition of contacts and the...
Nano-Ampere Meter
This circuit can measure currents down into the nano-ampere range. It is useful when building, testing and experimenting with low-power circuits, especially those operating...
LASER-BASED INTRUDER ALARM
You can use this laser-based intruder alarm conveniently at the entrance of a hall or any other similar location to protect the same from...
