How to create a dual power supply unit using a single battery for your lab purpose? Dual voltage power supplies are required particularly for op-amp experiments and some of the instrumentation amplifiers. Some low-power audio preamplifiers also use a dual voltage supply. Here is a simple dual power supply schematic capable of producing +9V, 0V, and -9V (dual … [Read more...] about Regulated Dual Power Supply Circuit From Single Battery Source
Using 555 Timer
Simple Electronic Random Number Generator Circuit Using 555 and 4026
Electronics is all about fun if you know how to enjoy it, you can make big things happen with simple logic. Here is another simple and entertaining circuit for electronic hobbyists. This simple game circuit will randomly generate a single-digit number upon pressing the push button. You may predict a number and press the button and check if it’s correct or not. This can be … [Read more...] about Simple Electronic Random Number Generator Circuit Using 555 and 4026
Heartbeat Monitor Project Circuit with Tachycardia Alarm
The present Medical Electronics deals with many technologies like ECG (Electro Cardio Gram), EEG (Electro Encephalo Gram), Cardiac monitors, etc. Almost all multispecialty hospitals equipped with modern technologies are coming from Electronics.Let me introduce here a heartbeat monitor project that can monitor the heartbeat and displays in … [Read more...] about Heartbeat Monitor Project Circuit with Tachycardia Alarm
How to Make a Burglar Alarm Circuit for Your Home Security?
These days home security systems are given great importance everywhere. However, these security automation systems are very expensive to implement. Here I will help you to make a simple IR security system on your own using an Infrared-photodiode pair. Earlier we had already published another intruder alarm circuit diagram which was based on LASER and LDR. However, … [Read more...] about How to Make a Burglar Alarm Circuit for Your Home Security?
Automatic Rain Sensing Wiper System Using 555 Timer
Have you seen Audi, Lexus, or Ford automatic rain-sensing wipers and wondered how they work in these vehicles? They are handled by sensors at the center of the windscreen which detect rainwater and turn the wiper motor on. Here is the working of rain-sensitive wipers with a circuit schematic. The main component of this circuit is a 555 timer IC that works in monostable … [Read more...] about Automatic Rain Sensing Wiper System Using 555 Timer