This circuit shows a Low Current Controlled Battery Charger Circuit using LM723 IC and 2N3055 power transistor. Furthermore, this design mainly gives constant charging current to battery, so battery gets safe charging without over current damage. First, AC supply comes from transformer and then circuit converts it into DC and after that LM723 controls voltage […]
Mini Projects
Simple Diode and Transistor Based Audio Limiter Circuit
This circuit is a Simple Diode and Transistor Based Audio Limiter Circuit and we use it in audio systems where signal level must stay under safe limit. Most power amplifiers require an input signal of around (1Vrms) and if the signal exceeds this level, the amplifier can distort the sound or even damage itself. Audio […]
Easy DIY LM386 Audio Amplifier Circuit
LM386 is a very popular low voltage audio amplifier IC, many hobby users like this IC because it needs only few external parts and it gives good sound output for small speaker projects. In this Easy DIY LM386 Audio Amplifier Circuit, we explain two simple amplifier circuits using LM386 IC, the first circuit gives around […]
Multi-Purpose Audio Preamplifier Circuit using IC TL072
This Multi-Purpose Audio Preamplifier Circuit using IC TL072 is a simple and useful audio amplifier circuit; also, we can use this circuit for microphone signals, AUX audio signals, guitar pickups, music players and other low-level audio sources. Furthermore, the circuit increases weak audio signals to higher level output signals and therefore, the output can drive […]
AF Signal Preamplifier Circuit with LM741 IC
This AF Signal Preamplifier Circuit with LM741 IC operational amplifier which boost very weak audio signal to strong level; also it uses single 12V power supply. Furthermore, this preamp circuit work for microphone, AF input, audio player low output and weak signal source. We can use LM741 IC because it is cheap and easily available […]
Simple LM324 Microphone Amplifier Circuit
Over the past 56 years, operational amplifiers have changed electronics design in a big way and before that time, designers built amplifiers with many separate transistors and extra components and later, companies released op amp ICs that made amplifier circuits smaller, cheaper and easier to build. Furthermore, this project uses the popular LM324 operational amplifier […]