The Door Guard Knob Alarm circuit with touch system. When thief caught on door handle, makes alarm once. Use the the detector capacitance within the body.
Do you love music? Imagine we can build power amplifiers system. Sound good, doesn’t it? Here are many circuits. For example, about Audio amplifiers, bridge amplifier, Using transistor or IC or MOSFET, Mixer, Graphic Equalizer, Preamplifiers. And, Sound generators, tone controls, Melodies, Sirens, Animal sound, effect voices. Even, Burglar alarm, and more. I cannot explain to you all. But sure I do not like to see you miss them.
A application a Signal amplifier circuit diagram with set input-output ratio, specifically the AC signal amplifier in common electronic circuits.
This is the cheap fire alarm circuit that Use principle of infrared sensor smoke. When cause events fire. The principle is simple and affordable.
This is complete stereo amplifier circuit 60W +60 W without customize. Which is easy to build , sound quality, and cheap because the LM3876 works perfect. [...]
This is a create special 3D stereo sound circuit. Which sound is a dimension to the listening. Using the some low frequency to appear out left and right
Suitable for beginners. Build a simple, but widely applied.
This is a car audio amplifier circuit that has high power over than 50w Using the IC TDA1562Q Philips. Which It uses just 12 volts power supply only.