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Welcome to CircuitLib.com, the Electronic Circuits Library. Let’s share our Knowledge with hobbyists, individuals, groups and students as widely as possible! Navigate to our pages and discover many novel electronic circuits. The electronic library is regularly refreshed with new circuit schematics, complete electronic projects, tutorials and links for junior and senior courses in electronics engineering. We emphasize on constantly working to produce innovation and present new knowledge, ideas, and vision.
Digital FM radio
This is an FM stereo receiver based on Arduino and the TEA5767 IC. The radio displays information regarding the received frequency, the type of demodulation (monaural or stereo), and the received signal strength. It has a memory capacity of 10 radio frequencies and an additional default frequency definition memory index. The frequency range can be either from 87.5 to 108MHz (US / Europe) or from 76 to 91 MHz (Japan).
Arduino LCD VU-meter
We use an Arduino Uno board, a classic 2x16 alphanumeric display, an MCP6022 operational amplifier, some passive components and some lines of code, in order to make a stereo VU-meter. The audio level is displayed logarithmically in two bar-graphs on the LCD.
Digital Weekly Programmer
1.5 GHz Frequency Counter
0-999 sec Timer
The specific count down timer was initially designed for a UV-Exposure Unit. However, it proved to be extremely useful for providing controlled "on" times for other equipment such as photo-enlargers, developers, small heaters, incandescent lamps, fluorescent lamps, etc.
Audio Spectrum Analyzer
This is a real time LED Audio Spectrum Analyzer. You can embed this unit in an audio system or use it as a stand-alone unit. The LED Spectrum Analyzer can display a real-time bar-graph spectrogram...
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