Circuit Lake

Electronic Project and Circuit Collection

Analog


FM Wireless Microphone

October 12, 2009 By: admin Category: Analog, Transmitter, Wireless No Comments →

This FM Wireless Microphone project has good frequency stability and has range over 1 Km (under good conditions). This project features RF amplifier buffer (10dB gain), an AF preamplifier to boost the modulation and good microphone sensitivity. You can use it for guitars and remote control system. This project quite simple to build. The two […]

Simple Sound to Light Display

September 29, 2009 By: admin Category: Analog, Audio, LED, Project No Comments →

This is mini sound level monitor project. It will display fluctuating light bars as response of audio signal from Electret Microphone. The louder sound that come into this device, the brighter the light bar. This project use alkaline battery as power source. The ‘brains’ of this project is a LM358 general-purpose op-amp. The front part […]

Electronic Batteryless Dice

June 21, 2009 By: admin Category: Analog, Game, Project No Comments →

The project will shows you how to build an electronic batterless dice. As the tube is shaken, the magnets traverse the length of the tube back and forth, thus changing the magnetic flux through the coil and the coil therefore produces an AC voltage. The muscle powered voltage generator is based on Faraday’s law, consisting […]

40W Power Amplifier for FM Broadcast

June 10, 2009 By: admin Category: Amplifier, Analog, Transmitter No Comments →

If you want to boost the output power of your low power FM broadcast band exciters then you can try this project, 40W broadband VHF RF Power Amplifier. The amplifier design is based on the recently introduced (1998) Motorola MRF171A MOSFET. The initial feasibility was performed using a linear RF and microwave simulation package, specifically […]