Circuit Lake

Electronic Project and Circuit Collection

Analog Related Resources


7 Watt Audio Power Amplifier, TDA 2003

October 09, 2012 By: admin Category: Analog, Audio No Comments →

This small amplifier is built based on TDA2003 IC. It can deliver 4Wrms at 4ohms. The TDA 2003 has improved performance with the same pin configuration as the TDA 2002. TDA 2003 keep maintained additional features of TDA 2002 such as very low number of external components, ease of assembly, space and cost saving.

555 TV Remote Control Jammer

October 04, 2012 By: admin Category: Analog, Miscellaneous No Comments →

If you want to watch your own TV program and don’t want anyone disturb your watching time by changing the channel via remote control, try build this simple circuit TV remote control jammer. The circuit uses 555 IC timer to generate 38 kHz signal and IR transmitting Diode (IR emitter) to transmit the signal. When […]

Li-Ion Battery Charger and Load Sharing System with MCP73837

October 04, 2012 By: admin Category: Analog, Tutorial No Comments →

Batteries often serve as the main energy source for portable electronic devices. Although they depend on batteries, portable consumer electronic products, such as GPS devices and multi-media players, often consume energy directly from an ac-dc wall adapter or accessory power adapter (or “Auto Adapter”) when the battery is low or the device is in a […]

Simple DC Dummy Load

September 26, 2012 By: admin Category: Analog, Measurement, Miscellaneous No Comments →

This project shows you how to build a simple constant current sink which can be used to simulate a DC dummy load. It can help you test cheap DC-DC converters to see if they really put out the amount of current as advertised. The circuit is quite simple, a voltage follower or buffer using opamp.