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Single Li-Ion / Li-Polymer Battery Charger

January 23, 2013 By: admin Category: Analog, Basic No Comments →

MCP73837-based Battery Charger

The MCP73837 and MCP73838 based charger is suitable for portable applications. It is fully integrated linear Li-Ion / Li-Polymer battery chargers with autonomous power source selection. It has small physical size and only need low number of external components to make it works. The MCP73837 support Power-Good Monitor while MCP73838 has Timer Enable feature.

Remote Control Tester

June 18, 2012 By: admin Category: Remote, Renesas No Comments →

Remote Control Tester Hardware

The purpose of this project is to build a device that can capture the Infrared (IR) signal transmitted by all types of remote controls. It can capture IR codification signal at the modulation frequency level. This device not only simply captures IR signal, it also can decode this IR signal. Telling us what codification is […]


HT8950 Robot Voice Generator

February 24, 2012 By: admin Category: Audio, Miscellaneous, Project No Comments →

Robot Voice

This project shows you how to build a robot voice generator with IC HT8950, a powerful voice modulating IC. The circuit has Robot function, Vibrato function and 7-step level shifting pitch. The construction is extremely simple and the unit is very small.

XR-2206 Function Generator

February 16, 2012 By: admin Category: Basic, Digital, Miscellaneous No Comments →

Function Generator DIY

If you want to build simple function generator then this circuit is for you. This function generator is built based on IC XR-2206. It can be used to generate Square, TTL, Sine and Triangle waveforms. The frequency range is from 1Hz to 1Mhz and adjustable via VR3. User can change output voltage using VR2.