Monthly Archives: June 2010

Animated LED for Bike Turning Signal

Posted on June 21, 2010 by Rust
Animated LED for Bike Turning Signal

Using circuit below, we can animate the bike turning signal using LED. The bike turning signal will blink from the right side (D1) to the left side (D5) in a bar style. To build a complete left and right turning … Continue reading →

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Two Transistors Lead Acid Battery Monitor

Posted on June 19, 2010 by Rust
Two Transistors Lead Acid Battery Monitor

The circuit of battery monitor below uses 3 separate LEDs. Voltage level between 6v to below 11v will turn the red LED on and will turn off above 11v. Between 11v and 13v will turn the orange LED on and … Continue reading →

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Single Transistor Lead Acid Battery Monitor

Posted on June 17, 2010 by Rust
Single Transistor Lead Acid Battery Monitor

Using a dual-colour LED and few surrounding components, we can make a very simple battery monitor. This battery monitor circuit is suitable for  monitoring your car battery, enrich your dashboard with cool and functional accessory. Orange colour is produced by … Continue reading →

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