LM317T Voltage Regulator with Pass Transistor

Second video. This is a microcontroller driven led mod with low voltage alarm, for silverlit xtwin (super light rc airplanes). It is a work in progress. The item shown is crude lab prototype on a breadboard. probably only interesting to those who knows what it is. The ic to the left is a voltage regulator to drive the circuit. The ic to the right is a microcontroller, programmed to blink a white, red and green led in a certain pattern. The microcontroller also monitors the battery voltage and changes the blinking pattern if the voltage drops below a certain threshold. This way the pilot can be alerted in time and land safely before the battery dies. The state of this project is ready. The finished prototype can be seen below the breadboard, the small pcb with three wires coming from it.



http://www.youtube.com/watch?v=V2aCIBus02M&hl=en