This page features a replacement circuit for the LM3909 LED Flasher / Oscillator using discrete components. The circuit is functionally the same as the integrated LM3909 but has a minor variations in values of the components used. If you like to use the integrated circuit LM3909 build be Flasher Circuit. But may get into trouble […]
Posts tagged LM3909
Where can I get TV circuit diagram to repair my own TV? Can’t seem to find it on the find on the web?
SukhdevS asked: The model is Sony Trinitron KVJ14P1S (14 inch). I stay in KL, Malaysia.
Relay Driver Control circuit
Relay Driver Control circuit using NE555, 741, 1N4001, SL100, D313, C106
Switching driver Circuit
Switching driver Circuit using 2N2222, Relay, LDR
Circuit and Making Schema Alarm LED – speaker – remote – radio – for Car
I decided to build a compact, yet effective alarm. My demands were:- simple construction, reliable operation, very small power consumption, and, most of all, small size. I started with CMOS logic gates, but was soon forced to abandon the concept after a few unsuccessful attempts. Then I suddenly realized that a simple transistor switch might […]
