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 LED Flasher
Audio circuit
Audio circuit using 12AX7, 2x6BQ5, EL84 Audio circuit using 12AX7, 2x6BQ5, EL84
Battery Charger circuit
Battery Charger circuit using LM317, BC548
Stereo Tone Control
Stereo Tone Control using fet 2SK30 and Tr A561, C734 Stereo Tone Control using fet 2SK30 and Tr A561, C734
InPowered battery charger circuit
InPowered battery charger circuit diagram schematic 6V-12V using NE555, LM7812, 2SA671, 1N4002, BC549 auto battery charger circuit On a lithium-ion cell, 3.8V/cell indicates a state-of-charge of about 50%. It must be noted that utilizing voltage as a fuel gauge function is inaccurate because cells made by different manufacturers produce a slightly different voltage profile. This […]
