Circuits – White LED Torch

 

This white led torch circuit provides an effective solution for powering white LEDs. It is ideal for flashlights, emergency lighting, and various other applications. The circuit operates efficiently from one or two primary cell batteries.

https://vu3dxr.in/circuits-white-led-torch/

Incandescent Lamp Flasher using IRF510 HexFET

 

The circuit  Incandescent Lamp Flasher in Figure is built around two power FETs, which are configured as a simple astable multivibrator to alternately  switch the two lamps on and off. The R&C values given in the Parts List sets the flash rate to about 1⁄3 Hz. By varying either the resistor or capacitor values almost any flash rate can be achieved.

https://vu3dxr.in/incandescent-lamp-flasher-using-irf510-hexfet/

Simple Incandescent Lamp Flasher Circuit Using 7555 Timer

 

Are you looking for a simple yet effective way to create a flasher circuit for incandescent lamps? This compact and clever design based on the 7555 timer IC offers just that. Designed as an astable multivibrator, this circuit Incandescent Lamp Flasher alternately switches two incandescent lamps on and off, making it perfect for signaling or decorative purposes.

https://vu3dxr.in/simple-incandescent-lamp-flasher-circuit-using-7555-timer/

Single Cell, White LED Torch Fits in a Matchbox

 

 

 

This is the circuit from Chan's website (http://elm-chan.org/works/led1/report_e.html) which I modified and hived off two components. The modified circuit is seen here. The circuit is very robust and it worked with a wide variety of transistors; I tried BC547, 2N2222 and 2n3904. The coil I used had 25 turns each, of 26 gauge wire. Resistor R1 changes the intensity of the light. I tried values between 2KOhm to 220Ohm and I settled for 220Ohm. The light is quite bright at this value.