High Power Strobe Circuit Diagram – 20Hz Flash

Description

This design incorporates a significantly enhanced “horseshoe” Xenon tube, generating increased illumination. Furthermore, the flash frequency can be adjusted up to approximately 20Hz. Caution is advised; direct observation of the flash tube whilst the device is active is strongly discouraged!

Circuit Diagram

Printed Circuit Board Layout

Component Placement

Components

R1 250 Ohm, a resistor with a 10 Watt rating.
R2 500K Potentiometer.
R3 680K, a 1/4 Watt resistor.
D1, D2 1N4004 Silicon Diodes.
C1, C2 22 uF, 350V Capacitors.
C3 0.47uF, a 400 Volt Mylar Capacitor.
T1 4KV Trigger Transformer (refer to “Notes”).
L1 Flash Tube (refer to “Notes”).
L2 Neon Bulb.
Q1 106 SCR.
F1 115V 1A Fuse.
Various Case, Wiring, Cord, Knob for R2.

Notes

T1 and L1 are obtainable from The Electronics Goldmine.
This circuit is not insulated from ground; exercise caution when operating without a protective enclosure. An enclosure is mandatory for normal operation. Avoid any contact with circuit parts with the case open or when the enclosure is absent.
Numerous diodes exceeding 250 volts at a 1-amp rating can be substituted for the 1N4004 diodes.
Prolonged operation at high flash rates (exceeding approximately 30 seconds) may cause overheating of C1 and C2, potentially leading to their failure.
The schematic does not include a switch; however, the addition of one is, of course, possible.

circuit from http://www.electronics-lab.com/