STROBO, Amedeo Valoroso, xenon strobe light schematic, PC controlled, light controlled, sound controlled

STROBO xenon strobe light

STROBO is a xenon strobe light (stroboscopic light) that can flash automatically or it can be controlled by a PC, by other lights or by a microphone. Please note that the components are grid power supplied (230Vac), hence do not touch them! Please also consider that the xenon lamp is powered by a 600Vdc voltage (at A, K pins) and the trigger voltage (lamp pin 1) is more than 4KV!

Xenon strobe light schematic

STROBO, Amedeo Valoroso, xenon strobe light schematic, stroboscopic lamp, PC controlled, light controlled, sound controlled

I/O:

  • 1, 2 – power input (220-230Vac), please note that components are not insulated, please do not touch them
  • 3,4 – input to trigger a flash (opto insulated, 5-15Vdc)
  • 5, 6 – low power output (12Vdc)
  • S1   – main switch)
  • S2   – internal oscillator ON (enables auto flash)
  • S3   – internal oscillator frequency scale
  • R11 – internal oscillator frequency selection

Auxiliary module 1: it allows to trigger a flash when another flash or sound is detected.

Auxiliary module 2: it allows to connect the xenon strobe light to a parallel PC port to trigger flashes.

Components list, resistors:

  • R1  – 1 KOHM     17 W (it must dissipate heat)
  • R2  – 1 KOHM     17 W (it must dissipate heat)
  • R3  – 5600 OHM    5 W (it must dissipate heat)
  • R4  – 27 KOHM   1/2 W
  • R5  – 1 MOHM    1/2 W
  • R6  – 270 KOHM  1/2 W
  • R7  – 330 OHM   1/4 W
  • R8  – 100 OHM   1/2 W
  • R9  – 1 KOHM    1/4 W
  • R10 – 680 OHM   1/4 W
  • R11 – 10 KOHM logarithmic potentiometer
  • R12 – 1 KOHM    1/4 W
  • R13 – 470 OHM   1/4 W

Components list, capacitors:

  • C1  – 22 uF   350 V or more, electrolytic
  • C2  – 22 uF   350 V or more, electrolytic
  • C3  – 22 uF   350 V or more, electrolytic
  • C4  – 22 uF   350 V or more, electrolytic
  • C1, C2, C3, C4, choose capacitors with high discharge current
  • C5  – 100 nF  630 V polyester
  • C6  – 470 uF  25 V  electrolytic
  • C7  – 100 nF  polyester
  • C8  – 10 nF  polyester
  • C9  – 47 uF   25 V  electrolytic
  • C10 – 470 uF  25 V  electrolytic

Components list, other:

  • IC1  – NE.555
  • TR1  – BC.237
  • SCR1 – TYN.612
  • OC1  – 4N.25
  • D1   – 1N.4007
  • D2   – 1N.4007
  • D3   – 1N.4007
  • D4   – germanium diode
  • DZ1  – zener diode 12 V  1 W
  • S1   – switch (main power switch)
  • S2   – switch
  • S3   – switch
  • T1   – xenon trigger transformer
  • F1   – fuse 250 V  1/2 A
  • LN1  – neon lamp without resistor
  • LP1  – xenon strobe tube

Auxiliary modules components, resistors:

  • R14 – 4700 OHM  1/4 W
  • R15 – 1 KOHM    1/4 W
  • R16 – 10 KOHM   1/4 W
  • R17 – 10 KOHM   1/4 W
  • R18 – 470 KOHM  trimmer
  • R19 – 470 OHM   1/4 W
  • R20 – 100 KOHM  1/4 W
  • R21 – 820 OHM   1/4 W

Auxiliary modules components, capacitors:

  • C11 – 100 nF  polyester
  • C12 – 10 uF   25 V  electrolytic
  • C13 – 220 pF  ceramic
  • C14 – 2,2 uF  25 V  electrolytic
  • C15 – 100 uF  25 V  electrolytic

Auxiliary modules components, other:

  • IC2   – uA.741
  • MIC1  – pre-amplified electret microphone
  • FD1   – photodiode BPW.34
  • DL1   – led diode
  • TR2   – BC.237
  • CONN1 – D connector, 25 poles male (for LPT PC port)

Xenon strobe light PC controller

The original xenon strobe light PC software has been developed in QuickBasic for DOS. It is possible to set a memory array to trigger flashes. Of course you can write your own software, in a modern programming language… simply give 5V to pin 3, 4 of the stroboscopic light.

STROBO, Amedeo Valoroso, xenon strobe light schematic, stroboscopic lamp, software PC controlled, DOS

Project started on: Jan, 1994. Status: just for personal use.

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