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Circuits designed by David Johnson,
P.E.
Last Updated on:
Thursday, March 22, 2012 06:08 AM
Master Category List -
Dave's Circuits
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Xenon Lamp
Circuits |
- 9v POWERED XENON
PHOTOFLASH Controller
This 9v battery powered circuit is designed for remote control flash needs.
A charge control circuit turns off the high voltage generator when the
photoflash capacitor is fully charged. A neon lamp is included to indicate when
the system is ready to flash.
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- LINE POWERED XENON FLASH
TRANSMITTER
This line powered xenon flash circuit drives a small camera type flash tube. It
has an optical isolator to allow the flash to be safely triggered from some remote
device. A flash rate of 2Hz is possible with the circuit.
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- Xenon Lamp Flash
Amplifier
This circuit has a very low standby current requirement yet has very high
sensitivity toward the light flashes from a xenon lamp. When connected to a
flip/flop it can serve as an on on/off Controller.
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XENON LAMP FLASH DETECTOR
This circuit uses a small 2.5mm square photo diode in conjunction with a 100mH coil
to detect the short light flashes from a xenon lamp. The coil makes the
circuit immune to normal room lights. Its 10mv sensitivity can detect light
flashes from a range of over 100 feet. Reflections from a room’s walls and
ceiling is usually enough to trigger the circuit. The entire circuit draws
only 3 Microamps from a 6 to 9 volt battery.
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