Xenon Strobe CIRCUIT 1
The circuit used to come in kit form with a surplus supplier, but it is probably more available. It shows some new concepts such as using a 555 as a pulse width modulator (PWM), and serial / parallel processors flash camera.
The 555 is mounted as a pulse width modulator (from the (low) time to be determined by the regulator). The output on pin 3 is connected to the gate of P-channel MOSFET (IRF9Z20) through the 100R resistor to prevent parasitic oscillation of the transistor. A low signal on pin 3 causes the MOSFET to turn, so the button controls the flash output and a bit rate, by varying the duty cycle of 555 and in turn the MOSFET.
Xenon Strobe CIRCUIT 2
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