What's the connector pinout and voltage to make a DIY external power supply for a Godox flash?
Photography Asked by marcel3032 on September 24, 2020
I want to make an external power supply for my Godox TT685N, and I have two questions:
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There are 3 pins on the connector (I found, that this is same conector like Canon) What is the pinout of this connector?
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I found that the voltage on this connector is about 300V. Is this correct?
2 Answers
Yes, the voltage is approximately 300 volts and here is a diagram showing the pin connections:
You can buy a complete unit for as little as $27. It doesn't make sense to try and design your own. The have complex electronics inside.
Correct answer by Mike Sowsun on September 24, 2020
The flash works by discharging a capacitor into a xenon tube, when ionized by a very high voltage pulse to allow conduction. The energy, E, stored in a capacitor is E = CV²/2. Because of the square factor, it's much more productive to increase V (volts) than C (capacitance). With C = 750 µF, V = 283 Volts, you get the 60 Joules of a typical high end cobra flash.
Answered by Luc Van Laethem on September 24, 2020
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