Instructables

how do the DC transformers in camera flash circuits work?

i mean they convert 1.5 volts into about 300. Does another component on the circuit board convert it to AC or something? i notice the secondary side of the transformer has an extra pin...

Rainh2o5 years ago
They pulse the DC through the transformer and charge a capacitor basically
lemonie5 years ago
There is a circuit which sends pulses through the transformer, it's AC in the sense that it alternated between zero and something. If you plug "joule thief" into the search box top right you might get a better idea. L
Yes, you're quite right, there is no such thing as a "DC" transformer. There IS an oscillator, built around the primary which pumps energy through the transformer