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Step 4The diode bridge
The second important part in a generator is the "AC-DC" commutator. In other words, the little thing which transform AC into DC.
The diode bridge principle is simple, just type "Diode Bridge" in Wikipedia or in Google. It's real simple system.
But so, no theory just practice here :
The diode bridge is always present under this form :
4 Diodes (tiny black/grey) and capacitator (big blue piece). Try to find it and look for the contacts on the other side. I mean the capacitator have 2 poles + and - , which are in the bottom of the board.
If you get the voltage at diodes poles, the multimeter will show 3 v or 6 v ... because it changes ... at 50 hz !
In some radios or machines maybe you'll find another very little part between diodes, which are "inductors". But, in a simple radio-clock-alarm it doesn't matter.
The diode bridge principle is simple, just type "Diode Bridge" in Wikipedia or in Google. It's real simple system.
But so, no theory just practice here :
The diode bridge is always present under this form :
4 Diodes (tiny black/grey) and capacitator (big blue piece). Try to find it and look for the contacts on the other side. I mean the capacitator have 2 poles + and - , which are in the bottom of the board.
If you get the voltage at diodes poles, the multimeter will show 3 v or 6 v ... because it changes ... at 50 hz !
In some radios or machines maybe you'll find another very little part between diodes, which are "inductors". But, in a simple radio-clock-alarm it doesn't matter.
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