I finally rebuilt my BOSOZ power supply ....dual mono with 60 volt rails. Essentially the BOSOZ articles circuit. Seems to work fine, need to use a scope tommorow.
I forgot to put a on/off LED on the front panel and now Im wondering the best way to implement the LED. Im not sure if a voltage coverter/series resistor tapped off on only one rail is the way to go.
This dumb *** is very open to suggestion
Thanks
I forgot to put a on/off LED on the front panel and now Im wondering the best way to implement the LED. Im not sure if a voltage coverter/series resistor tapped off on only one rail is the way to go.
This dumb *** is very open to suggestion
Thanks
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why not
with nowadays bright LEDs, ZM's Thumb'o'Rule is 1K per supply V
so, 56K to 62K
(Ubat - Uled)/Iled = Rseries.
Why calculate? Because LEDs of different colors have different Uf and different current requirements. Red/amber/green ones about 1.6...1.8V and white/blue/purple ones about 3.3V. Today's white/blue/purple LEDs are already bright with just 1 mA but the normal green/amber/red ones need 2.5 mA.
So it all depends on what color is used and more so if one uses various colors and desires the same intensity. Or if one wishes to have the LEDs having the same intensity as the LEDs of other devices. Or to have a standard brightness and implement that in all available devices for uniformity...
As an example and to understand you could calculate the resistors for a blue LED (3.3V, 0.001 A) and for a green LED (1.8V, 0.0025 A) and 60V Ubat.
BTW a few windings of isolated wire around one of the existing toroids are enough to let a red/amber/green LED (with series diode) shine. With just the right amount of windings a series resistor can even be omitted although limiting current is normally a necessity.
Why calculate? Because LEDs of different colors have different Uf and different current requirements. Red/amber/green ones about 1.6...1.8V and white/blue/purple ones about 3.3V. Today's white/blue/purple LEDs are already bright with just 1 mA but the normal green/amber/red ones need 2.5 mA.
So it all depends on what color is used and more so if one uses various colors and desires the same intensity. Or if one wishes to have the LEDs having the same intensity as the LEDs of other devices. Or to have a standard brightness and implement that in all available devices for uniformity...
As an example and to understand you could calculate the resistors for a blue LED (3.3V, 0.001 A) and for a green LED (1.8V, 0.0025 A) and 60V Ubat.
BTW a few windings of isolated wire around one of the existing toroids are enough to let a red/amber/green LED (with series diode) shine. With just the right amount of windings a series resistor can even be omitted although limiting current is normally a necessity.
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