Quote:
Originally Posted by Old Tele man
No, it's the COMBINED voltage drops [ 0.7VDC(diode) + 2.0VDC(led) ] that set the VOLTAGE that is maintained across the capacitor that the diode & LED are in parallel with. Both devices are needed; it's the series summation of their voltage-drops that's supposed to ħequal the capacitor's 2.7VDC working voltage.
As stated earlier, all the LEDs+diodes COULD be replaced with precision resistors, but would likely NOT be as precise in voltage balance across each individual capacitor...the LED+diode combination has much tighter variance.
|
Good info, thanks. I have one problem in my mind: could you easily burn those diodes if capacitor(s) is badly out of balance and charging current is high?
And when the diodes die, capacitor is next...