i am using a constant current source (see below) as a simple charger. this was posted before and somebody suggested that c4 be removed and i did that in the actual circuit. input is 18v @ 1A dc. output is 500mA or 750mA to charge 2 up to 8 AA cells in series.
i need a charging light that will indicate good contact between the cells and the charger. it has to keep the led at 20mA even when the number of cells at charge is varied. i have thought of the second circuit, in series with the cells, but i think it will work only for a known number of cells, if it will work at all.
thanks in advance.
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View attachment 38941
i need a charging light that will indicate good contact between the cells and the charger. it has to keep the led at 20mA even when the number of cells at charge is varied. i have thought of the second circuit, in series with the cells, but i think it will work only for a known number of cells, if it will work at all.
thanks in advance.
View attachment 38940
View attachment 38941
