Maker Pro
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LM393 failure



Jan 1, 1970
Hi everybody out there !
I'm having problems with a LM393 (open collector output)used as a
voltage controller to a 12V lead battery: when voltage drops below
minimum voltage a
battery-low signal is issued. Connected to the 10k Ohm pull-up
resistor is a cpu-reset push-button, fed in to a flip-flop. What
happens is that somehow, after
a number of reset-button presses, the LM393 shorts its output to
ground even if according to input signal levels I expect it to go
high. So whats the buzz???
Thanks a Ton

Jerry Greenberg

Jan 1, 1970
Obiously on the input or output the current demand is too high, if the
voltages are correct. You must probably add a resistance value
somewhere to limit the current, or check to see is there is any
voltage spiking that must be supressed.

Jerry G.