Gang..
this should be simple.
A basic two 4026 counter/display ICs counting pulses from a switch. When the output goes to 99 then 00, I take the carry out and trip another counter. that's working perfect.
now, when power is first applied to the circuit, the reset line (s) are pulsed high, and the counters reset to 00
okay, with me so far?
But when I push my reset button, that applies +12 to the reset pin, one display goes to 0 the second on to 1. If i hold the reset button in, both displays show '00' release the button and I get '10'
I've tried all sorts of interface to prevent switch bounce, such as a trigger from a 555, more debounce circuits that I can shake a stick at, and yet, they all seem to produce the same result——10 instead of 00.
This seems to simple, yet is confusing the snot out of me, so in one basic word----
"HELP!"
Qrper
this should be simple.
A basic two 4026 counter/display ICs counting pulses from a switch. When the output goes to 99 then 00, I take the carry out and trip another counter. that's working perfect.
now, when power is first applied to the circuit, the reset line (s) are pulsed high, and the counters reset to 00
okay, with me so far?
But when I push my reset button, that applies +12 to the reset pin, one display goes to 0 the second on to 1. If i hold the reset button in, both displays show '00' release the button and I get '10'
I've tried all sorts of interface to prevent switch bounce, such as a trigger from a 555, more debounce circuits that I can shake a stick at, and yet, they all seem to produce the same result——10 instead of 00.
This seems to simple, yet is confusing the snot out of me, so in one basic word----
"HELP!"
Qrper