So I have built this circuit (attached) and have used it to drive a 7 segment counter circuit. For simplicity, lets assume the counter circuit is a single digit.
It works terrifically, however, I would like to be able to change to higher frequencies by the push of a switch. (make the counter count faster)
I attempted this with a relay configuration; NC (no power to relay) the counter would be connected to (0.5hz), and when the relay is energized the contacts would switch to a higher frequency, say, 4hz.
The issue i'm having is when I energize the relay, the count on the display will skip, and when I de-energize it, it will skip again. I'm assuming this is because of contact bounce, but I can't be sure.
Does anyone know how I might fix this? Could solid state switching be the key? Could the addition of a monostable(s) circuit offer a fix?
Thanks in advance for any advice. http://www.hackersbench.com/Projects/1Hz/
It works terrifically, however, I would like to be able to change to higher frequencies by the push of a switch. (make the counter count faster)
I attempted this with a relay configuration; NC (no power to relay) the counter would be connected to (0.5hz), and when the relay is energized the contacts would switch to a higher frequency, say, 4hz.
The issue i'm having is when I energize the relay, the count on the display will skip, and when I de-energize it, it will skip again. I'm assuming this is because of contact bounce, but I can't be sure.
Does anyone know how I might fix this? Could solid state switching be the key? Could the addition of a monostable(s) circuit offer a fix?
Thanks in advance for any advice. http://www.hackersbench.com/Projects/1Hz/