hi, i'm working with some high school students, we're trying to build an automatic school bell circuit that i got online.
The circuit used a 555 to generate a 4.5min interval pulse, and 2 decade counter to set the time for 9 periods.
HOwever, the school has 12 periods, meaning a single decade counter that work for it.
Any suggestions that could help?
The circuit used a 555 to generate a 4.5min interval pulse, and 2 decade counter to set the time for 9 periods.
HOwever, the school has 12 periods, meaning a single decade counter that work for it.
Any suggestions that could help?