I need a little help with a project. I'm very new to building circuits. I have this NE555 duty-cycle pulse frequency adjustable square wave generator module, which I have connected to a 12V DC source. It is working correctly in astable mode.
I have a counter with a signal line that is sending 9V DC and needs to be pulled low to increment the counter. On each pulse of the module, I would like to increment the counter. However I don’t think I can attach the signal line directly to the 555 output as it is sending 9V; do I need a relay? Or maybe I’m wrong. Any assistance would be greatly appreciated. Thanks in advance!