hello, I want to make a square wave generator with a variable frequency range between 1 and 10Hz. The pulse is between 0 and 5V and a 50% duty cycle. I'm going to use this to interface with some logic chips, my question is, what's the best circuit for this job? In terms of low part count, and inexpensive. Right now I've built a 555 Astable circuit and I pass this through a buffer, but the 50% duty cycle is hard to achieve, and I don't know if the 555 is the best approach.
much thanks