The timer will send a square wave at a rate of between 12Hz and 245Hz (20 - 200 was my goal, to emulate 600 - 6,000 rpms).
Besides my 5v output I've also got an LED in the circuit, however the LED blinks too fast. At approximately 12Hz you can tell it's flashing (vs. solid on) but at anything higher you can't tell if it's 50 or 150 Hz.
What is the simplest way to cause there to be 1 LED pulse for every 10Hz on the square wave? I'm going for:
Code: Select all
LED off pulse 1 pulse 2 ... pulse 10 LED on pulse 1 pulse 2 ... pulse 10 LED off
It doesn't have to strictly be 10, by the way. If it's easier to do 8 or 16, that is fine. I have a bunch of 74HC parts, also I have some shift registers. I have a spare 555 timer and more resistors and capacitors than you can shake a stick at. I think I have an Atmel 24c02 eeprom too.
You know my end result - I have the 555 timer circuit already bread boarded, but if you know a better way to make my pseudo ignition coil that will produce a pulse in the range of 20 - 200 Hz (doesn't even need to be square) and allow blinking of an LED at a 10th of that value, I'm open to suggestions.