by SScnc » Fri Feb 24, 2012 12:10 am
Thanks guys, glad you like it. I like the idea of the LED bargraph, I've made a few of them in the past using LM3915's (or 14's), I'll have to check into doing it with a PIC with max persistence. Great idea! I'm using a PIC 16F88 for this LCD that has several ADC channels, if you have any info that can help with that, please pass it along to me.
Tim, I'm happy to provide whatever info about this that you'd like,it's just a basic counting procedure that counts the number of pulses from the flow sensor then does a simple "LCDOUT" to display. Also in the loop is the temperature code that reads the temp info from a DS18B20 sensor (that is glued to the brass fitting) and displays that on the second line. It's not perfect, the flow sensor wheel turns a bit slow so there's only about 3 to 4 pulses per second so the display only reads about 75% to 100%, anything less than 75% is considered low or no flow. That's the only way I know of to do it though. just tell me what you want to know more about.
BTW: I milled the panel on my CNC router then heavy black powder coated it, then put it in the laser and engraved the letters. Then I filled the engraved letters with silver paint. You can't really tell it but the DSP panel is flush.
Steve