- it's somehow related to making beer. Aren't we lucky that here on this forum we just make beer????
Steve,
Looking at your schematic, I see you have pull up resistors on the buttons. Is there any reason why you did this instead of using the internal pull up resistors on the arduino/atmel? Also, I am guessing that you used transistors for the heater and buzzer to be more compatible? I suppose that is a good idea even though some options would be able to use these low output voltage and currents with no transistors.
Very good work smile.gif
Edak,
just a left over from my PIC days, I have always put pull-ups on my push buttons. I know that I could have driven the SSR directly from an output pin but I wanted a LED driven off the same pin, then you know on light no output, with a 1.2v drop across the LED I was getting very close to the 3v operating limit of a SSR so I decided to go with the transistor. With the buzzer have you ever heard a piezo at 5v its not very loud so again I went with the drive transistor. Its good that I posted the schematic because looking at it I have noticed some errors like the +5v supply on the relay and the use of BC 547 instead of 2N2222a which is what I'm going with.
cheers steve
