I have setup 6 automated lights on my stair case using PIR sensors.
I use a UNO right now.. which now has all the digital io pins taken by the relays / PIR sensor inputs.
My question is..
I need at-least 4 Inputs and 6 Outputs + a DS1307 for RTC.. is it possible to use a ATTiny84 with shift outs?
so It uses less power and I will have an extra UNO to play with
all I m going to do is use the clock to see if its day or night ? and then use the PIR sensors to activate relays
I have ordered a few ATTinys like 84 and 85 already..
So I would love to use anything that doesnt waste my complete UNO that just looks nice
One side qn: sometimes ALL my lights go on .. when someone runs around.. so Is it possible I may exceed the amperage that i can take out of each/combined IO ports?
My relay is "8 Channel relay board with +12V relays 10A/250V AC with ULN2803 IC" Seller didnt provide me any datasheets to work with.