ATtiny45 with arduino

Question

I was wondering how to controll 3 switches with one PWM pin,

what i had in mind was : hooking up the analog pin from the ATtiny to the Digital PWM pin from the arduino, and have a code like this:

if I send ...say 100 to the PWM pin , and i receive that value at the Attiny's analog pin and have it to do this :

If (analogRead == 100){

digitalWrite (Pin6 *from the Attiny* , HIGH)

}

then i send a 150 from the arduino and have it turn the other switch on , and in theory i should be able to control a few buttons with a single PWM pin from the arduino , is that really possible?

Thanks

YT2095 · Accepted Answer

for the IR side, you can consider the H/ware as a Gate, light comes on, resistance drops. that`s a single binary state, so you need some sort of protocol to get more than one state out of it, else you could just use 2 (or 3) pins to a 74138 and get your 4 (or 8) switch states from that. you could write your own protocol, a bit like Morse code for just your 3 switches, or use a Library that will also parse single line coms like I2C, Serial, IR, or even a Morse code look-up table! the problem is more likely to be Which of these has a greater Memory economy? and so it becomes a Sizing excersise more than anything at this point, as All of the above will actually work, just how much Mem is left over for you to use? you could even go the RF route, with these TTL 433MHz transmitter/receivers (they`re only tiny!).

Former Member · Answer

If your going to do that then why not use an IR emitter and receiver.

billabott · Answer

Why not use I2C for your communication between the two microprocessors? This link might be helpful.

ATtiny45 with arduino

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