Hi guys, This is a tricky one that has me confused!
Basically I have used my arduino to program a little ATtiny85 that turns On/off Supply to a pin (LED's to be attached) With the function of being able to adjust the brightness by holding the button down (As explained in getting started with arduino book example 5).
I have it all working to the stage where I can turn on and off and vary brightness of some 3v led's without the use of resistors, BUT I designed the circuit for use in my car where I wanted to use 12v LED strips. The input voltage for the ATtiny is 3.2 - 5.5 V so I will have to use a voltage regulator to limit that (I forgot how to do this exactly to what I need!
) . The problem arises where I am not sure if it is possible to effectively Upscale the voltage from the pin to 12v (Whilst still being able to adjust voltage to vary brightness) Or to use the ATtiny's output to effectively switch on and alter the 12v supply seperately.
I think it may be possible with some kind of transistor but this one truly has me confused!
That probably sounded like a load of nonsense so I professionally made up a BS8888 Standard Engineeirng drawing for you below
(The wonders of paint!
I would greatly appreciate any help you could give me... I'm truly stuck!
Thankyou and happy modding!
EDIT: I just noticed I forgot to connect the other pin of the Button to the +VCC on my expert diagram hahaha, assume it is connected