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need help picking components

l1t7l3ph0o7
l1t7l3ph0o7 over 13 years ago

Ok I have a project that requires 3 pwm outputs and two digital inputs

I'm looking for an 8-pin MCU where i can just analogWrite to the PWM pins instead of mucking around with software PWM.

 

I've tried the attiny45, but have had no succcess with pwm on three pins, the closest i can get makes one of the inputs high, and i need that input for a button.

Aslo i need to be able to program it with my arduino uno, I see i can program lots of chips with the arduino, so i don't forsee that to be a problem.

 

also using the PWM pins I intend to control three mosfets to control 1 meter 30 led 12v led strip i got from sparkfun.com, and I would like to find a one chip solution to do that, or at least find another way to make the circuit smaller.

 

I am open to using bigger chips, though I need to keep the circuitboard small, it has to fit in a very tight place.

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  • nathanjseeley
    0 nathanjseeley over 13 years ago

    The other thing you could use Is some 555 timers for the pwm and then use the attiny45 to handle the button. You can find some 555 calculators on the web so you can get your desired frequency. Infact (from the sound of it) you could almost use 555 timers for the whole project (not that I would recomend that)

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  • nathanjseeley
    0 nathanjseeley over 13 years ago

    The other thing you could use Is some 555 timers for the pwm and then use the attiny45 to handle the button. You can find some 555 calculators on the web so you can get your desired frequency. Infact (from the sound of it) you could almost use 555 timers for the whole project (not that I would recomend that)

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