ATTiny Servo Extender
This is a small project to extend the range of servos from e.g. 90 degrees to 180 degrees with a cheap $4 DigiSpark.
There's also some PWM code to provide a 25KHz pwm on pin 3 (PB4, P4 on the digispark) with a duty cycle of about 30%. This allows you to slow down a PC fan.
Your input, from the receiver should come in on pin P0, and the adjusted signal to the servo, will be output on pin P2.