Another DIY servo project – all schematics, many modifications and revisions.
But you have to buy servo brain – MCU ATTINY2313 from -
Here is the link for long … long discussion about it –
Here is the link for High power version -
UHU Servo controller WIKI -
One of the best things are free …
Here is presented free and open source project of DC servo motor control – very useful for CNC DIY makers !