hello everyone.

I am designing a submarine, and I need to add a servo. I wish to use the pic 16F684 because it is cheap. If successfull I will be making several of these boards for an education project for students and I want them to be cheap as possible. I have designed a basic circuit...will this work? any suggestions?? P.S. the fat traces are ground.

 

Usually a servo is driven by an output pin with an inline 100ohm resistor.

 

It is also standard practice for the vast majority of hobby servos to have the power (V+) as the center lead.

John

 

I would not drive the servo directly from the IO. A transistor would fit better for me. For security reasons basically.

 

thank you all for your help!!

 

I could suggest a cheaper solution. I did not used any PIC thought. If your study is on PIC, then do not bother. If your study is for servos themselves, take a look here:

http://pcbheaven.com/wikipages/How_RC_Servos_Works/

It uses just a 555 and a couple of resistors. The 2N2222 could be taken out. If so, change the 470 with an 100 ohm.