Re: Need servo circuit help

From: Pooh Bear (rabbitsfriendsandrelations_at_hotmail.com)
Date: 11/05/04 

Date: Fri, 05 Nov 2004 22:14:14 +0000

Robert Wolcott wrote:

> My current plans:
>
> Redo the circuits on a circuit board (with solder)

And nice big wide ground traces. Avoid a common path for motor current and
control circuitry.

>
> replace the ceramic caps with metal film caps (hard to find?)

Who said 'metal film caps' ?

They said 'film caps' meaning metallised plastic film. Polyester ( mylar ) film
types will be fine. These are so easy to find it's untrue.

They have stable capacitance unlike certain ceramic types.

>
> Add capacitors across the IC power inputs and VR inputs.

This is called 'supply decoupling' and helps reduce the effect of noise that may
couple to the power supply. Absence of this can cause erratic operation.

Graham

Quantcast