[NTG-context] context and circ

Hi, i want to change to context but i need the circ package. Is there a similar package for context? I have try the following search in google: http://www.google.com/search?client=opera&rls=en&q=context+tex+circuit+diagrams&sourceid=opera&num=50&ie=utf-8&oe=utf-8 Have i oversee anything? Thanx for your help ;-) al ;-)