negative logic high this may sound like a simple minded question but this is the first time i ve ever had a need for this i ve been designing some relatively simple chip circuits based on things like photoresistors you know no light to photoresistor emit a logic high etc anyway i ve got some servos lying around and i wanted to do some things with them using digital logic i know all about having to pulse the signal and everything i just have one problem i m assuming i need a negative yes negative logic high to get the thing to turn in the direction opposite the direction it would turn under normal logic high is a negative logic high i ve seen this in schematics the same thing as an active low or what i m not using a bi polar power source so how would i get a negative logic high out of this thing i need to have all three signals available logic high logic low and negative logic high any help would be greatly appreciated also please reply via email as i never seem to have time to read this or any other group lately thanks much mark umlangston memstvx memst edu
