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Unread 26-08-2005, 09:10
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Al Skierkiewicz Al Skierkiewicz is offline
Broadcast Eng/Chief Robot Inspector
AKA: Big Al WFFA 2005
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Re: DIP/SIP resistors

Andy,
It is not essential to have matched resistors in that application since you want the code to be a window comparator to handle variations in power supply voltage. If you had an application that only used part of a network and you had just enough left over for a switch(es) that would be an efficient use of components. The switch we use from Radio Shack is designed for wire so we used 1/4W resistors wired to the switch terminals and then we only had to bring back two wires to the analog joystick input. We had to mechanically modify the switch by removing a stop and that allowed a six position switch to fully turn to 11 positions. (It also reguires the removal of one of the wipers. It isn't pretty when you're done but it works well for our purposes.
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Good Luck All. Learn something new, everyday!
Al
WB9UVJ
www.wildstang.org
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Storming the Tower since 1996.