External control of resistance through use of IR
External control of resistance through use of IR
(OP)
I need some help with driving a motor externally through infrared trnasmitting. The design that we have for the motor controller uses a potentiometer to control the speed AND direction of the DC motor. The problem is I need to control the resistance just as the potentiometer would from the IR decoder IC, which is pre-programmed. All I can control in this situation is the output of the decoder IC. I am thinking that I will use 3 relays powerd by the the 3 different outputs from the decoder IC each switching to use a different resistance. I am quite confused on this issue, as I don't work in electrical engineering.





RE: External control of resistance through use of IR
Hooking this circuit together will require detailed knowledge of the parts concerned. What is the output from the decoder: pulse width modulated or static logic lines?
Give us some part numbers and/or circuits and we will be able to help you more.
RE: External control of resistance through use of IR
http://www.maxim-ic.com/appnotes10.cfm/ac_pk/9
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RE: External control of resistance through use of IR
RE: External control of resistance through use of IR
Using relays is maybe not the best idea. It is good to use relays when you need high voltage isolation but not good for rapid switching. You are not driving the motor directly but just driving the controller chip. Tell us what the motor controller chip is and we can advise better.
RE: External control of resistance through use of IR
RE: External control of resistance through use of IR
RE: External control of resistance through use of IR
RE: External control of resistance through use of IR
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