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Article #38Re: Remote control reciever question for timing of servo pulses
From: John Crighton
Date: Mon, 24 Mar 2003 12:28
Date: Mon, 24 Mar 2003 12:28
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2554 bytes
On Mon, 24 Mar 2003 05:37:08 GMT, Ryan Kremser <news@rkremser.endjunk.com> wrote: >Hello, I am working on a project using a r/c receiver connecting to a >micro controller. Part of this project requires me to time the >individual servo pulses. Why can't you just use an oscilloscope? > It would be much easier if all periods of the >pulse signal lined up with each other. >Does anyone know if this timing >period starts at the same time for all servo channels or do they start >separately. Any ideas of where i could find this information? Put your oscilloscope probe on the input of the decoder and you will see a long pulse and four short pulses, if you have a four channel transmitter. The Rx's decoder may have four outputs, you will see a short pulse on each output. Have a bit of a play around, if you have a two channel CRO. Look at channel 1 on CRO input A and trigger the CRO off CH A Look at channel 2 on CRO input B and notice that the pulse is behind channel 1. They do not line up. The come one after the other. Have a play with the Tx's controls and watch the pulse widths change. Regards, John Crighton Hornsby Heights
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