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April 12, 21 Comments. I opened my R and soldered a jumper wire to the transistor that you pointed out in the picture above and plugged it into digital pin 2 on my arduino uno. I wrote a short script to just see what the pulses look like and I get mostly random looking pulse widths.

Pin was low : Pin was high: Pin was low : Pin was high: Pin was low : 23 Pin was high: Pin was low : 52 Pin was high: 25 Pin was low : Pin was high: Pin was low : Have you also removed the Ohms resistor as per this picture:. Try that and let me know how it goes? Instead I just soldered a jumper to the transistor and ran it directly to my arduino pin 2. I did try your code snippet above. My code looks the same as how you fixed it above except I added a few things to make it run as an individual arduino sketch.

It works! I guess it was a problem with the reference voltage in my arduino. The arduino uses the supply voltage as Vref by default I believe, still need to do more reading on this. Anyway I used the usb to power the arduino and used the 5V out from the arduino to power the receiver and now it works like a charm. Your code is a great help by the way.

A few minutes after I posted that I realized that I was using two power sources with no common ground and that was most likely my problem.

The only hole that is perpendicular to all the others. Some of them do by default, some others can be hacked like my Graupner one , etc. Great explanation. Thanks a lot. I have a question. If I want to use it with arduino 8Mhz what I have to change in timer? This way the rest of the code should remain identical. You are commenting using your WordPress. You are commenting using your Google account. You are commenting using your Twitter account. You are commenting using your Facebook account. Notify me of new comments via email.

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Freeduino Rover. Infra Red PC control. Metal detector. While in London…. Create a free website or blog at WordPress. Home About. Posts Comments. RC Receiver Timing Diagram. Did you enjoy the article? Like this: Like Loading November 25, at am. November 25, at pm. Robert says:. November 26, at am. November 26, at pm. Brian says:. February 21, at am.

Any advice? Brian My test code: Serial. February 21, at pm. Hey Dan, Thanks for the quick response. Thanks for the help Brian. February 22, at pm. Hey Dan, It works! Thanks for posting this article. It saved me a lot of poking around my receiver to find the PPM.

February 23, at am. January 6, at pm. Hope this helps, dan. September 4, at am. July 30, at pm. July 31, at am.

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Graupner R700 FM receiver – get the PPM signal

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