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Attention: RC-CAM.com will be closing down August 2021.

The RC-Cam.com forum was the very first online community dedicated to the advancement of wireless video cameras on radio controlled (R/C) models. This is now called "FPV" (First Person View). We are proud of the contributions that our members have made to the FPV hobby.

We've seen significant changes over the last twenty years. Initially there were a lot of eager R/C hobbyist that built their own video systems. Allowing these creative individuals to share their work was the purpose of this site. Now the FPV market is flooded with low cost systems; Sadly DiY FPV video projects are now rarely discussed.

RC-CAM.com (main site and forum) will be closing down August 2021. This is being announced now (March 2021) so that everyone has time to download any information that is important to them. After the site is shutdown the information will no longer be available here.

We appreciate every member's involvement with advancing the FPV hobby. It is indeed sad to say goodbye to all our online friends. Be safe and stay healthy.

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Hi Folks..

Has anyone programmed the LMA for use with JR equipment such as the PCM9X2.

I've built the LMA but need to sort out a problem the buzzer cus it isin't working. To get around it at the moment, I've put an LED in position.

I am connecting it to a JR NER-649S (PCM) receiver on the AUX2 channel but can't seem to get it to function correctly. When I power up the LMO, I get the three flashes but when I power of the TX, I get nothing - well, not quite nothing. My problem seems to be getting the value correct for the LMA to sense that the signal has been lost.

I can program the travels but I can't seem to get a consistent activation of the LMO. Either it won't flash at all or it activates when TX is on. Some times I get a constant 1 second flash.

Anyone shed any ideas?

Many thanks


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I have no experience with the PCM9X2, but the basic idea is the same for all PCM receivers. You need a standard 1.0 to 2.0 mS pulse during normal use and a <0.95mS or >2.05mS pulse during fail-safe.

If the operating voltage is more than 5.2V then you may run into odd problems (higher voltages can damage the PIC). Receivers with extremely low servo signal levels may not work with LoMA.

If all else fails, plug it into a standard PPM receiver and confirm that LoMA is working correctly.

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