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Post by jjbrisvegas on Jul 1, 2014 10:30:25 GMT
Hi,
Just wondering if anyone has had any luck reading an 8 function decoder with a Lenz Command Station (LH100 throttle). I have found previously that function only decoders with about 80-100 ohms on one of the outputs is enough for the Lenz to read CVs, but I am not having much luck reading the 8 function decoder. Have put a load across the programming track also (tried 80-370 ohms) but no go so far...
Jeff Gold Coast AU
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Post by Paul Harman on Jul 1, 2014 12:01:29 GMT
If it is a high power decoder 100R should be OK, but if it is a low power decoder 100R will overload the outputs (trying to get 50mA out of a 25mA output).
In order to read a decoder you need to generate at least 60mA extra current draw for the ack pulse. To do this on a low power decoder put 220R resistors on at least three outputs or 120R resistors in series with red, yellow or green LEDs so that you can see the ack pulses while they are being generated.
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Post by jjbrisvegas on Jul 2, 2014 2:29:32 GMT
Thanks Paul
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Post by jjbrisvegas on Jul 2, 2014 11:48:33 GMT
Ok, so neither 120R with LED or 220R load let the command station read, but, at least I am getting the acknowledgement LEDs so I know it is changing CVs. I have gone through and changed CV33=0, CV34=0, CV35=128 through to CV42=1 which I thought should map F1 to output A etc. After the change none of the outputs seem to work - anyone able put me on the right track at all?
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Post by jjbrisvegas on Jul 2, 2014 12:02:53 GMT
Well I managed to get it working by erasing PIC, reapplying firmware and CV changes, inverting outputs, sipping a rum, and nursing my son. Not sure which one helped, but hey, it works (except for the command station won't read CVs but who cares).
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