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 2.GQ Geiger Muller Counter
 GMC200 to 1-wire

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T O P I C    R E V I E W
rwcherry Posted - 12/02/2014 : 08:18:11
Has anyone interfaced the data output of the GMC200 to a 1-wire counter like the DS2423. It looks like the GMC200 only outputs 1.4V pulses and the DS2423 is looking for > 2.4V??

If anyone has done it, please share; otherwise I'll go ahead and do it.
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ZLM Posted - 12/02/2014 : 11:07:23
The GMC-200 uses two diodes to clamp the audio output level to 1.4V. The original signal voltage is 9V.

You can remove two diodes and place a zener diode instead.

See:
http://www.gqelectronicsllc.com/forum/topic.asp?TOPIC_ID=3407&SearchTerms=diodes

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