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projects:nch8200hv:nch8200hv_troubleshoot [2020/12/16 10:27]
admin created
projects:nch8200hv:nch8200hv_troubleshoot [2020/12/16 10:58] (current)
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 +====== Suppress/Eliminate the High Pitch Noise ======
 +In certain circumstances, the module may generate a high pitch/frequency noise, audible to human ears. It can be suppressed, if not completely eliminated, by the following method.
 +**Add an aluminum electrolytic capacitor of 4.7uF/200V to the ceramic capacitor in parallel.**
 +This will efficiently suppress the noise level.
 +This method has also been used by Dalibor Farny in his Puri clock ([[|Link]]) currently in mass production. 
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