I often use (flat) non-keyed connectors, in which case rearranging the connections slightly will make the connector non-polarized:
1 HV 2 LV 3 GND 4 LV 5 HV Bill -----Original Message----- From: neonixie-l@googlegroups.com [mailto:neonixie-l@googlegroups.com] On Behalf Of taylorjpt Sent: Sunday, November 01, 2015 6:09 AM To: neonixie-l Subject: Re: [neonixie-l] Super easy wall adapter mod: 9V plus 170V at 80mA Shorting the HV output to the 9V output will destroy the 9V output circuits: Rectifier, reference, opto coupler etc as well as probably the user circuit (Unless it is protected). This can't be avoided because of the energy stored in the HV capacitor. This of course would be the same situation if the output of the HV converter in a clock was internally shorted to the low voltage rail in a clock, etc. Shorting the HV to ground however has the same effect of shorting the LV output to ground: The switcher primary current sense circuit will turn the unit off. These power supplies are designed to handle this type of failure indefinitely. My choice of a 5 pin keyed connector is with the ground at the center left was made to prevent the HV from accidentally being connected to the LV output even if forced in backwards and give extra isolation from HV to GND. 1 NC 2 LV 3 GND 4 NC 5 HV -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To unsubscribe from this group and stop receiving emails from it, send an email to neonixie-l+unsubscr...@googlegroups.com. To post to this group, send an email to neonixie-l@googlegroups.com. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/0315f3b5-7e03-477f-8941-2dfabe85082a%40googlegroups.com. For more options, visit https://groups.google.com/d/optout. --- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To unsubscribe from this group and stop receiving emails from it, send an email to neonixie-l+unsubscr...@googlegroups.com. To post to this group, send an email to neonixie-l@googlegroups.com. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/001201d114b4%2401af0090%24050d01b0%24%40com. For more options, visit https://groups.google.com/d/optout.
