Reply to "Universal Meter Box for Layout or Workbench"

gunrunnerjohnOGR Forum Member SUPPORTING MEMBERDIGITAL SUBSCRIBER

@Santa Fe Jim posted:
I’m interested in using those Red Led voltmeters on my control panel to monitor voltage going to my Ross and Lionel 022 switches and some accessories I have on my layout. I’m a novice at electronics, learning more everyday though. What are my options for the 5V DC power needed?
Any advice appreciated.

The key requirement for the 5VDC power is total isolation from the voltage being measured. That being said, there are two options that come to mind.

eBay: 262957193060 Has the DC-DC converters I used, you just put a bridge rectifier and a 470uf cap in front of them.

Second choice is to just find one of the many cheap 5VDC regulated wallwarts and use them to power the two meters. Things like cell phone USB power can be had for a couple bucks and they're suitable.

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