low-cost variable power supplies

[ted572]

Hello:   I posted the GOPHERT CPS-3205E Power Supply Calibration Procedure, Specifications, and general comments on easily improving the LED Display Contrast of any of the different GOPHERT Power Supplies.
I highly recommend the CPS-3205E Power Supply as it has been very reliable for me.  It is small, lightweight, and inexpensive at ~75 US$.
If interested please go to -> https://www.eevblog.com/forum/other-blog-specific/new-2016-gopher-cps-3205c-review-teardown/msg1181084/#msg1181084