General > General Technical Chat
Dim bulb tester / powersupply ?
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tggzzz:
Be careful of such techniques with SMPS power supplies.

When the equipment is workign normally, SMPS power supplies regulate output power.

Therefore if you reduce input voltage, they will (attempt to) increase input current - and semiconductors might have a hissy fit.
tautech:

--- Quote from: rcjoy on January 30, 2022, 02:10:07 am ---
Here's one with an isolation transformer and Variac.


--- End quote ---

If really serious about a decent test bench mains supply a mains test block is a nice addition:
https://nz.rs-online.com/web/p/mains-test-blocks/1994813
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