Hi all,
About a year ago I got this cheap Chinese "GOPHERT CPS-3205" power supply for my hobby prototyping.
Recently I had some odd ADC issues, and I finally had the sense to measure actual voltage from this power supply while under load. It turns out that even in "Constant Voltage" state, the output voltage drops significantly with load, while the display still shows me the voltage I defined.
For example: I set the supply to 5V, 1A, and connect to a 100W 10R resistor. Current should be 0.5A give or take, right? But the power supply shows 5V, 412mA, and a multimeter across the resistor shows 4.02V.
So first, a sanity check - this is not supposed to happen, right? Constant Voltage mode means I should get an actual constant voltage?
Second, are there reasonably good benchtop power supplies out there for a relatively modest budget (shipping included)? I'll need something that can take 230V/50Hz.
Thanks,