22-09-2026
Earthing, Class I and Class II Explained
The earth pin, double insulation and why some power supplies need earthing while others do not. A quick guide to protection classes.…
Read more →
22-09-2026
Starting Into a Capacitive Load Without Nuisance Tripping
The supply is rated well above your steady-state current, yet it will not start. Large downstream capacitance is one of the most common reasons.…
Read more →
15-09-2026
Series and Parallel Operation: More Voltage or More Current, Safely
Need more volts or more amps than one supply gives? Wire two together - carefully. Here are the rules.…
Read more →
15-09-2026
Switching vs Linear Power Supplies
Two ways to make a regulated DC rail - one small and efficient, one quiet and simple. Here is when each still wins.…
Read more →
08-09-2026
Hold-Up Time and Ride-Through: Surviving a Brown-Out
When the mains dips for a few milliseconds, hold-up time decides whether your kit stays alive. Here is how it works.…
Read more →
04-09-2026
Inrush Current: Why the Lights Dim at Switch-On (and What to Do)
That brief surge when a supply powers up can trip breakers and weld contacts — here is why it happens and how to tame it.…
Read more →