Quote:
Originally Posted by kalee20
So , tempt me... (nearest PE will be in Barnstaple, 20 miles away): Is there an efficiency figure quoted? And are LT and HT both derived by switching techniques or is the LT just a linear regulator straight from the battery?
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Reading the first page on the link I posted above it looks like LT is derived from a linear regulator from the battery.
The HT uses a normal mains transformer "I chose a 5W PCB mounting mains transformer which I used backwards" so the switching frequency must be between 50 and a few hundred hertz.
Peter