With some recent upgrades to the boat’s heating system, the hot water circulation pumps we’ve been using are becoming far too small for the job. After the original Johnson Marine circulation pump died of old age (the brushes wore down so far the springs ate the commutator) some time
Continue readingnb Tanya Louise Heating Upgrades – The Pumps
Finally, after a couple of weeks wait time, the fan controllers for the power supplies have arrived. They’re small boards, which is good for the small space left inside the case of the supply. Here they are. I’m not certain what the pair of potentiometers are for – there’s no
Continue readingDIY SMPS Fan Speed Control – The Controllers
While I’m waiting for the fan controllers to arrive for the new cooling fans, I figured I’d get them fitted into the cases of the supplies & just have them run at minimum speed for now. After removing the original small fan, I cut a larger square hole in the
The power supplies I have recently built from surplus Cisco switch boards have started displaying a rather irritating problem – continual load of over 9A causes the supplies to shut down on overheat. This was partially expected, as the original switches that these supplies came from are cooled by a
Here I will document progress in replacing standard halogen MR10 lights with LEDs. These units are from TruOpto, available through Rapid Electronics in the UK. They are 3W total, from 3x 1W emitters on an aluminium back plate. Here is the LED attached to a heatsink for testing purposes –
This is a small 120W power inverter, intended for small loads such as lights, fans, small TVs & laptop computers. End cover of the unit, 12v DC input cord at the top, power switch & indicator LEDs at the bottom. Opposite end of the unit, with the standard 240v AC