Well after considerable reading on here and elsewhere I've almost completed my first light. It's based on Martin's circuit 2 as I didn't physically have room to include anything else and includes help from Trout, Bobblehat, Ktronic, Acme-fixer and others so thanks are due to them.
The light uses 2 XPGs and Reginas with a smoothing cap and 4 schottky diodes as a rectifier
First I bought a 1oz stainless steel flask from a car-boot sale for £1, identical to this one:
It measures about 40mm x 45mm excluding the cap. I cut the bottom off with a dremel:
I had to file the LED stars considerably to get them to fit into the case. The edges were later painted with liquid insulation tape to prevent shorting on the case:
A heatsink was made from some aluminium angle and a switch fitted to the back of the flask:
The smoothing cap, rectifier and switch before painting with more liquid insulation:
The insulated stars ready to be stuck onto the heatsink with artic adhesive:
The completed light just waiting for some 1mm polycarbonate to arrive. I had 2mm but ended up without enough room:
Whole thing including this bracket weighs 106g
Mark 2 light already planned will have boost caps, a standlight and 4 LEDs and may also have daylight detection:
The light uses 2 XPGs and Reginas with a smoothing cap and 4 schottky diodes as a rectifier
First I bought a 1oz stainless steel flask from a car-boot sale for £1, identical to this one:
It measures about 40mm x 45mm excluding the cap. I cut the bottom off with a dremel:
I had to file the LED stars considerably to get them to fit into the case. The edges were later painted with liquid insulation tape to prevent shorting on the case:
A heatsink was made from some aluminium angle and a switch fitted to the back of the flask:
The smoothing cap, rectifier and switch before painting with more liquid insulation:
The insulated stars ready to be stuck onto the heatsink with artic adhesive:
The completed light just waiting for some 1mm polycarbonate to arrive. I had 2mm but ended up without enough room:
Whole thing including this bracket weighs 106g
Mark 2 light already planned will have boost caps, a standlight and 4 LEDs and may also have daylight detection: