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Clothes Drying Rack - Old Fashion Design Copy
Nexus 7 Antenna Upgrade Part 2
connections seems to be ok but leds negative side is connected to emiter transistor and minus from battery? I've meet sometime problems with ring toroid can't light a joule thief. Check other toroid ring and transistor fault if any. I've made a bigger joule thief inverter on cilindric toroid primary-45meters x wires(0,28mm) and secondary 24turns 0,68 mm over primary connections from secondary just like joule thief and I can light 3w-5w bulb leds from 1,5v battery over 4 hours light. Joule thief it's an easy schematic but any foult cannot make it work. Don't give up. Try harder. Cheers
What transistor type you've used?
Use a potentiometer 1k for adjusting brightness or even better 100ohms pot.