Super Turbo Battery Charger
A ferrite tube based Lasersaber SJR 3.0, with a very different function. See laserhacker.com for the circuit. With the knowledge that the SJR 3.0 powers up different sorts of light bulbs, I wondered if that would cross to batteries too. It does some strange things indeed ! The ferrite tubes came from various monitor cables, power supplies and other junk electronics. 4 of them were of the same diameter and so were glued together, with Fix All glue. The glue goes between the pieces, such that the ferrites are all touching and not glue spaced. The Fix All allows a good continuation of the pieces, rather than defined dips between them. Next, 600 winds of approx 34 gauge wire, then, over the top, 150 winds of approx 22 gauge for a 4:1 ratio, The transistor used is a C4439 (taken from the neckboard of a PC monitor). Of medium power rating, it’s nowhere near the spec of a 3055 or power transistor. But, the open running current is 35mA and with a LOA LED mains bulb on the output, that drops to 27mA. Pretty good figures. Power comes from a salvaged restored 12V drill battery. The circuit here has an LED ‘ON’ indicator, made from a coil that came from a floppy disk drive, with an LED soldered to it. When the light is on, the circuit is producing wireless electricity. Charging appears to be very rapid and bursts through dendrites, plus many other issues with old batteries. Only 1.2V – 1.5V batteries have been tried yet, but the output is strong enough to spark a mains bulb into …