low volt led flasher schematics

Posted on Feb 6, 2014

In the circuit diagram for the Joule Thief, the common point of the toroid is the connection at the top of the hand-wound ferrite toroid, in the upper right of the diagram. This goes to the positive end of the battery. The other two wires from the toroid go to the resistor and to the intersection of the transistor with the LED. One other detail th

low volt led flasher schematics
Click here to download the full size of the above Circuit.

at you may need to know is the symbol and pinout of the 2N3904 transistor. In the symbol, the part with the arrow is the emitter , the collector  is the end above it, that also connects to the LED, and the base  is the wire leading off to the left, between the collector and emitter. (Also remember that the end of the LED with the flat side and short lead is the end that has the flat bar in the diagram. )

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