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Two LEDs showing serial activity on the TX/RX lines
with all the power and signal lines brought out to to both sides of the board to allow daisy-chaining with other I2C-conformant boards
Substitute direct soldering to the oversized output pads for higher currents/duty cycles
the most common variant uses 5v for chip supply and logic levels
and cables
Current Source Plug JeeBoot Two LEDs showing serial activityThe Current Source Plug is a small board based on the AP8803 chip to provide a constant current to two independent sets of power LEDs of 350 mA or 700 mA. The two I O pins can be used to turn the LEDs on or off, and for dimming via PWM. This plug uses a very efficient switching down convertor ("buck" topology) supply instead of converting surplus voltage to heat, as simple dropper resistors would do. Theoretically, each of the two channels can drive
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