EBS-blinking-circuit
thingiverse
Another brilliant project for the EBS (http://www.thingiverse.com/thing:1899461) unfolds! Not an AMV, but a single LED that blinks with incredible energy efficiency. It will shine bright even down to about 4 volts, defying expectations. One battery can last a whole year or longer, making it a marvel of sustainability. A crucial note: The green transistor is the PNP type (BC556,557,558). Meanwhile, the blue one is the NPN (BC546,547,548). Don't forget that the diode is also painted green, while the resistors gleam in blue.
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