Look closely at the colored pixels on this pair of 8×8 RGB LED modules and you ... but look at this breadboard! The layout of his circuit is as equally impressive as the code he wrote to ...

The circuit is so simple ... or you can just lift up the connection on the breadboard and repurpose the LED. Be aware though: The mbed code assumes you have an LED connected to pin 14 and will ...

As the main cap voltage falls the led current falls – to the point where there is not enough Vbe to keep the pnp on, which starves the base of the npn – so the whole circuit snaps off again. With the ...