After toying with the relays and Arduino I found that the diodes weren’t necessary – especially since the relay is latching, and current will be flowing both ways, so putting a diode in each direction would just create a short. As such, I made some modifications to the board and put it into Gerber files [...]
I really wanted there to be a complete solution for the Woot-Off lights project that could be almost plug and play for the end user, so today I drew up a schematic and a board for a USB Power Shield for the Arduino. It pops onto the Arduino like any other shield, and by controlling [...]
Here’s some details about the hardware setup for the woot-off lights. It’s exactly as I described in the first post – this just includes the schematic and goes a little more in depth. Let’s take it from left to right. USB input to the Arduino to send serial data. The current from the USB port [...]
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