Posts by DavidCary
One common 12 V DC power connector is the "2.1 mm plug": 2.1mm inner diameter, 5.5mm outer diameter. Jameco says it is one of the most common DC power connector. Several Sparkfun power connecto...
From the point of view of the SPI peripheral (and any debugging tools you have directly connected to the SPI bus), there is no difference between SPI stream and memory-mapped SPI. The difference i...
Connect the shield directly to ground plane Most manufacturers recommend connecting the USB connector case (which is connected to the cable shield) directly to the PCB ground plane. In theory, wh...
I've seen a few different circuits (a) (b) (c) (d) described as "an O-ring circuit" or "an optimal O-ring circuit". What does the "O" and the "ring" refer to in such circuits? How do "O-ring circ...
