For an e-kayak venture that he’s been engaged on, Braden Sunwold wanted a approach to have his gadget wake from sleep and take enter from a single button. Whereas this might sound inconceivable at first look, contemplate that the identical form of factor is completed with shopper merchandise, such because the iPhone’s energy button. Sunwold created a PCB that is smaller than 1 / 4 to facilitate this dual-use button setup, utilizing an STM6601CA2BDM6F good push button controller IC that itself is smaller than a grain of rice.
The board is designed to accommodate a small onboard button for energy/IO functions, and may also be wired to an exterior set off. This exterior functionality got here in fairly helpful throughout testing, because the onboard button was laid out incorrectly, although one would possibly count on this error to be corrected sooner or later sooner or later. The gadget additionally incorporates a LiPo charging circuit through an MCP73831 chip, together with USB and battery connections, making it an all-in-one energy/enter answer for electronics tasks.
The construct is printed within the video beneath, together with a number of errors that Sunwold made alongside the way in which. Notably, if you happen to’re going to solder your PCB with a garments iron, you’ll want to have a plan to extract the PCB after the method is full. Particulars on this superior button PCB construct are discovered right here and right here. PCB recordsdata are on GitHub if you wish to look at the design intimately – or even perhaps construct your personal.