Hard Knock Radio is a drive-time Hip-Hop talk show on KPFA (94.1fm @ 4-5 pm Monday-Friday), a community radio station without corporate underwriting, hosted by Davey D and Anita Johnson.
Optical sensors are a broad class of device for detecting light intensity. This can be just a simple component for notifying when ambient light levels rise above or fall below a prescribed level, or a ...
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