There are plenty of SPI interface screens on the market, but few of them have the charm of the good old Nixie tube. [Tony] decided to whip up a simple three-Nixie module that could be addressed via… ...

The heart of the S160 is the MEMS Switch Module, which switches up to 160 fiber-optic signals from any input port to any output port. The module uses CALIENT’s patented micro-electromechanical ...

Therefore, when the DS2405's output is open, the relay is engaged. Conversely, when its output is closed, the relay is re-leased. With the indicated values, the oscillation frequency is about 300 kHz.