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Raspberry Pi automation add-on supplies five relays and 8-channel ADC

Aug 27, 2019 — by Eric Brown — 1658 views

On Kickstarter: a “Pi-oT” Raspberry Pi add-on complete with fan and DIN-rail mountable chassis that expresses the Pi’s GPIO with 26-pin terminal connectors that offer 5x relays, 8x ADCs, and power inputs.

A Cleveland-based startup called Pi-oT Hardware has gone to Kickstarter to launch a $40 and up Pi-oT automation add-on for the Raspberry Pi. The Pi-oT is available through Oct. 2, and if the campaign meets its modest $1,750 goal, it will ship later that month. On today’s launch day only, you can subtract $5 off the $40 (commercial) and $50 (industrial) prices, which will be 15 percent higher once the campaign concludes.



Pi-oT
(click images to enlarge)

The Pi-oT includes 5x SPDT relays with jumper pins that enable control via selectable GPIO pins. There’s also a 10-bit, 8-channel Analog to Digital (ADC) converter for reading sensors and data-logging. The open source MCP3008/3208 python library can be used to read the analog inputs.

The industrial version is essentially the same as the commercial, but it offers thicker 2-oz. copper PCB traces and higher rated Panasonic relays. It also supplies 12-bit instead of 10-bit ADC.



Pi-oT and detail view
(click images to enlarge)

Both models offer 5V, 3.3V, and ground pins. The system can either be back-powered through the 5V terminal or via an optional, $3 micro-USB female adapter, “as there will be over voltage protection on board,” says Pi-oT. The 3.3V pin enables the Pi-oT to power other connected sensors and peripherals.

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Two breakouts expose any unused GPIO pins. That may even be enough to drive some other simple HATs, which can be fit inside the enclosure. The DIN-rail mountable chassis includes a 5V high-flow fan, which can also be purchased separately for $7 for use with other Raspberry Pi projects.

 
Further information

The Pi-oT is available on Kickstarter through Oct. 2 for $40 (commercial) or $50 (industrial), and if you order on Aug. 27 you can knock $5 off the price. Shipments are due in October. More information may be found on the Pi-oT Kickstarter page.

 

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