This is a Tibbit module — part of the Tibbo Project System that allows you to build your own custom embedded device with only the components you need. Start with a Tibbo Project PCB, add Tibbits like this one, then place the built design into a Tibbo Project Box to complete your product.
Tibbit #21: Four terminal blocks.
This Tibbit provides a terminal block interface to the outside world. It connects to any M Tibbit. For double-width M2 Tibbits, you could use one of these plus one of another C1 Tibbit, or two of these.
C1 Tibbit Modules Overview C1 Tibbits are single-width "connectors" occupying one standard C socket on a Tibbo Project PCB (i.e. TPP2 or TPP3). They have roughly the same width and height as M1T devices: 17.4mm wide usually and 17.5mm high. Their depth varies depending on the type of connector.
Some C1 Tibbits are just connectors such as a power jack, terminal block, etc. Others "sense" the outside world: temperature, humidity, vibration, IR, etc.
C1 Tibbits have a single row of 4 pins. All four pins are I/O lines that connect directly to four I/O lines of the adjacent M1 socket.
There are no dedicated ground and power pins. Many C1 Tibbits don't need ground and power anyway; they house connectors and nothing else.
If an attached external device needs ground and/or power, then these must come from the adjacent M Tibbit. Ground and power are also necessary for "sensor" C1 Tibbits.