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 #29: Ambient temperature meter.
This Tibbit contains an MCP9808 ambient temperature sensor IC with I2C interface. The sensor is implemented as the C1 device with perforated front face and a rubber wall separating the temperature sensor from the internal space of the TPS. This is done to minimize the influence of the heat produced by the TPP and other Tibbits.
The MCP9808 has programmable resolution and measures the ambient temperature in steps as small as 0.0625 °C, but the conversion time required to achieve this is rather long. The sample project (see below) operates with 0.25-degree precision, which is sufficient for most practical purposes and is achieved with a relatively short conversion time of ~65ms. This device operates with a typical accuracy of ±0.25 °C.
This C1 device requires that Tibbit #00-3 is installed in the neighboring M socket. #00-3 provides two direct lines for I2C comms, as well as the ground and +5V power for the MCP9808.
- Form: C1
- Power: 5V consumes 2mA
Sample Project The use of this and other I2C Tibbits is illustrated by a group of Tibbo BASIC test projects.
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.