Difference between revisions of "Hardware: Sensor Wiring"
| Line 1: | Line 1: | ||
| − | The Developers Kit will use RJ14 (6p4c) connectors for the sensors. | + | The Developers Kit will use modular telephone RJ14 (6p4c) connectors for the sensors. Pins 2, 3, 4, and 5 are used. |
| + | |||
| + | Eventually, the load cells will be supplied with the connector attached. Cables will be provided for the other sensors. | ||
These instructions are for developers that use the Dev Kit Raspberry Pi Hive Interface board versions 0.1 or 0.2. | These instructions are for developers that use the Dev Kit Raspberry Pi Hive Interface board versions 0.1 or 0.2. | ||
| Line 21: | Line 23: | ||
[[File:Loadcell connector 3.jpg|thumb|right|500px]] | [[File:Loadcell connector 3.jpg|thumb|right|500px]] | ||
| − | + | ||
| − | |||
| Line 52: | Line 53: | ||
Wire colors are Black, Red, Green, Yellow. | Wire colors are Black, Red, Green, Yellow. | ||
| − | Crimp the | + | Crimp the RJ14 connector for normal telephone use: |
2 Black | 2 Black | ||
Revision as of 04:48, 4 December 2015
The Developers Kit will use modular telephone RJ14 (6p4c) connectors for the sensors. Pins 2, 3, 4, and 5 are used.
Eventually, the load cells will be supplied with the connector attached. Cables will be provided for the other sensors.
These instructions are for developers that use the Dev Kit Raspberry Pi Hive Interface board versions 0.1 or 0.2.
The Registered Jack (RJ) series connectors install using an inexpensive crimping tool.
Contents
RJ Connectors
Some RJ connectors are designed to take round cable, some flat, some both. Some are designed for solid wire, some for stranded, some for both. They are insulation displacement connectors (IDC) that pierce the insulation on the wire, forming a gas tight joint.
For a detail description, see Registered Jack on Wikipedia.
Number of Contacts
Contact numbering
Load Cells
2 Red
3 White
4 Green
5 Black
- Remove any heat shrink from the load cell cable.
- Cut off the drain wire.
- Spread out the four wires and arrange them in Red, White, Green, Black order.
- Gently flatten the cable with a pair of pliers.
- Evenly trim the wires so they extend approximately 1/4 inch past the jacket.
- Orient the RJ14 connector so the latch tab is up.
- Insert the wires all the way into the RJ14 connector, making sure that the wires are in the right order.
- Inspect the wires and connector with a magnifier. Make sure the outer jacket is past the strain relief and each wire is all the way to the end of the connector.
- If the wires do not extend the full length of the connector, or the jacket does not go past the strain relief, remove the wire and trim a little of the jacket, or shorten the wires.
- Crimp the connector.
DHT22 Temperature and Humidity Sensor
Wire flat telephone wire.
Wire colors are Black, Red, Green, Yellow.
Crimp the RJ14 connector for normal telephone use:
2 Black 3 Red 4 Green 5 Yellow
