RPi Tutorial EGHS:12V relay driver
Contents |
Back to the Hub, or the Tutorials page.
GPIO Hardware & Software Tutorials:
- GPIO Protection Circuits
- Basic Circuits: LED output - DC motor - Switch Input - Analogue Sensor
- Intermediate Circuits: Shift Registers - Analogue to Digital - Driving Circuit - Alpha-Numeric Display
- Advanced Circuits: Control Hardware Over The Internet
This page is part of a work in progress.
Warnings
While most of these circuits may interface directly to the RPi, the use of a buffered interface (such as the one supplied by the Gertboard) is recommended which will help protect against damage. Alternatively, experiment with one of the Alternative Test Platforms.
Extreme caution should be exercised when interfacing hardware at a low level, you may damage your RPi, your equipment and potentially yourself and others. Doing so is at your own risk!
Aims
Note: The 12V relay driver circuit has been tested with real RPi device and was working properly.
The Hardware
The 12V relay driver circuit combines protection circuits described in GPIO Protection Circuits. Design was done with respect to maximize GPIO protection and minimize GPIO current withdraw.