Updated 18 May 2014 - I have nearly 20 blank PCBs for SmartBoard v1.01 that I will not need. I can make these available rather inexpensively. See this Kit information.
|The design objectives for this baseboard were to create a general purpose baseboard that can be used for educational use, or just as effectively designed into an embedded solution and forgotten. Whether for education, hobby, or commercial usage, a reliable design reduces doubt, development and rework.|
While experimenting, headers and shorting blocks permit easy alteration for flexible access to various IO configurations. For permanent installations, soldered-in jumpers could be used instead.
Note: This 3D rendering approximates the finished board.
Note: Actual unit in a nearly completed configuration.
- Through-hole parts [where practical] to keep it easy for educational, hobbyist, or professional to work with
- Embeddable using screw terminals for most of the interface signals
- Varying populations of parts and jumpers support combinations of:
- 2 x CAN
- 2 x RS232 (1 DB-9, or 2 Screw Terminal)
- 2 x SPI Port
- Ethernet w/LEDs
- USB-A Host
- USB Slave on the mbed itself
- PWM outputs pinned for Servo Motors
- 6 Analog Inputs (with optional surface mount protection diodes)
- 1 Analog Output (in place of 1 of the Analog Inputs)
- Micro-SD card (surface mount part)
- Battery backup for RTC (hole in PCB can be used to lock battery it in place)
- External Power Input using one of two regulators for different needs.
- Low dropout linear for lower voltage projects
- Switching regulator suitable for a wider voltage range
The BOM cost (excluding PCB and mbed itself) is about $47 in single quantity for a typical build.
This is the original version that was built.
- v0.05 Schematic - PDF
- v0.05 PCB - PDF
- 3D Image - View
- Bill of Material (updated to version c) - Excel
- Design Notes - PDF
- SmartBoard Hardware Tester - Program
All documentation is believed to be completely accurate, however it is in your best interest to review and verify. Please report any errors or unclear information you may find.
See the Construction Notes
- SmartBoard WiFly - Wireless sensor/control node using WiFly Bridge board.
- HDMI CEC Interface to interact with your TV and other HDMI gear.
- Display Controller to be combined with other projects.
- Security monitor - With the complement of inputs, this could monitor doors, windows, temperature, light, and signal a change with a controlled output signal, or perhaps an email to your phone.
- Car interface using the CAN port(s) - Most modern cars have CAN networks, and this could be the bridge between that and your PC.
- AV Receiver controller - There were a few years there where high end AV Receivers had serial ports, but not Ethernet. Put a [web] server in mbed, which interfaces to the AV Receiver on the back-end using RS-232. Control it from anywhere.
- Servo Controller - with 6 channels of PWM, there are some possibilities there.
- But the best idea is the one that you're thinking of...
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