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Picture of the MSB430MS extension board


The MSB430MS is a generic interface board which can be used to attach various sensor devices to the MSB430H or the MSB430 board. The schematics and hardware drivers are available for download as open source so that not only the assembled device but also parts of its design can be reused.

Selected Features

The MSB430MS board provides power for the MSB430 core module and is equipped with multiple connectors for attaching project specific hardware. The device is powered from a Lithium-ion polymer battery (Li-Po). The Li-Po can be automatically charged from an external 5V power supply. Voltages of the Li-Po and of the external power supply can be monitored.

The board is equipped with 8 digital outputs on TTL-level and 8 digital inputs. Those inputs can be either operated on TTL-levels or be regulated down from up to 12V. Power supply for up to 8 external devices can be controlled: 4 devices can use the regulated 3V power, the remaining 4 can use the unregulated external power. Furthermore, the MSB430MS supports four RS232 interfaces via an integrated multiplexer. It’s also equipped with two 16 bit AD converters.

Power switch, reset switch, a JTAG connector, and a beeper are included as well. Power supply of most of the components on the board can be individually controlled by the MSB core module, so only the required ones can be left enabled.

The board has physical dimensions of 9 cm by 6 cm (3.5” by 2.4”). The interface pins were specified to be compatible with IDC sockets in order to make it easier to attach external devices.


The schematics as Eagle Files and hardware drivers were combined into one archive and can be found in the download area.

Screenshots of the MSB430MS schematics

Known Issues

  • Some IDC compatible sockets were placed too dense. It should be taken into account when reusing the design.
  • Charging circuit is designed to charge the Li-Po as soon as the external power is available, this is not always wanted and should be taken into account when reusing the design.
  • JP28 is hardwired to a grid of capacitors that might flatten digital signals
    • Workaround: use the P1Bx pins instead of JP28 pins

The MSB430MS PCB was desiged by Dr.-Ing. Achim Liers based on requirements specified by the project partners.

a simple hit counter

Last edited Jul 2, 2010 at 7:08 PM by tomasznaumowicz, version 27


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