64[DE]MUX

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64[DE]MUX

The 64[DE]MUX board is a design commissioned by the Samsung Art and Design Institute (SADI) in Seoul, Korea. This board allows connecting 64 analog/digital sensors using only 6 control pins from your controller. It becomes useful for projects with many sensors at relatively high reading speeds (up to 15 to 20 times/sec).

64 [de]mux v1

(c) 2007 D. Cuartielles for SADI

The board is powered at 5V and is using the old-but-safe-and-easy-to-find 4051 de-mux. This component makes very easy adding any devices to the board. All the pins have a pull-up resistor, what allow to easily connect push-buttons or switches using just two cables. Also many analog sensors like LDRs or NTCs can benefit from having this feature.

There is an on-board LED to check if the circuit is getting power and all the sensing pins have room for a pull-up resistor. The I/O pins have been numbered 0 to 63 and are grouped in sets of 8, in parallel with a row of ground connections. Next revision of the board (v0002, to be released in March 2009) will also include the power for every pin on the connectors, making the board fully compatible with others already out in the market using the standard 5V-signal-GND layout for connectors.

64 [de]mux v1

(c) 2007 D. Cuartielles for SADI

You can pre-order the v0002 series from here at the BlushingBoy open products shop. Follow this project if you are interested in the board's further development, but also if you would like to see some code examples to it.

Development Team
Admins
David Cuartielles

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