DB15 Input/Output Expansion Card for the V3.57

[dontz125]

Without the proto area of the V3.0 board, the V3.57 motherboard doesn't exactly lend itself to mods and upgrades. Also, many users select the V3.57 because it does NOT require a great deal of electronics expertise or soldering skill. The net result is that many of the functions on the JS-xx headers go unused. While the MS3X card offers a great deal of I/O, some users want more options, some don't use the 3X card, and some are using an MS2 daughter card.

This little card provides the filter and guard circuits for JS4 (ADC7 or Digital Input), JS5 (ADC6 or DI), JS7 (PE0 DI), JS10 (3A ProgOut or DI), and JS12 (PE1 DI), and brings them out to 5 pins on the DB15 connector. The JS10 I/O function is selected using a provided jumper cap. The pull-up resistors to use JS4 & 5 as digital inputs are selected using provided jumper caps; if temperature sensors are to be used with these ADCs, a selection of through-hole resistors (2 each 2.2k, 2.49k, 9.31k, and 27k) are included for use as bias resistors.

The digital input function of all 5 pins can also be used with Hall sensors for VSS; JS10 can be used as a cam sensor input. The on-board circuitry provides a 5v pull-up (if selected in the case of JS4, 5, and 10); the guard circuitry allows an external 12v pull-up to be added without risk of damage to the processor.

Installation is simple. The 3 colour-coded wires of a provided pigtail are soldered to JS7, 10, and 12. Two 2-way socket headers are soldered into JS4/5 and the middle two pads of the 5v/GND header, and a 5-way socket header is soldered into the bottom 5 holes of the DB15 header pad on the left side of the board. The card is inserted into the sockets, and the plug is connected. That's it! The installation of these socket headers does not prevent the use of any other JS-xx function, although it may be easier to run the various jumper wires before inserting the card.

These are currently in stock and ready to ship. Price is US$50 shipped via Canada Post (Small Packet AIr); allow 6-10 business days for delivery.