I'm happy to announce our first three products. I'm currently working on opening a web store and locating distributors to sell them as well. Without further ado, here they are, with prototype images:
This is the first product in our 1X3 line. The 1X3 line is a common form factor that will encompass a broad range of input and output boards. Due to the common form factor, they can use a common line of single and multi-board enclosures. The first board in this line carries six high-current, high-side switches capable of handling 5A at 30VDC each. Each switch has a A shift register controls the switches off of only four digital lines. In addition, the overflow of the shift register comes out on the connector, allowing the user to daisy chain as many as fifty of these boards for a total of 300 channels.
This Arduino shield carries the same type of switches as the hex switch board, and like that board, uses a shift register interface. The shield carries and expansion connector with a pinout that matches the hex switch. Therefore, you can mix and match them on a single daisy chain cable. Up to twenty-five of these boards can be daisy chained together, giving a total of 400 channels off only four Arduino pins. The board is shipped with the Arduino and expansion connectors provided but not installed. This allows the user to install the connectors as required for their particular application.
Wheatstone bridge circuits are used with a wide variety of different types of sensors, including millivolt pressure transducers, load cells, strain gauges, and RTDs. Since the output is proportional to the excitation voltage, a precisely regulated voltage is required. This board provides both precision excitation and amplification. The user can select one of four different exciation voltages (1.24V, 2.5V, 5V, and 10V) via solder jumper.
The power supply circuitry generates internal supply voltages that permit a bipolar ±10V output off a single-ended input voltage between 6VDC and 30 VDC. The gain is programmed by a single resistor. The board is shipped with no gain resistor installed so that the user can solder in the appropriate gain resistor for their particular application. The board ships with two gain resistors sized for load cells and pressure transducers with outputs of 2 mV/V or 3 mV/V.
Coming next, pictures of the test jigs for all of these boards.