[ScorpiusWireless]

Hi Guys,
   We have made 7 lots of hardware changes to the MPD design. Here’s a progress pic. 
Still 22.3x13.3x2.0mm.
Sadly we didn’t get to include the second radio chip as mentioned previously due to cost, complexity and increase in board size. However we did add or modify some things.

Improvements include:
1.Main onboard SMD capacitor upped to 141uF
2.Pin connections for lighting super capacitor which will connect on a fly lead.
3.Creating a new multi purpose 4 pin port that can port the following:
a. Comms (wired)
b. OLED screen
c. Hall sensor
d. Brushless motor driver connection

4. Addition of a snap off board that solders to your motor can for better back EMF protection. Yet to be added.
5. Reconfiguring existing LED circuitry and drivers.
6. Reconfiguring diodes to better suit Carrera compatibility.
7. Reconfiguring power in and motor drive out pin positions to better suit Scorpius and Carrera.
   
   
   

[ScorpiusWireless]

Here’s the protection chip added. Once snapped off use side cutters to cut where the red lines are shown and discard the 4 tiny pieces. Then use a 25W soldering iron to solder to motor can.
   

[ScorpiusWireless]

Here’s another nice addition to the MPD V2.0.
The previous 3 pin port for the hall sensor has now been upgraded to a flexible and configurable 4 pin port.

Here’s the 4 ways it can be configured:
1. 0V/TX/RX/3.3V for comms.

2. 0V/S/H/3.3V where H is analog or digital hall, S is spare.

3. 0V/SCL/SDA/3.3V for OLED.

4. 0V/SCL/SDA/3.3V for Brushless driver connection.

The 4 pins are shown in the green rectangle.

Lots of future opportunities here….

   

[ScorpiusWireless]

Here’s version 3.0
We decided to upgrade the external super capacitor circuit and get rid of a bridging wire scenario that previously needed to be in place should a super cap not be employed for lights. Good super capacitors aren’t cheap either so this optional method not only reduces board size it makes it more affordable. So now just 2 pins instead of 3 for the connection.
Next we added a 5.0V regulator and a couple of capacitors to the board.           Again John somehow did this without increasing board size which is currently at 23.00x13.30mm.

You may notice also different shapes around the pins around the border of the board. You may notice different shapes around each pin. Each shape represents positive, negative or other for easier wiring and analysis when troubleshooting.

Here’s the (what we think may be) final prototype design. Time will tell.

   

[ScorpiusWireless]

Hi Guys,

The all important wiring diagram.
   

[ScorpiusWireless]

Hi Guys,
    The production wiring spec is both written and drawn. Here’s the various wire types, colours, gauge, plugs, LEDS, photo transistors to attach to the BOM.    

[ScorpiusWireless]

Ok     Here she is, the MPD V4 decoder exists. 13 products from one piece of hardware is the plan. It’s time to program these and add a few wires. Exciting times. We will now have the hardware necessary to continue programming and testing.

[ScorpiusWireless]

Here’s the bottom side.