P2DMD Hardware

Parts for minimum est :

Per PCB Qty What Why NZ$ NZ$ Est or Act On hand
1 PCB PCB  $   10.00  Est No
1 IDC Connector 2×8 DMD Out  $     0.50  Est Check
1 IDC Connector 2×7 DMD In  $     0.50  Est No
1 IDC Ribbon cable 16p DMD Out  $     1.00  Est AX 20161228
2 2×25 SIP female headers STM32 F4  $     2.00  Est No
1 2×1 Sip Screw terminals Power  $     0.30  Est Yes – Q1000
NZ$0.20 landed
1 DC Jack Power  $     0.30  Est Yes Q250
NZ$0.20 landed
1 LED Power  $     0.10  Est Yes various
NZ$0.10 landed
1 300R for LED Power Led  $     0.05  Est Yes 510R
NZ$0.05 landed
6 270R DMD In  $     0.10  Est Yes array SMD
4 x R NZ$0.05
6 Ceramic 68pf DMD In  $     0.05  Est Yes 47pF Q1000
NZ$0.02 landed
1 SDCard connector SDCARD  $     2.00  Est Yes Q90
NZ$1.70 landed

Power options:

Need high currrent 5V

Suggest AC to DC switching PSU powered off high voltage AC  no longer needed by Dot matrix controller board.  Looking at that boards schematic:

  • Sheet 4 of 4 has power supply portion
  • J605 provides 2 separate AC supplies which after rectification/regulation pass +62V, -113V, -125V along with a common ground output via J604 to the DMD controller board
  • Since the Dot matrix controller board passes these through after rectification/regulation, and P2DMD doesn’t need them, we can disconnect the AC (input) side from the Dot matrix controller board and pass them instead to our own AC to 5VDC PSU

J605 on Dot matrix controller board:

  1. AC Supply pair 1 80VAC (White/Green)
  2. AC Supply pair 1 80VAC (White/Green)
  3. AC Supply pair 2 100VAC (Violet)
  4. Key
  5. AC Supply pair 2 100VAC (Violet)

So we will intercept the 100VAC supply side.  We will also test the 80VAC side as well looking for any power efficiency of 80VAC vs 100VAC.  Also I am curiious to see how well the switching AC to 5VDC psu’s handle lower AC input


3.96mm = .156″ so referred to as both KK 396 & KK 156 series