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 CAY16-221J4LF 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:
- AC Supply pair 1 80VAC (White/Green)
- AC Supply pair 1 80VAC (White/Green)
- AC Supply pair 2 100VAC (Violet)
- Key
- 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
https://www.molex.com/molex/products/family?key=kk_396&channel=products&chanName=family&pageTitle=Introduction&parentKey=kk_interconnect_solutions
3.96mm = .156″ so referred to as both KK 396 & KK 156 series
xxx