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Wiegand Board
Ted Markson edited this page Mar 1, 2014
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3 revisions
The Wiegand Board is part of the MakerPass platform and designed to handle low-level input, output and wiegand interfaces commonly used for access control.
- RS-485 full duplex communication (Exar SP491E)
- Dedicated Wiegand device interface
- 6x Inputs (5V analog compatible)
- 6x Outputs (5V level)
- Onboard power 5V regulator for logic
- Added transistors atop opto-isolators for switching DC current
- Added another set of termination and pullup / pulldown resistors to Last Node jumpers.
Now the First and Last Node jumper sets are separate! - Added another decoupling cap on the regulator.
The power supply was funky with only one installed and caused odd behavior on the ATMega - Fixed Novalabs logo
- first revision
| Wiegand Board PIN NAME | ARDUINO PIN # |
|---|---|
| WIEGAND D0 | 2 |
| WIEGAND D1 | 3 |
| RX | 30 |
| TX | 31 |
| DE | 18 (A4) |
| RE | 19 (A5) |
| INPUT1 | ADC6 |
| INPUT2 | ADC7 |
| INPUT3 | A0 |
| INPUT4 | A1 |
| INPUT5 | A2 |
| INPUT6 | A3 |
| OUTPUT1 | 5 |
| OUTPUT2 | 6 |
| OUTPUT3 | 7 |
| OUTPUT4 | 8 |
| OUTPUT5 | 9 |
| OUTPUT6 | 10 |
| STATUS | 4 |