Wiring Guide
Building a Longrage Doppelgänger Reader
Doppelgänger Breakout Board
The Doppelgänger Breakout Board is the recommended way to get Doppelgänger RFID up and running on your HID MaxiProx or iCLASS R90SE reader.
- It reduces wiring and the margin of human error greatly
- It enables the use of a single power soure to power the reader and Doppelgänger
- it allows for a stable installation with air passthrough above and below electronic components
We recommend using 22 AWG Solid Wire for connections between the Doppelgänger Breakout Board and your reader. Additionally, we recommend using a system to tie down your power cable to prevent unintental damadge from pulled cabling. An adhesive backed zip-tie mount will work.
While the Doppelgänger Breakout Board states that the maximium input voltage is 15V, you can supply up to 28VDC ONLY IF YOU USE ACTIVE COOLING on the LDO (chip indicated by the HOT symbol). Additionally, the power input is a passthrough circuit. This means that whatever voltage you supply to the Doppelgänger Breakout Board will be passed through to your reader. Ensure that your reader is rated for the voltage that you intend to supply. Do this at your own risk!
The following wiring diagrams should be used for connecting the Doppelgänger Breakout Board to your reader(s):
R90SE with Doppelgänger Breakout Board
MaxiProx with Doppelgänger Breakout Board
Individually Sourced Components
For manual installation using off the shelf components, reference the Doppelgänger Github repository. Pay attention to the GPIO mappings, as they’re inverted on the photos in the GitHub repository.