Review on π Enhanced UHPPOTE Access Control RFID EM-ID Card Reader with 125KHz Wiegand 26/34 Output by Brent Borseth
Works well as a standard EM4100 reader
These are fairly standard EM4100 readers. They worked great instead of some others I use in projects. The input/output is 5V, which is not suitable for Raspberry Pi or some intolerant 3.3V microcontrollers. I just used a couple of resistors as voltage dividers. I've used 4.7K and 2.2K which have 3.4 across the 4.7K resistor but if you have 2.7K drop 3.1V which works fine too. These readers work with really cheap access systems, search for "EM4100". ". They will not work with standard 26/34-bit HID readers/systems.
- Built-in LED (bi-color LED)
- Socket required
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