3. Connectors / Options
The nKeyer was designed to be very flexible, allowing you to decide what you do or do NOT
wish to hook to it. As such there are many options for connections to use. Loosely, these can
be classified as Needed, Recommended, and Optional.
1. Power in (J2: PWR IN Pinout = “+ -“) – 5V (with no buck jumper installed) or 7-23v in
with the Mini-360 buck installed. NEEDED
2. Speed Pot (J4: SPD_POT Pinout = 3 pot pins) – connect to a 10K potentiometer to
adjust the CW speed. Requires the code to be set for the speed pot option. Use this
OR the rotary encoder. OPTIONAL
3. Buttons (J7) – Up to 10 function buttons (determined by the code settings). A typical
configuration requires at least two buttons to be used. Button 1 connects to the top
most two pins (horizontally across from each other), and button two connects to the two
pins next down. Minimum TWO RECOMMENDED / NEEDED
4. Rotary Encoder (J11: Rotary Enc Pinout = “GND, 5V, SW, DT, CLK”) – The
code supports the connection of an inexpensive rotary encoder used with
Arduino projects to control CW speed and potentially other functions. This
style of encoder can be found on Ebay for $1 or less. Search for “Arduino
Rotary Encoder”. This connector is designed to connect straight to an Arduino
encoder as pictured. RECOMMENDED
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