K3ng Keyer Schematic Repack Jun 2026

The standard 2N2222 keying transistors are retained but augmented with protection circuitry.

: A commercialized version that integrates 99% of the K3NG features into a compact aluminum case . k3ng keyer schematic repack

VE3XYZ (fictitious callsign), a retired EE. The Goal: A field-day keyer with memory banks and a 4-line LCD. The Problem: Original schematics from 2017 showed conflicting pin assignments for the LCD’s RS and E pins. The Solution: He downloaded a “Repack 2024” from Groups.io that included a color-coded wiring diagram for the HD44780 LCD in 4-bit mode. The repack also consolidated the 5V regulator circuit (LM7805) onto the same sheet. The Result: From printing to first CW contact: 3 hours. No magic smoke. The standard 2N2222 keying transistors are retained but

A "repacked" schematic often focuses on reducing the footprint while maintaining reliability. Key areas to simplify include: A tiny and open source CW keyer - Dhakajack - Templaro The Goal: A field-day keyer with memory banks

modules and 3.5mm TRS jacks for paddles (Standard: Tip=Dit, Ring=Dah, Sleeve=GND). Cleaner Audio Path:

: A modern 2023 repack that uses SMD components, galvanic isolation (optocouplers), and a 3D-printed enclosure. SimpleCWKeyer (VE3WMB)