The K3NG firmware is susceptible to . If your voltage drops below 4.5V during a transmission, the Arduino resets. This is catastrophic during a contest.
) is used to key the radio. The Arduino sends a "high" signal to the transistor base, which then pulls the radio's key line to ground. k3ng keyer schematic
Let’s pretend you want to build the "Minimum Viable Keyer" but using the Official K3NG Schematic v2.0. The K3NG firmware is susceptible to
Sidetone (audio)
D8 (Key Out) ------[1k]----- Base of 2N2222 Emitter ---- GND Collector ---+----- to Radio Key Input | [10k]--- +5V (pull-up, if needed) (for radios that need high) k3ng keyer schematic
The foundation of most K3NG builds includes these primary circuit blocks: HL2 and OpenCWKeyer K3NG Winkeyer - Google Groups
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