Multifunctional morse code iambic keyer for competitions
with PIC microcontroler

• variable CW speed, adjustable via poti from 20 to 300 letters per minute (4..60 WPM)
• two message-memories (50..64 letters), each controlled by a pushbutton
• command mode only required for setup and more complex features
• special modes like "endless" calling loop and automatic contest number generation
• very low power consumption: 50..80 uA at 2.4 V supply when active, < 1 uA in standby mode
• simple circuit, can be built on PCB with less than "half matchbox size"
• dash/dot-memory can be turned on and off ("Iambic mode A" and "B")
• controller is clocked by a built-in RC-oscillator with only 50kHz clock frequency
• passive piezo speaker can be connected for "sidetone" generation

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