electronic iambic keyer

with command funktion and request tranceiver on board

It is a minimalist device based on:

The code directory has the files to be installed on the Seeed Xiao device.

now pcb board simple soldering connectors on rp2040, and or assembly it a box

Command Hit the Command button an morse letter:

• a -> Iambic Mode A

• b -> Iambic Mode B

• m -> request Iambic Mode A/B

• ? -> request value of ...

• i -> TX_opt enable(on) disable(off)

• j -> TX_transceiver enable(on) disable(off)

• o -> Sidetone toggle (on) (off)

• f -> adjust sidetone frequenz

• v -> adjust sidetone volume 1-100

• q -> adjust qrg of tx

• w -> adjust WPM (Word per minute)

• t -> tune mode, end with command mode

• s -> save parameter to file

• x -> exit Command mode

On rp2040 pin toggle with 7.xxx xxx MHz

simpel code def tx_toggle(): wrap_target() set(pins, 1) [1] set(pins, 0) [1] wrap()

you can receive the cw signal on qrg:

1. Install Thonny latest version.

2. connect to a Raspberry Pi Pico

3. copy imabic_keyer_rp2040.py and json_iambic.json to rp2040

4. open the file imabic_keyer_rp2040.py and test the keyer

5. when all ok save the program as main.py

6. is the json file wrong, you an start in factor mode, press command-button at boot time.

Main Paramter are setup in json file.

• "{
• "txt_emable": 0,
• "sidetone_volume": 10,
• "sidetone_freq": 700,
• "sidetone_enable":1,
• "tx_enamble": 0,
• "iambic_mode": 16,
• "wpm": 18
• }"

Setup Hardware pin on rp2040

comand_button = 15 onboard_led = 25 extern_led = 3 tx_opt_pin = 10 tx_pin = 18

cw_sound_pin = 22 paddle_left_pin = 17 paddle_right_pin = 18

KIS -> keep it simple

• J2 2.5mm jack (for keyer, headphone)
• optocoupler for Tranceiver connect
• Button for coammdnmode
• option for externel coammnd led

Some Ideas / obtions on demand:

• power save mode
• wpm conrol with potentiometer

MarkWoodworth xiaokey (https://github.com/MarkWoodworth/xiaokey)