One year and half after discovering my old memory keyer had been dipped in battery chemicals, I finally managed to assemble a replacement. This time I reproduced K3NG's excellent work based on Arduino. I did my little code adjustments to get it working with an Arduino Leonardo clone (ATmega32U4), and now it works the way I need it to.The circuit pictured still misses the internal buzzer for audible feedback, otherwise it is 100% operational.
Now it requires proper housing and power supply. I do want to check its current consumption, just to know how long a battery will last.
Even though the box will need to be "large" to house all those controls, this keyer is a perfect companion for FT817, which lacks memories in its internal keyer.
