OH1TV OH1O OH1WX

Memory keyer, 12 messages, 3x4 keypad

I wanted more messages from memory. Keypads are compact and cheap. I selected 3x4 matrix but 4x4 would work as well.

Keypad reading is a bit different from standard push-button. Otherwise the SW is similar with the 5 memory version.

Messages are selected with the keypad

Blue button is "stop the message"

Pot is for speed

Plastic screw is for LED

The box is PP2N

Vintage paddle, make unknown

Connectors on the left are:

power +5V

paddle

programming

keying to TX

PIC Picaxe 20X2 running 32MHz

Black IC's right to PIC are resistor networks

Mini speaker is inside the box

Keypad is matrix type, 3x4

The file is in .txt format. Replace .txt with .bas and you have ready program.

17.7.2014

Pekka