Schematic and PCB for a dekatron-like LED display. Based on ATtiny1616 microcontroller with serial and pulse interfaces. 0805 LEDs and resistors for ease of hand soldering.
| Signal | ATtiny1616 port | ATtiny1616 pin | LED |
|---|---|---|---|
| LED0 | PA5 | 3 | D1 |
| LED1 | PC3 | 15 | D2 |
| LED2 | PC2 | 14 | D3 |
| LED3 | PC1 | 13 | D4 |
| LED4 | PC0 | 12 | D5 |
| LED5 | PB3 | 8 | D6 |
| LED6 | PB4 | 7 | D7 |
| LED7 | PB5 | 6 | D8 |
| LED8 | PA7 | 5 | D9 |
| LED9 | PA6 | 4 | D10 |
| LEDDP | PB1 | 10 | D11 |
| PWM | PB0 | 11 | |
| TxD/SDA | PA1 | 17 | |
| RxD/SCL | PA2 | 18 | |
| DEBUGTxD | PB2 | 9 | |
| PULSEIN | PA3 | 19 | |
| PULSEOUT | PA4 | 2 | |
| RESET/UPDI | PA0 | 16 | |
| Vcc | Vcc | 1 | |
| GND | GND | 20 |
Pin assignments chosen by proximity on PCB layout.
2x4 pin 2.54mm header, male, on rear of PCB, with all interface connections and programming pin.
Ring of 8 solder pads for connection to an octal valve base.