Digistump / generic · AVR
Digispark ATtiny85
A $3 USB stick with 6 I/O pins, plugged straight into a port. Tiny jobs only — but for tiny jobs it is wonderfully simple.
No wireless5 V logicTiny
Typical price
$3
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Specifications
| Maker | Digistump / generic |
|---|---|
| Chip | ATtiny85 |
| CPU | 8-bit AVR |
| Clock speed | 16 MHz |
| Wi-Fi | None |
| Bluetooth | None |
| Zigbee / Thread radio | No |
| GPIO pins | 6 usable |
| ADC | 4 channels, 10-bit |
| DAC | None |
| Flash | 8 KB |
| RAM | 512 B |
| Logic level | 5 V |
| Power input | 5V USB / 7–35V VIN |
| Deep sleep (typ.) | ~3 mA |
| Active current (typ.) | ~15 mA |
| Form factor | Tiny |
| USB | USB-A (V-USB, bootloader) |
| Programming | Arduino C++ |
| Released | 2012 |
Typical values. Sleep current is approximate; whole-board numbers are higher than the bare chip's datasheet figure.
Pros
- Plug-and-program USB-A stick
- Smallest and cheapest board in this database
- 5 V logic
Cons
- Just 5–6 usable pins, 8 KB flash, 512 bytes of RAM
- Software USB is unreliable on some ports
- Old Windows driver quirks
Best use cases
- 01BadUSB-style keyboards and macros
- 02Single-purpose LED or relay gadgets
- 03PWM fan or LED controllers
- 04Throw-away prototypes
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