Digispark ATtiny85 Arduino-enabled Mini USB Dev Board
Complete USB Dev Board Cheap Enough to Leave in a Project
If you have never heard of the Digispark ATtiny board before, it may take you more than a moment to understand its full power and potential. So read this carefully:
Firstly, it's a 20MHz, AVR 8-bit microcontroller with 8 KB flash, 512 bytes of RAM (See the datasheet)
You get up to 5 GPIOs, 4 ADCs, 2 PWMs, 1 SPI and 1 I2C[*]
Secondly, it's fully compatible with Arduino (See instructions here)
Thirdly, it can be directly programmed via USB without needing any other programmer!
And finally, it under Rs. 200!!
[*] There are only a total of 6 pins, so you can't get everything at the same time, of course.
This board was first launched in late 2012 on Kickstarter where it raised $300,000+ in just 30 days. And till today, it remains one of the most popular choices for quick one-off projects that require a controller. Here are some examples from Instructables:
Wearable ring watch http://www.instructables.com/id/ATtiny85-Ring-Watch/
Mini Weather Station
...And Many More!
Before You Buy
Some soldering required: We send you the board, one 6 pin header and 1 3-pin header (see the second picture in the listing). You need to solder the pins yourself before you can connect other components to it.
USB Emulation: The micro (ATTiny85) does not have a proper USB peripheral. Instead it emulates a USB device during boot (you can also use this emulated USB after boot if you want). See here for details
Uploading a Sketch: Due to this USB emulation, the uploading procedure is slightly different for this board compared to normal Arduino. Please follow the instructions in the digistump wiki
This is a great low cost development board, but it is not a full-fledged Arduino. If you have a specific use-case in mind and are not sure of its technical feasibility, please write to us at firstname.lastname@example.org to check before you buy
High Performance, Low Power AVR® 8-Bit Microcontroller
Non-volatile Program and Data Memories
8K Bytes of In-System Programmable Program Memory Flash
Endurance: 10,000 Write/Erase Cycles
512 Bytes In-System Programmable EEPROM
Endurance: 100,000 Write/Erase Cycles
512 Bytes Internal SRAM
2 High Frequency PWM Outputs with Separate Output Compare Registers
USI – Universal Serial Interface (12C, SPI, 1-wire) with Start Condition Detector
4 Single Ended Channels
2 Differential ADC Channel Pairs with Programmable Gain (1x, 20x)
0 – 10 MHz @ 2.7 - 5.5V, 0 - 20 MHz @ 4.5 - 5.5V
Industrial Temperature Range
Low Power Consumption
Active Mode:1 MHz, 1.8V: 300 µA