2021 Update : Dump the Digistump

As Adafruit also remarked for its Protrinket 3V: the bitbang USB technique doesn't work as well as in 2014.  The Digistump still works when directly connected to my Thinkpad laptop (on Linux), but not when connected through a USB-hub.  On Windows, it doesn't work at all.

So another platform will be needed with native USB.  I think of the Adafruit Trinket M0 or the Seeeduino XIAO.  The annoying thing is that the Robosapien wedge is mounted using the mounting holes of the Digistump.  We'll have to fix that.

For your reference, the historical Digistump info can be found here below.

Where to buy?

• Digispark website
• AliExpress
  • This clone has two mounting holes, which is an advantage over the original Digistump.  
  • The LED is on P1, not on P0.

Installation

Follow the instructions on:

• Connecting and Programming Your Digispark (to install the Digispark Board Manager URL)
• Linux troubleshooting (to fix the udev rules)

Programming

The Digistump clone is shipped with a functioning bootloader.  

To program the application: first click verify, after that power on the Digistump.

Further reading

Marcus Jenkins wrote an interesting tips & tricks to get you started with the Digistump clone.

Use a USB hub with a power switch for every outgoing USB port.  As such you can easiliy reprogram the Digistump without having you to replug it to the USB-port every time.

The schematic can be found here.