Everything for Electronics
Posted in: Nuts and Volts (October 2013)

Introduction to the JTAGulator

Details, engineering documentation, and purchasing information are available from: http://www.jtagulator.com

This video features firmware v1.0. The command and feature set has since changed (slightly). The latest firmware can always be retrieved from: http://www.github.com/grandideastudio/jtagulator/


  • 24 I/O channels with input protection circuitry
  • Adjustable target voltage for level translation: 1.2V to 3.3V
  • Supported target interfaces: JTAG/IEEE 1149.1, UART/asynchronous serial
  • USB interface for direct connection to host computer


DerbyCon - Jtagulator Assisted Discovery Of On Chip Debug Interfaces by Joe Grand