SeeedStudio - Bus Pirate v3.6 - Universal Serial Interface - DIY Maker Open Source BOOOLE USB interface, USB powered. 5volt tolerant pins. 0-6volt measurement probe. 1Hz-40MHz frequency measurement. 1kHz-4MHz pulse-width modulator, frequency generator. On-board multi-voltage pull-up resistors. On-board 3.3volt and 5volt power supplies with software reset. Macros for common operations. Bus traffic sniffers (SPI, I2C). Transparent USB to serial bridge mode. 10Hz-1MHz low-speed logic analyzer. Custom support in AVRDUDE , Flashrom , OpenOCD. AVR STK500 v2 programmer clone. Scriptable from Perl, Python, etc. A bootloader for easy USB firmware updates. Uses DP6037 standard PCB layout. Open source (CC 0/Public Domain).