Sturdy componentry: uses an FTDI USB serial adapter, and Silicon Labs automotive-grade EFM8 controller Supports all I☬ features: 7- and 10-bit I☬ addressing, clock stretching, bus arbitration 3.3 output: output levels are 3.3 V, all are 5 V tolerant Jumpers: color coded jumpers included in each pledge level Three I☬ ports: three identical I☬ ports, each with power and I☬ signals I☬ pullups: programmable I☬ pullup resistors, with automatic tuning Target power monitoring: target device high-side current measurement, to 5 mA USB power monitoring: USB line voltage monitor to detect supply problems, to 0.01 V Fast transfer: sustained I☬ transfers at 400 and 100 kHz Live display: shows you exactly what it’s doing all the time Features - Open hardware: the design, firmware and all tools are under BSD license
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