Thanks for the quick reply. If nothing is connected i get 5V and 3,3V. As soon as i connect an I2C device, ther is 0 Volts and BP hangs on power-on. The led of the I2C device blinks very short, but thats it. Also i noticed that the USB name changes some times from \USBSER000 to \USBSER001. If i use an external power source all works fine. Only the internal power-source of the Bus Pirate seems to be dead. I also tried on another USB Port, but if BP 3.6 works, all must be fine. Is there anyting else i can do, or just call the vendor for a refund ?
I connect a I2C bus device (RTC) just to the powerlines (3V3 and 5V tested) from the Bus Pirate, select i2c, hardware, 400khz and switch then the power on. After the last step the BP hangs. I have tried 20 times, always the same. With my Bus Pirate 3.6 this works as expected. The RTC consumes 2mA !!! but it look as was the power shortened but there is not shortage. Any idea ?
PS: If i connect nothing to the BP, i can switch on without an hang, but as soon as i connect the RTC, the BP hangs again
