Member #254349

Member Since: September 26, 2011

Country: United States

  • I had an issue with unstable operation of this board + USB joystick + Arduino Uno. It worked for a while, then stopped. After some debugging with scope I realized that there is no 3.3V -> 5V voltage translation on MISO pin. * MAX3241 Voh = VL - 0.4V = 2.9V. * ATmega Vih = 0.6Vcc = 3.0V This board does not have to work with 5V Arduino boards. Adding LVC1T45 voltage translators between MAX3241 outputs MISO and GPX and Arduino pins D12 and D8 Seems to fix the problem. Schematic is here

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