Gman

Member Since: July 3, 2009

Country: United States

  • Product PRT-12042 | about 6 months ago

    Keep in mind that the datasheet specs the minimum gap between 2 conductors as 0.4mm. Conductors spaced closer together than 0.4mm may short together. The Atmega328 in TQFP shown in the video has pin to pin gap of 0.35mm to 0.5mm from Atmel’s datasheet.

  • Product BOB-12009 | about 6 months ago

    Very cool board, but I’m not sure that this will work reliably with 1.8V devices. From the referenced Philips application note the low voltage should be at least 1V higher than the threshold Vgs value of the MOSFET. The BSS138 has a maximum Vgs threshold of 1.5V (1.3V typical), so this circuit should work down to 2.3V, but 2.5V is safer. At 1.8V there may still be enough juice to turn the MOSFET on, but I’m not sure I would trust the results.

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