×

SparkFun Electronics will be closed in observance of memorial day on Monday, May 29th. We will resume normal business hours on Tuesday, May 30th. Any orders placed after 2pm Mountain Time on Friday, May 26th will process and ship out on Tuesday, May 30th.

Gman

Member Since: July 3, 2009

Country: United States

  • 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.

  • 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.

No public wish lists :(