Shared projects

USB Micro ISP v1.4

by nsayer.

2 layer board of 1.50x0.80 inches (38.13x20.32 mm).
Shared on February 25th, 2015 21:22.

A voltage-agile SMD AVR programmer. QFN/SSOP variant.

This version adds a recovery clock pin. With a slight mod to the firmware, the recovery clock pin will have a 500 kHz square wave during programming.

BOM:

  • R1 10K
  • R2 & R3 150R
  • R4, R5 & R6 1.5K
  • C2 & C5 0.1µF
  • C3 & C4 22pF
  • C6 1µF
  • C7 2.2µF
  • D1 & D2 1N4148
  • Y1 12 MHz
  • IC1 ATTiny2313
  • IC2 74HC365
  • IC3 3.3 volt LDO
  • IC4 AP2331
  • PROG Red 0805 LED
  • CONN Green 0805 LED
  • JP4 Micro USB-B
  • F1 500 mA PTC

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FFC 10 breakout

by nsayer.

2 layer board of 0.50x1.10 inches (12.70x27.94 mm).
Shared on January 24th, 2015 17:30.

For OpenEVSE / Hydra debug and dev.

Ironically, this design was created, uploaded and ordered during a power failure.

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Toast-R-Reflow, Controller & LCD backpack (84)

by nsayer.

2 layer board of 3.15x1.40 inches (80.04x35.59 mm).
Shared on January 22nd, 2015 23:06.

This is the Toast-R-Reflow controller “backpack.” It mounts on the back of a 80x36mm 2x16 LCD display.

This variant has an ATTiny84 and an AD8495 analog thermocouple amplifier. It’s cheaper than the model II controller, but the flash is full, so there’s no room for more features.

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Toast-R-Reflow, Controller & LCD backpack II

by nsayer.

2 layer board of 3.15x1.40 inches (80.04x35.59 mm).
Shared on January 22nd, 2015 23:05.

This is the Toast-R-Reflow controller “backpack.” It mounts on the back of a 80x36mm 2x16 LCD display.

This variant uses an ATMega328P controller and a MAX31855 thermocouple amplifier. It’s more expensive than the model I controller, but there’s lots of room for more features in the flash, it has connections for 3 buttons instead of just 1 and an FTDI serial port. Also, the MAX31855 has a much wider temperature range while having higher resolution.

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Round holiday ornament

by nsayer.

2 layer board of 2.02x2.12 inches (51.31x53.72 mm).
Shared on December 10th, 2014 18:26.

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