Shared projects

the bat board rev3

2 layer board of 1.41 x 0.71 inches (35.7 x 17.9 mm).
Shared on November 20th, 2017 11:03

A teensy-sized breakout board for QFP-48 STM32 MCUs (rev3). Originally designed for STM32L052CxTx, but should work with any pinout-compatible MCUs (most of LQFP-48 packaged STM32s should work, but check the datasheet! Tried with STM32L052C8T6, STM32F072CBT6, STM32F103C8T6).

Intended for low-power applications (e.g. sensors).

Features:

  • hand-solderable (0603, SOT-563 regulator, LQFP-48 (0.5mm pitch) MCU)
  • power options (USB <-> solder jumper <-> VIN <-> regulator <-> solder jumper <-> VDD net) - so it is possible to bypass the voltage regulator entirely; or add a LIPO-charger external module.
  • analogue supply optionally routed through a ferrite bead, and a footprint for an extra stabilising capacitor
  • 1 LED, reset button, user button (routed to BOOT0 and PA1) {hence the user button can be used to enter the built-in bootloader}
  • a footprint for adding an external high-frequency crystal (required for STM32L1* for USB)

More docs


the bat board rev3

2 layer board of 1.41 x 0.71 inches (35.7 x 17.9 mm).
Shared on November 20th, 2017 11:03

A teensy-sized breakout board for QFP-48 STM32 MCUs (rev3). Originally designed for STM32L052CxTx, but should work with any pinout-compatible MCUs (most of LQFP-48 packaged STM32s should work, but check the datasheet! Tried with STM32L052C8T6, STM32F072CBT6, STM32F103C8T6).

Intended for low-power applications (e.g. sensors).

Features:

  • hand-solderable (0603, SOT-563 regulator, LQFP-48 (0.5mm pitch) MCU)
  • power options (USB <-> solder jumper <-> VIN <-> regulator <-> solder jumper <-> VDD net) - so it is possible to bypass the voltage regulator entirely; or add a LIPO-charger external module.
  • analogue supply optionally routed through a ferrite bead, and a footprint for an extra stabilising capacitor
  • 1 LED, reset button, user button (routed to BOOT0 and PA1) {hence the user button can be used to enter the built-in bootloader}
  • a footprint for adding an external high-frequency crystal (required for STM32L1* for USB)

More docs



MKL27Z*VLH4 breakout

2 layer board of 1.21 x 0.81 inches (30.7 x 20.6 mm).
Shared on October 19th, 2015 12:00

A small breakout board for Freescale KL27Z chips that come in LQFP64 package. Just USB (mini or micro), reset button, NMI button, one LED and minimal passive components.

WARNING: This breakout is for MKL27Z128VLH4 and MKL27Z256VLH4 chips. Do not use MKL27Z32VLH4 or MKL27Z64VLH4 chips on it - these do not have the internal voltage regulator, so you would fry the chips on this breakout (Freescale got silly with chip naming once more.)


MKL27Z*VLH4 breakout

2 layer board of 1.21 x 0.81 inches (30.7 x 20.6 mm).
Shared on October 19th, 2015 12:00

A small breakout board for Freescale KL27Z chips that come in LQFP64 package. Just USB (mini or micro), reset button, NMI button, one LED and minimal passive components.

WARNING: This breakout is for MKL27Z128VLH4 and MKL27Z256VLH4 chips. Do not use MKL27Z32VLH4 or MKL27Z64VLH4 chips on it - these do not have the internal voltage regulator, so you would fry the chips on this breakout (Freescale got silly with chip naming once more.)



AVR ISP level translator

2 layer board of 0.94 x 0.63 inches (23.8 x 16.0 mm).
Shared on May 19th, 2015 09:47

Level translator for 2x3 AVR ISP.

Based on GTL2003 chip; jumper to select voltage between 3V3 onboard regulator, ISP voltage, or target board (powered independently); breakout pads for a breadboard.

Designed to be flat (headers mounted on the sides).


AVR ISP level translator

2 layer board of 0.94 x 0.63 inches (23.8 x 16.0 mm).
Shared on May 19th, 2015 09:47

Level translator for 2x3 AVR ISP.

Based on GTL2003 chip; jumper to select voltage between 3V3 onboard regulator, ISP voltage, or target board (powered independently); breakout pads for a breadboard.

Designed to be flat (headers mounted on the sides).



little2wire

2 layer board of 1.03 x 0.48 inches (26.1 x 12.1 mm).
Shared on May 16th, 2015 12:22

SMT version of Little Wire (optional 3V3 regulator and 3V3 operation, optional microUSB or miniUSB connector).

LEDs on power and PB1.

Similar to USBASP-t.


little2wire

2 layer board of 1.03 x 0.48 inches (26.1 x 12.1 mm).
Shared on May 16th, 2015 12:22

SMT version of Little Wire (optional 3V3 regulator and 3V3 operation, optional microUSB or miniUSB connector).

LEDs on power and PB1.

Similar to USBASP-t.