This breakout board is designed for the HTSSOP-38 package used by the PCA9956B 24-channel I2C constant current LED driver. There may be other ICs that use this same package.

This board uses the recommended pad layout specified in the PCA9956B datasheet, which includes larger pin 1, 19, 20 and 38 pads, plus a pad undernath which is connected to a copper fill on the rear of the board.

Traces are 9 mil, except for pins 1, 19, 20 and 38 which are 17 mil.

A small breakout board for the RFM95W/SX1276 LoRa module.

• Cheap - about 1" x 1".

• Fits standard breadboards.

• Has the option for fitting an SMA antenna on-board by populating R1 with 0R 0603 resistor.

• Includes de-coupling caps on rear - recommend to use C1 0.1uF and C2 10uF 0603s.

• Has silkscreened area on the rear for recording info - such as the frequency of the device.

Designed for a CP2104 USB to UART bridge, broken out suitable for breadboard prototyping.

Note that centre pad isn’t grounded, and there is no ground plane.

A minimal footprint breakout board for the ESP-32S module. Untested.

Ghetto PoE 5V v0.1

A board designed to take 5v from a micro USB connector and send it down a CAT5/CAT6 cable for breakout and use at the remote end.

The board sends power down all 4 pairs, so the current carrying capacity is maximised, and should be good for around 500mA. Note that voltage drop will be an issue over long cable runs.

The BOM is pretty basic:

• An RJ45 port, with LEDs (of which only the right, green, one is used to indicate power). I’ve used the Amphenol RJHS-4081.

• Micro USB PCB mount connector. I use cheapos from aliexpress.

• A current limiting 0603 resistor for the LED - I’m using a 1.5K to keep power use down.

• A 1206 0.5A hold current, 1A trip current resettable fuse. I’m using Littelfuse 1206L050YR.