If you order a set of these, please consider buying me a coffee
Improved rev 3! (not tested yet - order at own risk) order as a flex PCB (or at most 0.8mm regular PCB) for best fit. Intermediate board to allow a drop-in replacement of an improved RGB video encoder chip CXA1645 in place of the usual CXA1145 on Amiga A600/A1200 models. Resistor/Capacitor sizes are all 0603 and the values are listed on the silkscreen. The 16K R needs to be a 1% tolerance (or accurately tested) resistor and Y/C connections are broken out for S-Video mods to be attached (extra 75R + 220uF RC components needed in line with each) This may be applicable to other uses of the CXA1145 if it’s the same SMD package as the Amiga variant and there is sufficient space around the ends for the passive components.

Solder jumper should connect center pad to VIN. 9-pin connector: DigiKey P/N 455-1809-2-ND Pin header is 0.1" pitch; I recommend right angle socket header, mounted on the side of the silkscreen illustration.

1.27 to 2.54 PIN header adapter to flash shelly dimmer 2 and shelly 2.5

STEMMA_MPU_Backpack. A simple “basement” backpack to add a Stemma or Stemma-QT connector to any Feather MPU or FeatherWing. The backpack simply connects the default I2C pins to the Stemma JST (SH or PH) pads. The backpack PCB is designed to be attached to the bottom side of a Feather by soldering the 3V3, GND, SDA, SCL, and RESET (for mechanical strength) holes to the Feather’s existing, presoldered pins.

Vesper “Zero-Power Listening” PDM microphone with wake-on-sound. Fixed footprint (was reversed) and added I2C pullups.

Shim adapter to allow RPi serial console to be used with other hats (provided that they don’t use the UART pins). Optional 5V supply via jumper. Manufacture as 0.8mm thickness PCB.

To use with 7-segments … or leds… or anything. Allow you to PWM 15 leds, or 5 RGB led, and more if you chain multiple boards. Perfect for FastLed on Arduino (works the same as a WS2812b led strip).

Component:

• WS2811
• 104/100nf 0603 capacitor (left of WS2811)
• 101/100ohm 0805 resistor (above WS2811)
• 330/33ohm 0805 resistor (above capacitor)
• Appropriate 0805 resistor for each led. Use this calculator with CMN_A voltage and your led’s voltage+current.

  Connection:

• VDD=5v
• GND=Ground
• CMN_A=External power for leds. Can be 12v, 5v, 3v, or anything. All 4 pins are connected together, and to nothing else. Take 1 for input, 1 to your leds anode pin and 1 for the next board. Named CMN_A to remind you to buy “Common Anode” RGB led only :)
• 0R,0G,0B,1R…=Cathode pin of your led. If CMN_A isn’t VDD, make sure CMN_A’s ground and VDD’s ground are connected.

WS2811 datasheet

Good luck JF Gagnon

https://github.com/edgecollective/co2-remote-and-gateway/tree/master/rev_e/atkins

https://github.com/edgecollective/mothbot/tree/main/ver4B/hardware

Adapter board to replace a ½ AA lithium battery holder with a 2032 battery holder.

BOM: Würth Elektronik 79528211 2 header pins