Minimal size pcb for Diodes Inc ZXLD135x and 136x buck converter constant current led drivers. 1210 size input cap, 1210 current resistor, 1206 output cap, sod-123 diode

A Spixels board that provides higher current path to LED-strip connectors to be able to drive more LEDs directly. Ideally >= 2oz outer layers, 1oz inner layers, but OshPark only allows for half.

Power supply for Pi and LED power are separate, so that it is possible to drive LEDs on a different voltage or to reverse the voltage if CLK/DATA needs to be reversed. Provides jumper to connect the LED power to the Pi.

User-Interface HAT for the Raspberry Pi Zero. Note: Attaches to the BOTTOM of the Raspberry Pi Zero Board!

This HAT provides a debounced 6-button keypad interface and three I2C OLED connectors for mounting the little off-the-shelf 128x64 OLED displays readily available as either a single screen centered on the board, or two screens side-by-side.

It also has a connector for Serial I/O for debugging, plus a Real-Time Clock (RTC) module connector that works with the off-the-shelf DS3231 RTC modules.

Though I guess technically not a “HAT” since it doesn’t have the ID EEPROM. But it was eliminated because this board was designed to be used with another HAT board installed at the same time.

Dual CAN FD Interface HAT specifically designed for the Raspberry Pi Zero W. However, it can be used on any of the Raspberry Pi boards, even those with the smaller I/O header, as apart from the HAT EEPROM, only the first 26-pins are used. This version supports CAN FD (Flexible Data rate).

NOTE: This board mounts upside-down on top of the Raspberry Pi, with the NSD10-12S5 Isolated power supply module that goes on the bottom of this board on the outside of the stack. So pay attention to the orientation of the J1 connector connecting to the RPi.

Dual CAN Interface HAT specifically designed for the Raspberry Pi Zero W. However, it can be used on any of the Raspberry Pi boards, even those with the smaller I/O header, as apart from the HAT EEPROM, only the first 26-pins are used.

NOTE: This board mounts upside-down on top of the Raspberry Pi, with the NSD10-12S5 Isolated power supply module that goes on the bottom of this board on the outside of the stack. So pay attention to the orientation of the J1 connector connecting to the RPi.

RasPi Zero SPI/I2C programmer
https://github.com/hexeguitar/FLASH-Pi

ILI9341-based 2.8" color touchscreen

fits 2.8" resistive (tested) or capacitive (not tested) from BuyDisplay

displays snap into the four corner mounting holes and can be secured with double-sided tape

we plan a 3D-printed housing

with ribbon cable buffers and cable impedance matching. Supports at least three feet (tested with 10 feet) of ribbon cable from host connection. This means you need matching buffers and impedance consideration on the controller end too.

Contact me about documentation and BOM: one of many things on my todo-eventually list.

Sample code in this github repo which also co-exists with WIZnet 850io Ethernet module

Light Flicker Sensor v1

Light Flicker Sensor v0

ATtiny85 controls a mux via I2C

Modified version of Moosapotamus' Skippy Tremolo. Layout by storyboardist/Effects Layouts

Replaced NCV8170 3V3, 150 mA LDO and MAX17048 fuel gauge with MAX17222 500 mA boost converter set for 3.17 V output and for powering by a single AAA battery.

C1 - 100nf C2, C3 - 10uf R1, R3 - 100k R2 - 1M C4 - 100uf C5 - 47uf IC - TL072

A tiny handheld game console. https://hackaday.io/project/27629-game

A shield for D1 Mini with a coin battery and charger. https://hackaday.io/project/28104

Use a 3PDT toggle switch to change the order of two guitar fx in one enclosure. Toggle switch can be inserted from the bottom or the top of the pcb. Just follow the ins and outs and you should be fine.

-VERIFIED-

Connects bench power or 2.1mm to breadboard.

EasySensors ButtonSizeNode

The Optical Interrupter Shield V2 board, for ProMini PiDuino HAT, was designed to interface four off-the-shelf optical reflective sensors, such as my QRE1113 Sensor Board, used in raw-sensor mode, to a Raspberry Pi via an Arduino ProMini PiDuino HAT. This board expands on the V1 design with a better on-board debouncing circuit and four sensor inputs instead of only two. It also adds level-shifters to work with either 5V or 3.3V, as driven by the I/O Ref voltage pin.

ERRATA: To work better with the QRE1113 sensor, as this board was originally designed to do, change R3, R9, R15, and R21 from 10K to 47K. This change is necessary to boost the gain of the QRE1113 sensor by about five times, which is needed to get the sensor out of the linear region and into the switching region of operation. Without that change, the sensor will lack enough sensitivity to function adequately for use in the quadrature encoder application it was intended (and probably most any other application too).

ADAT interface for Artix-7 FPGA Audio Mixer