# Shield fo Raspberry PI zero W. #
# Introduction #
This shield created for moving many digital servos as [LOBOT LX-16A or LOBOT LX15D](www.lobot-robot.com).
# Desing #
This shield included microcontroller stm32f413 and st-link scheme on stm32f103 base. Stm32f413 connected to raspberry connector via SPI, UART and I2C interfaces. You can to use stm32f413 as:
- USB/UART bridge for raspberry cons...
It contains a USB to TTL chip, connect to the Pi UART, you can easily access the terminal; INA219 can help you monitor battery voltage and charge/discharge current; You can mount the SD card reader on your Pi as a NAS; You show some information on the OLED display, such as battery voltage, IP address.
This is a Stepper HAT for Raspberry Pi or stand-alone use. It is the board I'm currently using in my SandBot [SandBot](https://robdobson.com/2018/08/a-new-sandbot/) and provides two SilentStepStick TMC2100 positions, two FET drivers for LED light strip or similar and two servo ports. Software is here: [RBotFirmware](https://github.com/robdobsn/RBotFirmware)
This is a Raspberry Pi Zero W hat/shield with USB MIDI input, stereo audio output, 3 user-configurable buttons and OLED display.
To use as an audio card, enable PWM audio output by adding `dtoverlay=pwm-2chan,pin=18,func=2,pin2=13,func2=4` at the end of *config.txt* file.
Remeber that HDMI audio output is the default; use `raspi-config` to force output to 3.5mm audio jack.
If you can't find 47uF...
A stepped-motor controller for three steppers using Trinamics 2130 compatible "SilentStepSticks". Also supports upto two hobby servos and has two power FETs for on/off control of loads (including inductive ones).
Can be used stand-alone using the ESP32 on-board which supports WiFi and a web-based UI when running the [companion software called RBotFirmware](https://github.com/robdobsn/RBotFirmware)...
Template (PCB and interface symbol) to copy for any kind of HAT designs for Raspberry Pi B+. The PCB contains 6 layers with layer display at the lower edge. The assignment of layers is:
- top: signal, polygon connected to GND
- bottom: signal, polygon connected to GND
- layer 1: inner, signal
- layer 2: inner, polygon VCC
- layer 3: inner, polygon GND
- layer 4: inner, signal
Note: geometry tes...
A design to break out the dual micro HDMI ports out to a panel adjacent to the USB/Ethernet ports.
All traces are length matched on high speed differential signals.
This design has not been tested yet, it is currently in production (04/2020)
This has been deisgned to use the BossCon HDD-M-CN09 micro HDMI board edge connectors. Other types will not fit as they all have slightly varying pin spac...
This schematic has a few functions to this circuit. This circuit takes voltages starting from 4V to a max. of 13V. It was an open source project I found online. I've redone this board's schematic. But when it came to de PCB design I kinda lost it. I got as close to sorting the components on the board, but I didn't know where to start connecting wires or how. I'm taking a little break, but if anyon...
HAT or pHAT for Raspberry Pi. Designed with the Pi Zero W in mind, so it shares the footprint of the Zero.
HAT has an ATmega328PB connected via I2C, SPI and UART,allowing both flashing, and many forms of communication.
Included a space for a Mini DC-DC voltage regulator. These are good for 3A of power, but make sure to solder the 5V pads and cut the ADJ pad lead.
Headers for SPI(ICSP) and both...
Raspberry Pi Zero hat/shield with MIDI input, stereo audio output, 3 buttons and OLED display.
OBSOLETE: this version is obsolete. Check new version without the MIDI port, but with improved audio and cleaner schematic https://easyeda.com/account/project?project=2bca68b51d954e19b68cba485984fb42
This is a Raspberry Pi Shield. 12V DC to input. The board will power the Pi through the GPIO using a switch power supply based around the ACT4065A IC. The input 12V comes in through the DC "IN" barrel Jack. Then is turned on and off through the TIP120 NPN Transistor which is controlled through GPIO 4 on the Pi and outputs the barrel Jack labeled "OUT". There is also another TIP120 NPN transistor c...