Time-to-Digital converter plug-on module (shield) for Raspberry Pi B+. The board utilizes a TDC7200 (TI) with a time resolution of ~50ps. The Start/Stop inputs to the TDC can be configured by jumpers from either external signals or coming from one GPIO in case a timing signal is present at this pin from another plug-on board on the same RPi.
Design is work in progress.
Raspberry Pi B+ plug-on module for particle and nuclear physics detectors. The circuit comprises two inputs for typical input signals (PMTs, SiPMs etc.) with typically negative pulses of few hundreds of mV amplitude. Each channel comprises adjustable threshold discriminators for fast timing and a peak detector (only ch1) for amplitude measurement with a slow sampling ADC. Timestamping of the singl...
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...
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...
This projects is a device controlled thru i2C, it has a set of instructions to control two leds, two buzzers and a combination of them.
The device uses an ATTiny85 and it connects to an RaspberryPi to send the commands.
The instruction for the device are:
- 0x00 --> Does nothing
- 0x01 --> All Buzzers ON, All LEDs OFF
- 0x10 --> Al Buzzers OFF, All LEDs ON
- 0x11 --> All Buzzers ON, All LEDs O...
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OBSOLETE: this version is obsolete.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 afforable Geiger Counter that works as standalone device and also can connect to other external devices (like RaspberryPi/Arduino or other GPIO devices) to send the "clicks" thru GPIO interface.
The Arduino code for the Geiger counter is available here:
- Pin D2 --> Arduino interruption
- Pin D7 --> Buzzer
- Pin D8 -->...
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...
Latching Mosfet switch
Based on work at:
R8 allows a shorter wait period on switch hold / raspi gpio driven low
or a 3.3v Zener diode can/should be used to protect GPIO pin
Mosfets are separate devices
In PCB V1 the P-Channel device is TO-220 while the N-Channel is DPAK
Template (PCB and interface symbol) to copy for any kind of shield 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