Generic0

• ML accelerator: Google Edge TPU coprocessor: 4 TOPS (int8); 2 TOPS per watt
• Connector: M.2 (B+M key)
• Dimensions: 22 mm x 80 mm (M.2-2280-B-M-S3)

Application notes

• Get started with the M.2 or PCIe Accelerator
• Manage the PCIe module temperature

Software Guides

• Model compatibility on the Edge TPU
• Edge TPU inferencing overview
• Run multiple models with multiple Edge TPUs
• Pipeline a model with multiple Edge TPUs

API references

• PyCoral API (Python)
• Libcoral API (C++)
• Libedgetpu API (C++)

Downloads

• • Edge TPU compiler
  • Pre-compiled models
  • All software downloads

• Power:  up to 1/4W
• Material:  carbon film 
• Lead diameter:  0.55 mm
• Tolerance : 5%
• Operating Temp :  -55C – 155C

• Resistors basics
• Types of Resistors
• Resistor colour codes

• Model: MB-102
• Colour: White
• 830 solderless point

• Understanding Breadboards

• UTP
• CAT5E

Each board features a self-adhesive backing and a  single board will fit alongside the Raspberry Pi inside most cases - two  boards will fit within the footprint of the Raspberry Pi. There's also  two mounting holes for M2 screws on each board, to anchor them down!

• Modular clip function - rapidly snap and unsnap boards and circuits as your project grows
• Self-adhesive backing.
• M2 Mounting Points (screws not included)
• 170 tie points arrange in 34 rows of 5 pins.
• 3.5cm x 4.5cm
• 9.7mm thick, including sticky foam on the bottom
• Weight: 38.9g

• Understanding Breadboards

• Power:  up to 1/4W
• Material:  carbon film 
• Lead diameter:  0.55 mm
• Tolerance : 5%
• Operating Temp :  -55C – 155C

• UTP
• CAT5E

• Power:  up to 1/4W
• Material:  carbon film 
• Lead diameter:  0.55 mm
• Tolerance : 5%
• Operating Temp :  -55C – 155C

Please note: Due to a change in suppliers the product colour has changed from green/black to red/black as from 25/08/2024.

Just like the one's you used at school, except these one's are new and super sharp!

These low cost wire strippers are excellent for beginners and pro's alike! Spring loaded and adjustable for cable and wire up to 3mm, everyone needs a pair! By fixing the adjustable screw to the desired length (or using the strippers free hand), they can 'strip' the PVC insulation from copper wire for prototyping, breaboarding and any other electronic project you can think of! 

Features

• 5" Stripper and Cutter
• Pressed Steel Stripper for Cables up to 3mm Diameter.
• Hardened and tempered sprung steel blades.
• Red insulated handles.
• Adjustable screw controller.
• Length - 5"
• Cutting Capacity - 3mm

What's in the box?

1 x wire stripper

• Color: Black
• Angle: 270°
• Connector A: HDMI Standard Male to Female

What's in the box?

1 x 270° HDMI adapter

• Make Your Own Ethernet Cables
• Protect your cable ends with these snag free boots for RJ-45
• Helps to Keep Cables from Snags and Rips
• Extend the Life of your Cable

• Material: Rubber
• Dimensions: 27.5×15×15mm (L × W × H)
• Colour: Gray

Cat5e is currently the most commonly used in new installations. It's designed to greatly reduce crosstalk.

It basically means the Cat 5e is better at keeping signals on different circuits or channels from interfering with each other. 

Specifications

UTP Solid.
A step above Cat 5, it can handle 1000 Mbps speeds (gigabit Ethernet) at 100 MHz.

What's in the box?

Sold per meter.
Please indicate via the quantity box how many meters you would like to have.

• Power:  up to 1/4W
• Material:  carbon film 
• Lead diameter:  0.55 mm
• Tolerance : 5%
• Operating Temp :  -55C – 155C

• RJ45 Connector Modular Plug 
  
• 8 Pin Plug for UTP Cat5, Cat5e solid or stranded wire solid or stranded Cable. 
  
• Gold plated leads for better data transmitting and higher signal strength
  
• Colour: Clear

12 Volt 1.2Ah Lead Acid Battery

Ideal for robotics and hobby related projects.

Specifications:

• Housing size: 95mm x 42mm x 52mm
• Weight 510mg

What's in the box?:

1 x Sealed Lead Acid Battery

Mainly used for the power connection on to Laptop Power Supplies (Please check correct for your laptop power supply, some power supplies uses Figure 8 Power cables)

Features

- Cable can be used on electrical appliances up to 250V
- 3 pin Clover to 3-pin SA Electrical Plug

What's in the box?

1 x DEDICATED POWER CORD 

The Raspberry Pi is a great computer but there's just one thing that most hardware hackers will find missing: a few inputs for connecting analog sensors. This is where the MCP3008 chip comes in handy, with eight 10-bit channels accessible over SPI. Thanks to the Raspberry Pi's SPI interfaces and its two 'Chip Select' pins available off of the main GPIO connector, the problem is solved.

Features

• 10-bit resolution
• Four pseudo-differentials or eight single-ended inputs
• Small PDIP size makes for great use in embedded applications
• SPI serial interface
• On-chip sample and hold
• Suppler operation – 2.7V up to 5.5V
• ±1 Both DNL and INL
• 200 ksps sample rate at 5V
• Temperature range from -40°C up to +85°C

Applications

• Sensor Interface
• Process Control
• Data Acquisition
• Battery Operated Systems

What's in the box?

1 x 10-bit ADC 8 Channel IC

Resources

The following sample assumes that you're running the latest official Raspbian distribution, that you're logged in as root and that you haven't yet customized Raspbian to use SPI from a Python script. By default, the kernel module managing SPI communications is not loaded on Raspbian, so let's ensure that the 'spidev' device is available.

root@raspberrypi:/# lsmodModule                  Size  Used by  snd_bcm2835            12808  0  snd_pcm                74834  1 snd_bcm2835  snd_seq                52536  0  snd_timer              19698  2 snd_seq,snd_pcm  snd_seq_device          6300  1 snd_seq  snd                    52489  5 snd_seq_device,snd_timer,snd_seq,snd_pcm,snd_bcm2835  snd_page_alloc          4951  1 snd_pcm  

If 'spidev' device is not listed, we need to remove it from the kernel module 'blacklist' so that it's automatically loaded on the next boot:

root@raspberrypi:/# nano /etc/modprobe.d/raspi-blacklist.conf  

Put a hash character in front of the 'blacklist spi-bcm2708' statement and save the file:

#blacklist spi-bcm2708  

then, manually load the SPI device:

root@raspberrypi:/# modprobe spidev  

The command should just complete without returning an error. Validate the list of modules:

root@raspberrypi:/# lsmod  Module                  Size  Used by  spi_bcm2708             4401  0  spidev                  5136  0  snd_bcm2835            12808  0  snd_pcm                74834  1 snd_bcm2835  snd_seq                52536  0  snd_timer              19698  2 snd_seq,snd_pcm  snd_seq_device          6300  1 snd_seq  snd                    52489  5 snd_seq_device,snd_timer,snd_seq,snd_pcm,snd_bcm2835  snd_page_alloc          4951  1 snd_pcm  

The 'spidev' device should now be available.

Next, install the 'git' package. It will be needed to install other packages from Github.

apt-get install git-core  

Install the 'python-dev' package. It will be needed to compile the 'py-spidev' package.

apt-get install python-dev  

Download and compile the 'py-spidev' package.

root@raspberrypi:/# cd /home  root@raspberrypi:/home# git clone git://github.com/doceme/py-spidev  root@raspberrypi:/home# cd py-spidev/  root@raspberrypi:/home# python setup.py install  

At this point, SPI is available from Python 2.7. Assuming that you have wired the MCP3008 to the Raspberry Pi's SPI bus using CE0 as the 'chip select' pin, you can read all eight analog inputs using the following Python script.

root@raspberrypi:/home# nano adc.py  

Paste the script below in the editor and save it.

import spidev  import time    spi = spidev.SpiDev()  spi.open(0,0)    # read SPI data from MCP3008 chip, 8 possible adc's (0 thru 7)  def readadc(adcnum):          if ((adcnum > 7) or (adcnum < 0)):                  return -1          r = spi.xfer2([1,(8 adcnum)<<4,0])          adcout = ((r[1]&3) << 8)   r[2]          return adcoutwhile True:          for adcInput in range(0,8):                  print "ADC(", adcInput,")=", readadc(adcInput)          time.sleep(1)  

To execute the script

root@raspberrypi:/home# python adc.py  

Sample output using a 10K Ohm trimpot connected to the ADC's pin 3 and all other pins pulled down to ground using a 10k resistor.

ADC( 0 )= 0  ADC( 1 )= 0  ADC( 2 )= 0  ADC( 3 )= 507  ADC( 4 )= 0  ADC( 5 )= 0  ADC( 6 )= 0  ADC( 7 )= 0  

Credits go to Jeremy for his work on the 'py-spidev' Python module which makes working with the MCP3008 straight forward. Alternatively, checkout wiringPi's SPI functions if you prefer using a 'C' API.

Related Tutorials & Samples

• Loading I2C, SPI and 1-Wire drivers on the Raspberry Pi
• Jeremy's Blog: Raspberry Pi hardware SPI analog inputs using the MCP3008
• wiringPi 'C' API for interfacing with SPI, I2C, GPIOs and more
• Adafruit Learning System
  • Save and Graph Analog Temperature Data
  • Converting analog inputs to digital and control audio volume

ReSpeaker 2-Mics Pi HAT is a dual-microphone expansion board for Raspberry Pi designed for AI and voice applications. This means that you can build a more powerful and flexible voice product that integrates Amazon Alexa Voice Service, Google Assistant, and so on.

The board is developed based on WM8960, a low power stereo codec. There are 2 microphones on both sides of the board for collecting sounds and it also provides 3 APA102 RGB LEDs, 1 User Button, and 2 on-board Grove interfaces for expanding your applications. What is more, 3.5mm Audio Jack or JST 2.0 Speaker Out are both available for audio output.

Note: This product does not include the Pi Zero board!

Features

• Raspberry Pi compatible. 
• Supports: Raspberry Pi 5
  Raspberry Pi 4
  Raspberry Pi 3B+
  Raspberry Pi 3B 
  Raspberry Pi 3A+
  Raspberry Pi 2
  Raspberry Pi Zero 2
  Raspberry Pi Zero
  NVIDIA Jetson 
• Dual-Microphones
• 2 Grove Interfaces: support GPIO and I2C
• Programmable Button and LED: one button and three LEDs
• Stereo Codec with Class D Speaker Driver
• Two types audio output socket : 3.5mm Audio Jack(40mW output ), JST2.0 Speaker Out(providing 1W into 8Ω loads)
• Far-field support (up to 3 meters)
• Application ideas:
  • Voice Interaction Application
  • AI Assistant
• PCB dimensions: 65mm x30mm x15mm
• Gross weight: 33g
• Product weight: 11.6g

• BUTTON: a User Button, connected to GPIO17
• MIC_Land MIC_R: 2 Microphones on both sides of the board
• RGB LED: 3 APA102 RGB LEDs, connected to SPI interface
• WM8960: a low power stereo codec
• Raspberry Pi 40-Pin Headers: support Raspberry Pi Zero, Raspberry Pi 1 B+, Raspberry Pi 2 B, Raspberry Pi 3 B, and Raspberry Pi 3 B+
• POWER: Micro USB port for powering the ReSpeaker 2-Mics Pi HAT, please power the board for providing enough current when using the speaker.
• I2C: Grove I2C port, connected to I2C-1
• GPIO12: Grove digital port, connected to GPIO12 & GPIO13
• JST 2.0 SPEAKER OUT: for connecting speaker with JST 2.0 connector
• 3.5mm AUDIO JACK: for connecting headphone or speaker with 3.5mm Audio Plug

What's in the box?

1 x ReSpeaker 2-Mics Pi pHAT

Application

Get started with Google Assistant

How to use button to trigger Google Assistant

Resources

• Getting Started, wiki.seeedstudio
• Respeaker 2-Mics Pi HAT SCH, pdf
• Respeaker 2-Mics Pi HAT PCB, pdf
• Respeaker 2-Mics Pi HAT SCH, zipped file
• Respeaker 2-Mics Pi HAT PCB, zipped file
• ReSpeaker 2 Mics Pi HAT 3D, zipped file
• Seeed-Voice Driver, GitHub
• Algorithms includes DOA, VAD, NS, GitHub
• Voice Engine project, provides building blocks to create voice enabled objects, GitHub
• AEC