Blog

Measuring air quality with Raspberry Pi #5 - further measurements (with new update: 30th June)

deimosmuc

Multi-day garden measurement I ran the sensor in continuous operation in the garden last weekend including the following Monday. Unfortunately, I did not set the graph in Thingspeak to show more than 2 days. Interestingly, we have a wavy pattern th...
- 22 Jun 2023
Any Measurement to Pi - Blog #7: Direct OCR from Raspberry Pi Camera Image/Video

taifur

In my last two blogs I tried to understand which OCR technique I should use for my project. For getting the answer I have done some research using tesseract OCR and ssocr with some sample images. The lesson I learnt from those experiments is tressera...
- 20 Jun 2023
Any Measurement to Pi - Blog #6: Finding Best ORC Technique for Raspberry Pi (Part 2)

taifur

In my previous blog I illustrated the OCR result for any display that contains seven segment display like multimeter, digital weight scale, blood pressure meter. I foud that tesseract OCR engine is not good enough for reading seven segment display. M...
- 19 Jun 2023
Pollinator Pollster, Part 5: Audio Classification

soldering.on

Pollinator Pollster (Powered by Pi) In this post we'll discuss the audio classification element of this project in much more detail. You'll recall from my last post that I had been forced to make a direction change following withdrawal of sup...
- 18 Jun 2023
Any Measurement to Pi - Blog #5: Finding Best ORC Technique

taifur

In my last blog I prepared my Raspberry Pi 4 for doing OCR using Python. In this blog post I will try to find which OCR technique fits best for my case. I will do some experiment with some images of multimeter, blood pressure meter and digital weight...
- 17 Jun 2023
UI Shenanigans #2

Lannis

Hello everyone! I have implemented some UI elements into my application. Before I delve into the features, I must first explain on how to run the code. All the code is available at https://github.com/lannisraurus/carbon-tools. Compilation First ...
- 16 Jun 2023
Measuring air quality with Raspberry Pi #4 - First measurements

deimosmuc

Over 16 hours the Raspberry PI together with the SPS30 fine dust sensor collected fine dust data from my apartment and garden and transferred it to my Thingspeak.com account. At Thingspeak the sensor data can be visualized on different graphs. The se...
- 16 Jun 2023
Blog #1 - Pi-Sense: A Raspberry Pi-based Environmental Monitoring System for Scientific Experiments

GabrielCuaFagiani

Introduction Problematic One of the most important factors in conducting scientific experiments is ensuring that the environmental conditions are stable and within the desired range. Changes in temperature, humidity, and other environmental factors c...
- 15 Jun 2023
Sci-Pi GPT - 3 Get Lucky with GPT4ALL

vlasov01

Experiments I've spent some time experimenting with different apps, which where build to run LLMs from the edge. As well I was learning about community and key contributors. One of such contributors is Georgi Gerganov (ggerganov). He is one ...
- 15 Jun 2023
Starting out! #1

Lannis

Hello everyone! I apologize in advance for the late notice, and I realize that time is short as of now... I have been struggling quite a bit with university and my finals... Nonetheless, I have been tinkering a bit with the raspberry pi! I managed to...
- 14 Jun 2023
Any Measurement to Pi - Blog #4: Preparing Raspberry Pi for Image Recognition & OCR

taifur

If you already read my previous blogs you know I am going to make a device using Raspberry Pi that will read the measurement from any digital display and convert it to text and number. That will be then used to integrate the measuring device like blo...
- 13 Jun 2023
Raspberry Pi Electronic Lab #3 - Oscilloscope + Logic analyzer

maxpowerr

Oscilloscope For my project, I decided to use a cheap Hantek 6022BE oscilloscope. This is a two-channel oscilloscope with a bandwidth of up to 20 MHz. The device is used in conjunction with a laptop computer and is connected via a USB 2.0 port. The s...
- 11 Jun 2023
Pollinator Pollster, Part 4: Audio Challenges and 3D Design

soldering.on

Pollinator Pollster (Powered by Pi) Welcome to the fourth blog post of this project. This week some big decisions have had to be made about the direction of the project following the discovery that support has been pulled for the machine learning pac...
- 11 Jun 2023
Fixing lots of problems blog #3

GustavoMorales

I really appreciated some comments made on my previous blog, which were very constructive, I started this project not from the beginning but now being aware of what can now happen if connecting directly with the rasp. The first steps were looking for...
- 9 Jun 2023
Portable Environmental Monitoring System: Blog#2 - Identifying The Hardware

meera_hussien

In this blog, we will identify the hardware needed to build this project. The core hardware of this project would be Raspberry Pi 4. The next hardware that we would look into is the power device. Since this is a portable monitoring system, it sh...
- 6 Jun 2023
Any Measurement to Pi - Blog #3: Working with Raspberry Pi Camera

taifur

In this blog post I will show how to connect a camera module to Raspberry Pi, configure it and take image using a Python program. Before getting started let see what type of camera module available for Raspberry Pi and which should work better for ou...
- 6 Jun 2023
Making modules to create Voltage power Supply based on Rasberry Blog #2

GustavoMorales

In my previous blog post, I briefly introduced the concept of utilizing Raspberry Pi as a central control board for various modules. Today, I'd like to delve deeper into one of the fundamental aspects of this idea: the voltage power supply. By harnes...
- 5 Jun 2023
Portable Environmental Monitoring System: Blog#1 - Introduction

meera_hussien

In this project, we embark on a journey to create a versatile and portable solution for environmental monitoring and data collection. With the rapid advancement of technology, the integration of Raspberry Pi—a credit-card-sized computer&m...
- 5 Jun 2023
PiBCI - Post #4 - Making Soft Hydrogel Electrodes and Starting GUI

MarioDL99

Introduction As promised, I will give you updates on the making of hydrogel electrodes. I have already given an explanation on Post#2 why I want to use hydrogel electrodes. I followed the instructions on this paper to make the hydrogel. https://pubs....
- 4 Jun 2023
Measuring air quality with Raspberry Pi #3 - PCB

deimosmuc

Theoretically, you could connect the SPS30 sensor to the IO header of the Raspberry Pi without an interface board, provided that you use the UART interface and find a fully assembled cable (on my cable only the JST connector was connected, the other ...
- 3 Jun 2023
Raspberry Pi Electronic Lab #1 - Сoncept

maxpowerr

Introduction I have accumulated a lot of different devices for signal analysis, this is a USB oscilloscope, a logic analyzer, an SDR receiver, so why not connect all this to a Raspberry Pi and build a whole laboratory for measuring signals around it...
- 2 Jun 2023
Raspberry Pi Electronic Lab # 2 - Monitor

maxpowerr

Introduction For my project, I decided to use an old 17 inch Samsung Syngmaster 173p monitor as a display. The backlights on this monitor have failed, so I'll have to replace them with LED backlights. To do this, I will use the usual 12v cold gl...
- 2 Jun 2023
Measuring air quality with Raspberry Pi #2 - Sensor (Sensirion SPS30)

deimosmuc

Overview In the second part, we look at the SPS30 fine dust sensor from Sensirion. In doing so, we look at the measurement principle, the connector, and the most important sensor features and there is a digression into the WHO recommendations on fin...
- 1 Jun 2023
Pollinator Pollster, Part 3: Radios, Power System, Server

soldering.on

Pollinator Pollster (Powered by Pi) Welcome to the third blog post of this project. In the last week, all components for the first prototype have arrived (yay!), I’ve been able to bench-test the power components and radios, and there has been p...
- 31 May 2023
AI vision Reflective Telescope #2 Install OpenVINO on Raspbian

fyaocn

Install OpenVINO on Raspbian Table of Contents 1 RaspberryPi Spec 2 Raspbian OS 3 OpenVINO runtime 4 Next to do 1 RaspberryPi Spec Even known well by most electric engineers, the technical spec shall be listed below to see how powerful it is, Br...
- 31 May 2023