CATEGORIES

Catching Lightning in an IMU
Circuit Cellar

Catching Lightning in an IMU

Simulating Diffusion-Limited Aggregation with a Raspberry PI RP2040 MCU

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10+ mins  |
November 2024
Build an Interactive Kinetic Wall
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Build an Interactive Kinetic Wall

Using a Raspberry Pi 4 and Kinect V1 Camera

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10 mins  |
October 2024
Learn to Program MCUs with uLISP
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Learn to Program MCUs with uLISP

Part 1: Crash Course Offers Insight Into Pioneering Language

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10+ mins  |
October 2024
Intelligent Automotive Battery Sensor
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Intelligent Automotive Battery Sensor

Shunt Resistors and Evaluation Electronics Offer Two Key Components

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4 mins  |
October 2024
Understanding Mesh Circuits How to Use and Calculate Them
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Understanding Mesh Circuits How to Use and Calculate Them

Microcontrollers and other digital systems concern mostly ones and zeros but when connections to the real word are needed it can get messy. Stuart writes about mesh analysis and how mesh circuits can be calculated and applied in practical scenarios.

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10+ mins  |
October 2024
Datasheet: Very Cool Micro Machines
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Datasheet: Very Cool Micro Machines

Smartphone Cooling Rounds Out Parade of Advanced MEMS

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2 mins  |
October 2024
Improving Patient Outcomes
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Improving Patient Outcomes

Device Technology Advances Medical Practices

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10+ mins  |
October 2024
Bringing Cost-Effective, On-Device AI to Home Appliances - Sparse Weights and Interactions Negate GPUs and Cloud Computing
Circuit Cellar

Bringing Cost-Effective, On-Device AI to Home Appliances - Sparse Weights and Interactions Negate GPUs and Cloud Computing

GPU silicon and cloud computing infrastructure are too costly for mass markets devices like refrigerators and washers. By deploying compute resources only to the necessary parts of AI inference, Sparse AI allows product designers to practically incorporate new AI features like natural voice interfaces into their consumer offerings without breaking the bank or electric bill surprises.

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5 mins  |
September 2024
Thin Film Transistor LED Displays - Visual I/O
Circuit Cellar

Thin Film Transistor LED Displays - Visual I/O

To add a resistive touchscreen on top of a TFT display, Jeff explores the technology offerings and libraries needed to accomplish his task. Calibrating the touchscreen's computed coordinates with the actual pixel coordinates of the display proved difficult with a modular framework but separating functions allows easy expansion.

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9 mins  |
September 2024
Mobile APP Development with React Native
Circuit Cellar

Mobile APP Development with React Native

This month, Bob continues his series on mobile app development from an embedded designer's perspective. He programs a React Native app and he offers guidelines for picking a tutorial for React Native. He further explores how it handles concurrency and asynchronous programming. Bob expected a few nuances during the process but to say there were more than a few would be an understatement.

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9 mins  |
September 2024
Power Analysis Over JTAG Ports: Hidden Debug Dangers - Block Side-Channel Analysis Attacks
Circuit Cellar

Power Analysis Over JTAG Ports: Hidden Debug Dangers - Block Side-Channel Analysis Attacks

Small changes in the phase of clock signals can encode power leakages. An attacker can use standard interfaces such as the JTAG port to drive clocks across targets, using them as measurement techniques for sidechannel analysis attacks despite limited physical access. This article demonstrates how you can test devices for vulnerability and how to modify devices to prevent attacks.

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7 mins  |
September 2024
The Blues Wireless Notecard-LoRa
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The Blues Wireless Notecard-LoRa

After having built a number of Wi-Fi IoT gadgets for the home, Brian became curious to see how LoRaWAN-based IoT devices would work. He decided to investigate the Notecard LoRa IoT modules made by Blues Wireless.

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10+ mins  |
September 2024
IoT Protection with MCU Security - Ward Off Attacks with Trust Zones, Encryption, Secure Keys and Tamper Detection
Circuit Cellar

IoT Protection with MCU Security - Ward Off Attacks with Trust Zones, Encryption, Secure Keys and Tamper Detection

Security breaches jumped 107 percent as malevolent forces increasingly focused on IoT devices for side attacks, IP and data theft. Semiconductor vendors supplying on-chip cryptography, memory protection, unclonable technology, random number generation and other measures hope to shut the door on attackers.

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2 mins  |
September 2024
Fill AI with Computer Vision - On the Leading Edge of Adoption in Industrial IoT
Circuit Cellar

Fill AI with Computer Vision - On the Leading Edge of Adoption in Industrial IoT

In just about any factory, production lines hum along like a symphonic orchestra. However, makers of artificial intelligence hardware are pushing transformative technology with mind-boggling productivity gains to unlock unrealized potential. Just how fast will AI seamlessly integrate into the means of production?

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10+ mins  |
September 2024
No Blues with Bluetooth! GATT Explained - Part 5 - Understanding Higher Protocol Layers Provides Interoperability Help
Circuit Cellar

No Blues with Bluetooth! GATT Explained - Part 5 - Understanding Higher Protocol Layers Provides Interoperability Help

After exploring low-level layers of Bluetooth Low Energy in previous editions, and establishing connections in Part 4, Robert examines Attribute Protocol and Generic Attribute Profile or GATT in Part 5. These higher layer protocols provide developers with greater opportunity for interoperability with third-party applications or products.

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10+ mins  |
September 2024
Retro-style Miniature Sports Scoreboard - RGB LED Matrix and Raspberry Pi Provide In-Game Updates
Circuit Cellar

Retro-style Miniature Sports Scoreboard - RGB LED Matrix and Raspberry Pi Provide In-Game Updates

This Cornell University graduate describes how he built a miniature, retrostyle scoreboard that pulls and displays live college and professional sports scores from the ESPN API-bringing the excitement of being at a sporting event to your living room. Pre-game information, in-game scores, and post-game results are displayed on a built-in PiTFT touchscreen.

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10 mins  |
September 2024
Exploring Infrasound - Tornado Early Warning Detection Project Using Raspberry Pi Pico and a Python Supervisory Program
Circuit Cellar

Exploring Infrasound - Tornado Early Warning Detection Project Using Raspberry Pi Pico and a Python Supervisory Program

Inspired by the possibility of building an early warning system for tornadoes, Dev developed an infrasound detector. Tornadoes are rare in his area, but his detector found other infrasound activity using sensor circuitry based on a Raspberry Pi Pico, combined with a Python supervisory program that stores data on a computer for analysis.

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9 mins  |
September 2024
Mitigate Timing and Interference Issues on Multicore Processors
Circuit Cellar

Mitigate Timing and Interference Issues on Multicore Processors

Missing multicore timing deadlines in a driver safety or aviation system is potentially catastropic. Adhering to guidance documents, and employing the appropriate testing and analysis methods ensures the efficient and deterministic execution of critical workloads.

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5 mins  |
August 2024
Getting Directions CHC Proceed to Your Destination Without Having to Ask Someone 40 277
Circuit Cellar

Getting Directions CHC Proceed to Your Destination Without Having to Ask Someone 40 277

Recalibrate your bearings on electronic compasses as Stuart navigates a journey with an MCU-guided compass module leading the way. He tells us how to avoid magnetoresistive effect, and the difference between magnetic north and true north.

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9 mins  |
August 2024
Get More I/O Now! Going Beyond Your MCU's Pin Count
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Get More I/O Now! Going Beyond Your MCU's Pin Count

Small microcontroller design projects often require additional I/O. In this article, Joseph presents several methods of expanding digital and analog I/O for these applications.

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10+ mins  |
August 2024
Datasheet: SBCs On the Edge of AI - To reduce latency, single-board computers take inferencing closer to the source
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Datasheet: SBCs On the Edge of AI - To reduce latency, single-board computers take inferencing closer to the source

A diversity of missions, size, computing resources and power consumption give designers a range of options for choosing the right board to fit the application.

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2 mins  |
August 2024
Tech Overview: Specialized Drones
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Tech Overview: Specialized Drones

Reconnaissance, Surveillance, Making Movies, Heavy Lifting, Package Delivery, Planetary Exploration There's A Mission-Specific UAV For Every Task -

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10+ mins  |
August 2024
No Blues with Bluetooth!
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No Blues with Bluetooth!

Part 4: Bidirectional communication between peripherals and central devices

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10+ mins  |
August 2024
Review of the Siglent SDS812X HD - 12-bit Digital Storage Oscilloscope
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Review of the Siglent SDS812X HD - 12-bit Digital Storage Oscilloscope

After 10 years of experience with his Siglent SDS1202X Digital Storage Scope, Brian was keen to review Siglent's new 12-Bit High Resolution scope, the SDS812X HD.

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10+ mins  |
August 2024
Hit Me Up On TCP - Part 2 Using TCP/IP for transferring data, MQTT is lightweight and simple-to-use
Circuit Cellar

Hit Me Up On TCP - Part 2 Using TCP/IP for transferring data, MQTT is lightweight and simple-to-use

This is the second in a two-part series where Pedro highlights network communication using ESP32 SOC and the ESP-IDF framework. Part two shows how to establish a multiple-end communication through MQTT, with an ESP32 SOC on one end to another end that can be anything capable of communicating through MQTT. Transport fundamentals are covered through a practical example showing how an ESP32-S2 SoC communicates using MQTT.

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10 mins  |
August 2024
RFID Attendance Tracker - Employee Clocking System Arduino Project
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RFID Attendance Tracker - Employee Clocking System Arduino Project

Attendance trackers carry prohibitively high costs for small companies. Andrei shows us how to build a cost-effective, customizable employee clocking system with RFID technology. An Arduino board with Integration Platform as a Service allows attendance tracking with RFID cards to blend seamlessly with popular payroll systems.

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10+ mins  |
August 2024