Spark Circuitry

This article was originally sent as our daily newsletter on March 31, 2026. Subscribe free to get it in your inbox every day. 🔌 SparkCircuitry Daily — March 31, 2026 Hey maker, Today: a family calendar that wakes up once a day, chip prices are rising (again), and a WiFi-controlled robot dog you can 3D-print… Read more: Daily Newsletter: line:** Can you really run an ESP32 calendar for a year on one battery?

Over 50 billion units sold. More than 60 years in continuous production. Still specified into new designs today.

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Ever wondered what the temperature and humidity actually are in your backyard versus what the weather app claims?

Free Daily Electronics Newsletter Difficulty: BeginnerTutorials, news, and one component explained simply — every day. Subscription Form Subscribe 🔧 Featured Project A maker has built a hydropower generation circuit that generates power from a water pipe in a building using a microturbine, with the generated electricity used to charge batteries for emergency lighting or other… Read more: Daily Newsletter: Why water pipes might power your next project

You’ve just ordered an exciting new sensor from AliExpress. The package arrives, you tear it open, hold the tiny chip in your hand… and then reality hits.

SparkCircuitry Daily ⚡ SparkCircuitry Daily Free Daily Electronics Newsletter Photo by Patrick Winzler on Pexels Difficulty: BeginnerTutorials, news, and one component explained simply — every day. Subscription Form Subscribe Friday, March 28, 2026 🔧 Featured Project A maker has built a simple optocoupler tester circuit for fault detection . Optocouplers frequently fail without visible damage… Read more: Daily Newsletter: Can a Memory Chip Shortage Really Last Until 2030?

You’ve probably seen those expensive commercial IoT sensor systems that cost hundreds of dollars.

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You’ve probably used a regular mechanical switch hundreds of times today—light switches, keyboard keys, your phone’s power button.

Free Daily Electronics Newsletter Difficulty: BeginnerTutorials, news, and one component explained simply — every day. Subscription Form Subscribe 🔧 Featured Project A maker has built a hand gesture control robot using OpenCV and MediaPipe for real-time hand tracking, allowing users to control a rover’s movement wirelessly with just their hand movements captured by a laptop… Read more: Daily Newsletter: Why MOSFETs are secretly running your life

Every electronics hobbyist eventually realizes they need a proper bench power supply. Commercial units with adjustable voltage and current limiting can easily cost $100 or more.

Hey there! It’s Monday, March 24, 2026 — time for your weekly dose of electronics inspiration.

Pulse Width Modulation sounds complicated, but the concept is surprisingly simple.

A maker has built an advanced keyless security device using the CrowPanel 1.28-inch-HMI ESP32 Rotary Display, which integrates a touch screen, physical button,…

Ever killed a houseplant because you forgot to water it? Or worse, drowned it with too much love? You’re not alone.

LEGO has been exploring smart brick technology—imagine a standard 2×4 brick with sensors, speakers, and wireless charging built right in.

You’ve got your Arduino talking to one sensor and everything works great.

There’s a moment in every electronics hobbyist’s journey where blinking a single LED stops being impressive. You want something bigger.