ESP32
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This 18-Servo Hexapod Changes Its Walk Mid-Stride, With All the Leg Math on One ESP32-S3 Most hobby hexapods walk by playing back a fixed sequence of leg moves, which is why switching gaits usually means stopping first. The hexapod built by ForgeVolt does not stop. It blends from a fast tripod walk into a tetrapod or ripple gait while it is still moving, leans into curves, and keeps its body level when the floor tilts under it. All of the leg math runs on one ESP32-S3, and the… |
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Your Sonicare Brush Head Has an NFC Chip That Logs Brushing Time, and It Can Unlock a Mac A toothbrush head is a plastic stick with bristles, so why does Philips put a microchip in it? YouTuber Circuit Helper wanted to know, so he built a small NFC reader, read what a Sonicare brush head stores about the person using it, rewrote that data, and finally used an old brush head as a key to unlock his Mac. The chip sits under a small brown dot near the base of the head and needs no… |
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How to use ESP32 Deep Sleep Mode for Low Power Consumption We have built several ESP32 projects using different ESP32 development boards. But these boards come with a power-saving mode called deep-sleep mode. Let's try to understand deep sleep on the ESP32 with an example. Take an example of a laptop. When it's in use, the fans spin at high speed, the display is on, some apps run in the background, and the battery drains fast. But when we close the… |
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This 70 g Robot Butterfly Actually Flies, Flapping Two Servos From an ESP32-C3 Propellers make flying easy. Flapping wings do not. Maker Max Imagination still built ESP-FLUTTER, a 70 g remote-controlled butterfly that lifts off on its own wings, glows at night with LEDs along the wing edges, and can be flown from a phone browser. The firmware is open on GitHub, and the project was picked up by Hackster on 2 November. Two servos… |
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This Desk Buoy Copies the Live Motion of a Real Buoy at Sea, Hanging From 8 Stepper Lines A Belgian maritime pilot, whose job is guiding ships in and out of port, has built a desk piece that brings the sea indoors. His 30 cm 3D-printed west cardinal buoy hangs on eight lines, each wound by its own small stepper motor, and it rolls and heaves with live wave data from a real buoy out at sea. Pick a station off Bermuda and it moves to 1.9 m waves every 8 seconds; for some buoys it… |
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A Maker Saved Two Wind Gauges From a Demolished Airport Tower and Gave Them an ESP32 Brain When his local airport tore down its old control tower, one maker got the chance to salvage two vintage wind meters from the controllers' console: a wind speed dial (0-100 mph) and a wind direction dial (0-360 degrees), both heavy steel cans with glass faces and night lamps. Instead of putting them on a shelf, he made them show live wind again, fed from his own weather station and driven by a… |
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How to Build an ESP32 Offline Speech Recognition Speech recognition models like OpenAI’s Whisper offer high levels of accuracy, but their base model itself consumes up to 140MB and running them on a low-end device like an ESP32 is difficult. In this tutorial, we are going to run Cactus Compute’s Whistle Speech-to-Text Model launched on 2nd of October 2026. The actual size of the model is 16.9MB, which won't fit… |
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A $5 ESP32-P4 Chip Now Writes Down Everything You Say, Live and Offline, With About 4 Wrong Words in 100 Speech recognition on a microcontroller usually means a short list of fixed commands. Boumedine Billal has gone much further: his open-source project runs a full speech-to-text model live on an ESP32-P4, a chip that costs about $5. You talk into the board's microphone and any English sentence appears on its screen as you speak, with no Wi-Fi, no cloud and no neural accelerator. On the standard… |
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How to Run Wikipedia Offline on ESP32 These days, we are heavily dependent on cloud computing, high-speed internet and all. We rarely think about what happens if the internet goes down or what happens in areas where the network is not reachable or information access is very difficult. The main solution is having the data and its processing locally so that they are reachable anytime, even without internet… |
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A Son Built His Offline Dad an ESP32 E-Paper Frame That Shows Which Airliner Is Flying Over the Alps Right Now Daniel Zellhuber's father lives in the Bavarian mountains, loves watching planes cross the sky, and does not use the internet. So instead of showing him a flight-tracking app, Daniel built him a small flight tracker in a picture frame. Whenever an airliner passes overhead, the colour e-paper screen shows the airline with its logo, flight number, route, aircraft type, speed and altitude. There… |
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This DIY ESP32 Soundbox Announces Real UPI Payments in About 2 Seconds, No Merchant Account Needed Walk into almost any shop in India and you will hear it: a small speaker on the counter calling out "Rs 10 received" the moment a customer pays by UPI. Makers have built their own versions before, but almost all of them need a merchant account with a payment gateway, which most students and hobbyists simply don't have. Now techiesms has built an ESP32 payment soundbox that skips the merchant… |
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This DIY ESP32 Music Player Combines Bluetooth, MicroSD Storage, and a CNC-Machined Aluminum Body With a Brass Knob HVT Lab recently built a custom portable music player using an ESP32 microcontroller, combining local music playback, rotary encoder controls, and Bluetooth connectivity in a compact retro-inspired design. The project allows users to load their favorite songs onto a microSD card and play them through a 3.5 mm headphone jack. An OLED display provides a simple interface, while a rotary encoder… |
