@circuitrocks

circuitrocks

@circuitrocksManila, PhilippinesJoined May 2026

distributor of arduino, adafruit, raspbery pi

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⚡ Distributor of Open-Source Hardware 📍 Since 2015 | Metro Manila, PH 🔧 Empowering makers, students & innovators

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Circuitrocks Blogscircuitrocks.hashnode.dev228 posts

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Ccircuitrockscircuitrocks.hashnode.dev5h ago · 3 min read

Build a Raspberry Pi Flight Tracker That Replays Your Whole Sky

What you need before you start A working flight tracker takes three parts: a Raspberry Pi with USB and networking, a receiver dongle tuned to 1090MHz, and an antenna mounted as high as you can reasona

Ccircuitrockscircuitrocks.hashnode.dev18h ago · 3 min read

Arduboy's $39 CHGame Rev0: A RISC-V Handheld Built for Hacking

What does a game console look like when the design goal is "as cheap as physically possible"?Arduboy's answer is the CHGame Rev0, a \(39 development kit that ships as a bare PCB with a color screen bo

Ccircuitrockscircuitrocks.hashnode.dev23h ago · 3 min read

Build a Palm-Vein Biometric Door Lock with an ESP32 and IR Camera

Clear a weekend and a bench, and here is the shopping list: an ESP32-WROOM-32E, a DFRobot dual-camera palm-vein module, a 5V relay board, a 12V solenoid lock, a 0.96-inch I2C OLED, and a separate barr

Ccircuitrockscircuitrocks.hashnode.dev1d ago · 3 min read

ATtiny816 PCB Business Card Runs 21 LEDs on Harvested NFC Power

Battery-free is not the same thing as unpowered. A card you can tap against a phone and watch light up, with no cell to die and no port to charge, runs on energy the phone's own NFC field is already r

Ccircuitrockscircuitrocks.hashnode.dev1d ago · 3 min read

An ATmega Robot Arm That Serves Badminton Shuttlecocks

What you'd need on the bench A shuttlecock server breaks down into three subsystems you can price out separately: a feeder that isolates one shuttle at a time, a pair of counter-rotating wheels that g