HowTo: Blinking LEDs
Turn your Winamp beats into a TIP31-powered light show
Create a music-reactive LED display using TIP31 transistor and P2 audio connector. Sync 4 LEDs with Winamp audio output for a DIY sound-activated light show project.
I build useful software and the hardware behind it.
I'm Daniel, a software engineer and hardware hacker working across health data, travel tools, AI, DePIN, and robotics.
I co-founded Hotspotty and DePIN Hub, and I ship independent apps including DaysAbroad and VitalTrends. This is where I share the work and what I learn along the way.
Recent Posts
How to make a bike charger for your iPod
DIY bicycle-powered charging system for sustainable mobile power generation
Build your own bicycle-powered iPod charger using bike dynamo and electronics. Complete DIY tutorial for creating sustainable mobile charging while cycling with green energy.
Brazil moves towards fast internet connection
Brazil's progress in expanding high-speed internet infrastructure and connectivity
Explore Brazil's efforts to improve internet infrastructure and expand high-speed connectivity. Learn about broadband development and digital inclusion initiatives in Brazil.
WordPress 2.0
WordPress 2.0 release brings major improvements to the blogging platform
WordPress 2.0 released with significant improvements and new features. Learn about the major updates to the popular blogging platform and content management system.
External Winamp Control
Building a 4-button serial port controller for hands-free music control
Build a custom 4-button external controller for Winamp using serial port connection. Perfect for gaming sessions and hands-free music control with push-buttons and COM-port interface.
MouseMod Project
Adding LED lighting to an old mouse - early 2000s modding magic
Transform an old computer mouse with LED lighting modification. Complete tutorial with circuit diagrams, resistor calculations, and step-by-step assembly for beginners in PC modding.