pubudeux labs

  1. 555-Timer Oscillator for Ultra Low-Power Devices

    Using the Astable Multivibrator circuit with a CMOS 555 Timer, power consumption on battery-powered sensors can be drastically reduced to microamps. This guide demonstrates two common circuits that can be used to achieve this.…

  2. 10 Gigabit Networking for the Homelab: Beginner's Guide

    When I first started to get into building a homelab, I didn't realize 10 gigabit was something that was really reasonable to have in a home network. Understand the 10 Gigabit landscape, what equipment is out there, and what to look out for in order to get the most performance for your money.…

  3. MakerHawk USB 150W Load Tester - Review and Battery-Power Mod

    I ordered this MakerHawk USB load tester a few months ago. For the price it packs a punch, but comes up short on the accuracy of voltage readings. I modded it to run on a single 18650 Li-ion battery, making it a much more portable and easy to use tool.…

  4. Homemade Battery-Powered Alexa Smart Speaker

    Using a disassembled Echo Flex device, I made a portable, wireless smart speaker with an integrated phone charger. Aside from being a fun project, it is cool to have a powerful speaker that just integrates with the rest of my Alexa devices.…

  5. DIY Gigabit 802.3at PoE+ Splitter: Schematic and Build Guide

    Making a 802.3at Power over Ethernet (PoE+) splitter using through-hole components and a controller IC. Schematic and build guide - this is a great way to learn about how Power over Ethernet powered devices (PDs) work.…

  6. Read the Datasheet! How to use datasheets and select the right component for your circuit

    Guide to reading and understanding components (ICs, resistors, MOSFETs, capacitors) datasheets. There is a ton of information that you are missing if you don't dive into datasheets!…