Catalog of 150 open-spec, community-backed Linux SBCs under $200. Our 2021 catalog of 150 open-spec, maker-oriented SBCs that run Linux or Android provides updated prices and descriptions plus a comparison spreadsheet of major features.
The following summaries of 150 community-backed and predominantly open-spec Linux/Android hacker boards under $200 are listed in alpha order. They list specs and lowest available pricing recorded in the last two weeks of December 2020 with products either shipping or available for pre-order with expected ship date by 2Q 2021. Please also check out our introduction article covering the latest community-backed SBC trends (see link below). Alphabetical index: Low-power Arm hacker board classic keeps it fresh with add-onsCompany/project — OlimexProduct pageProcessor — Allwinner A20 (2x Cortex-A7 @ 1GHz); Mali-400 GPUMemory — 1GB DDR3 RAM; opt. 8GB eMMC, 8GB NAND, and 16GB eMMCPrice — $49 (40 Euros); 48 to 60 Euros ($73) for ext. flash versions.
Learn Bil Herd’s DIY Surface Mount Assembly Process. You can do your own Surface Mount Technology based PCB assembly with just a handful of tools and some patience.
At the heart of my SMT process is stopping to inspect the various steps all while trying to maintain a bit of cleanliness in the process. Surface mount or Surface Mount Technology (SMT) is the modern way to assemble Printed Circuit Boards (PCB) and is what is commonly seen when opening a modern piece of tech. It’s much smaller than the older Through-Hole (TH) technology where the component leads were inserted into holes in PCB, and act we called “stuffing” since we had to stuff the components into the holes.
A few specialized tools make this a lot easier, but resourceful hackers will be able to pull together a solder paste stencil jig, vacuum tweezers, and a modified toaster oven with a controller that can follow the reflow profile of the solder paste. Where you shouldn’t skimp is on the quality, age, and storage of the solder paste itself. Component Size Matters Final Inspection. Mike's Electric Stuff.
DTMF. Fiber optics. Ethernet. Periodicals. PC parts. Capacitors. Inductors. Tutorials. Zener Diode Circuits and Applications. - a summary or tutorial covering the essentials of the Zener diode or voltage reference diode used in many power supply and other circuits.
Zener diodes are used in many circuits in a variety of ways. The most common Zener diode circuit is one in which the Zener diode is used as a voltage reference element. This type of circuit uses the constant voltage as a reference in one of a variety of forms of power supply circuit. There are other Zener diode circuits and applications. They can be used to limit voltages, preventing surges from damaging electronics circuits. Simple Zener diode ciruit for voltage regulator When used in a regulator cirrcuit, the Zener diode must have the current entering it limited.
In a practical circuit, the simplest form of current source is a resistor. Simple circuit of a Zener diode shunt regulator The value of the series resistor is simple to calculate. NE567. LM567 Tone Decoder Calculator. Hardware. Electronics Forum (Circuits, Projects and Microcontrollers)
General Electronics. Test equip. Micro controller stuff. Lessons In Electric Circuits. A free series of textbooks on the subjects of electricity and electronics Copyright (C) 2000-2015, Tony R. Kuphaldt These books and all related files are published under the terms and conditions of the Design Science License. These terms and conditions allow for free copying, distribution, and/or modification of this document by the general public.
A copy of the Design Science License is included at the end of each book volume. As an open and collaboratively developed text, this book is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. Access individual volumes, I through VI: Edition numbers reflect major structural changes to a book volume such as the addition of new chapters, the substantial expansion of existing chapters, or a change in markup language (source code formatting). "Last revised" dates reflect non-trivial changes only. Note to instructors: <--- Click Here! Electronics.