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AutoCAD to EAGLE PCB Drawing Import - DIY AUDIO BLOG, AUDIO WORKSHOP. Drawing a PCB by exact dimensions using EAGLE PCB isn’t quite the easy thing. An easier approach would be to draw it in AutoCAD and then import. Importing is quite easy. This is how it goes. This is my simple pcb Now what you need is to save the drawing to DXF format by going to Save As and chose AutoCAD 2004 DXF form the Files of type drop down menu. Now you need to convert this file to something that EAGLE would understand – a script. Here is the app: Load the file and hit convert. Now you go to EAGLE PCB and select File -> Script. However you will need to place holes and drills.

It is wise to put some sort of a mark for the center of the holes when drawing the PCB in AutoCAD. After the import you need to zoom in to the center. You might need to zoom even further O.O : It is a tricky job but with some practice you will get used to it When you are finished aligning the holes you can delete the markers. 123D Circuits. PCB Printed Circuit Board File Creation Calculator | Advanced Circuits. Menu Home / Trace Width Website Calculator Trace Width Website Calculator Engineering/Technical Download BROCHURE Lorem ipsum Powered by QuikWeb Developer ©Advanced Circuits. 2015 All Rights Reserved.

Advanced Circuits has been the leading PCB quick turn manufacturer since 1989. Original text Contribute a better translation. Raspberry Pi B+ Power Protection Circuit | All Things Electronics. I just bought the newly relased Raspberry Pi (RPI) model B+. In comparing the schematic with the older model B, I noticed they have updated the power protection circuit. The circuit functionality is mostly obvious. There is polyswitch F1, a self-resetting fuse which protects the RPI from overcurrent condition. There is the Transient Voltage Suppressor (TVS) diode D5 which protects the RPI against static discharge and possibly overvoltage condition.

“RPI B+ Power Protection Circuit” “Reverse polarity protection with mosfet” I wasn’t able to work out the PNP pair functionality by searching the Internet. It turns out that the matched PNP transistors are used as voltage comparator. This diode functionality is important because when the RPI is connected to a computer USB port, the RPI must never source current upstream into VBus.

The way the circuit works is this: if Vin=Vout, lets say 5.0V, the PNP transistors are biased in a current mirror configuration. Électronique DigiKey | Distributeur de Composants Électroniques | Page d'accueil France. Adding an On/Off switch to your Raspberry Pi - 楼里打扫. As most of you know by now, the Raspberry Pi is a fantastic little Linux box with many wonderful features. Over the last year and a bit that the Raspberry Pi has been out in the wild, users have discovered that this little computer can do almost anything – and without crippling your wallet! However, Raspberry Pi's very small price tag and form factor mean that the Rasp Pi has had to do without some of the home comforts normally found on a laptop or desktop computer – one of these comforts is a power-on and -off switch. The only safe way to shut down the Raspberry Pi is to do it manually using the graphical desktop interface – either with the LXDE power management window or by opening a terminal window and typing in a shutdown or reset command.

Although an orderly shutdown is not a huge amount of work, it often gets overlooked or forgotten, and some users just pull out the microUSB power plug while the system is running. Reset Switch Parts and Tools for Reset Switch Safe Shutdown Switch. Dirt Cheap Dirty Boards. Design Your Own PCB Business Card. 12 : Allumer des prises à distance. Ce post est le douzième d’une liste de tutoriels sur le raspberry PI, cliquez ici pour accéder au sommaire ! Avant que la fin du monde (un peu tardive), ou une trop grosse cuite du nouvel an ne nous sépare, je tenais à vous offrir ce petit tuto sur le “télécommandage” (ça se dit ça?)

De prises électriques depuis le raspberry PI. Nous allons donc reproduire notre tuto 7 “éteindre/allumer une lampe avec le raspberry PI” mais cette fois ci, sans utiliser de fils. Démonstration Voila la traditionnelle petite vidéo de démonstration de ce que nous allons faire : (Un grand merci à Maxime Raynal (dont on peux reconnaître le petit accent chantant dans la vidéo pour son fabuleux montage , ça change de mes précédentes vidéos filmées à la Blairwitch) Quelques screenshots de l’application web évoquée dans la vidéo : Accueil des périphériques, par pièces Espace de configuration sans utilisation de base de données Interface adaptables tablettes/smartphone Points forts / Points faibles Le matériel requis Le code.

15 : Créer sa propre prise radio (et autres périphériques) pour 6€ Ce post est le quinzième d’une liste de tutoriels sur le raspberry PI, cliquez ici pour accéder au sommaire ! Suite à nos précédents tutos sur le Raspberry PI et la domotique contrôlée par radio (et notamment le tuto 12), certains d’entre vous m’ont demandé si il n’était pas possible de se passer de prises Chacon, d’autres m’ont demandé si des multiprises existaient sur le même principe, quant à moi je souhaitais de débarrasser de Chacon pour diverses raisons : Je voudrais, sur le long terme, personnaliser le protocole radio (inclure une notion d’état de la prise, en retour de consommation d’énergie etc..)J’aimerais construire de A à Z mon système domotique dans une optique pédagogique (100% DIY)J’aimerais ajouter quelques gadgets dans ma prise (pourquoi pas un capteur de température ou de consommation de courant ?

:D) C’est pourquoi nous allons aujourd’hui construire notre propre prototype de prise radio (pouvant facilement être transformée en multiprise) commandée par le Raspberry PI. ANSI PCB Track Width Calculator. This is the NEW version of my calculator. The original version is HERE. New features in this version include: use of metric or imperial units for all major fields the ability to change units for any applicable field on the fly minor enhancements to some of the calculations - IPC-2221(A) changes the curve fit saving of all parameters in a cookie to keep your preferences between visits This page calculates approximations to the ANSI / IPC-2221/IPC-2221A design standards for PCB trace width - this is the replacement for IPC-D-275.

The approximations and rationale are described in Temperature Rise in PCB Traces, equations 13 & 15. by Douglas Brooks, UltraCAD Design, Inc. The original idea for this approach was from Brad Suppanz. The figures returned by this calculator are to be taken as a guide only. The trace width formulas are: Internal traces : I = 0.024 x dT0.44 x A0.725 External traces: I = 0.048 x dT0.44 x A0.725 where: I've added a recommended track clearance value based on the UL rule: External PCB Trace Width | Electronics and Electrical Engineering Tools | EEWeb Community. Calculate the required trace width for a specified current Inputs Trace Width Unit Trace Thickness Temperature Rise Trise Additional Inputs Ambient Temperature Tamb Length Output Additional Output Trace Temperature: Resistance: 0.0000436 ohms Voltage Drop: 0.000436 volts Power Dissipation: 0.00436 watts Tool Description Trace width is a requirement that designers specify to ensure that the trace can handle the required current capacity.

Max Current Trace Thickness Max Desired Temperature Rise This tool also calculates the following additional valuable information related to the trace: Resistance Votlage Drop Trace Power Dissipation After a user specifies the max current, trace thickness, and desired max temperature rise, the tool calculates the trace width. Electronic Parts Online Store - Tayda Electronics. DealeXtreme - Cool Gadgets at the Right Price - DX Free Shipping Worldwide. CircuitBee. Dangerous Prototypes | A new open source hardware project every month. The Adafruit Eagle Library. What be in the Adafruit Eagle library hells yes its my very own mixtape of package footprints. Dont forget you can also grab parts out of any adafruit project's .brd file by running exp-project-lbr.ulp . However, since its nice to be tidy, I'll be merging everything into ONE FILE called the Ye Olde Adafruit Eagle Librarie, available at github Please note, this library is under serious construction, it'll be updated constantly with old parts files that must be copied in & cleaned up!

You can almost certainly 'subscribe' to the project at github , I just dont know how. The license Most of 'em are either Eagle parts that I've changed a little to make them easier to solder, some are 'handmade' and a few are from microbuilder.eu Its released into the Public Domain - that means you can do whatever you want. Enjoy! Whats innit? A plethora of tasty parts such as…. Mechanical 1x2 - a 2 pin 3.5mm header for a 2 pin terminal block FIDUCIAL - you know, a fiducial! Batteries Classic libs Crystals & such. LED calculator for single LEDs. LittleBits Hue Lighting Controller. Animated GIF showing me using the LittleBits Hue Controller to cycle the brightness and color of my lights In case it wasn’t clear from my recent cameo on some RadioShack fliers, I’ve been having a bunch of fun with LittleBits‘, more sophisticated modules recently.

A few months ago, I posted a project showing how to use the CloudBit to connect your umbrella stand to the internet. This latest project leverages the LittleBits Arduino Bit, a small linux computer (like a BeagleBone, Raspberry Pi, or UDOO), and the Philips Hue Hub to easily control the state, brightness, and color of your Hue lightbulbs via a tactile interface. Here’s a quick video showing this project in action: This project is open source hardware and software. The system architecture of the LittleBits Hue Lighting Controller is pretty simple, but I put a lot of thought into making the system robust, fast, and easy-to-setup. Here’s a diagram that explains how the system is setup: Ready to make one for yourself? How to Design the Perfect PCB - Part 2 - Michael LeonardMichael Leonard. This post continues from “How to Design the Perfect PCB – Part 1.”

In part one we covered how to finish the pre-layout work like setting goals, visualizing your design, and selecting parts. In this post we focus more on the physical side of PCB design and discuss the caveats that may trip you up. The featured image for this post is the Manga Screen designed by Elias Bakken, you can learn more about it and explore his work at Hipstercircuits. Before we get started, I think it is worth saying that this is NOT a guide on how to use any specific CAD software. This article is meant to serve as a general guideline on how you can design the best possible PCB regardless of your experience level. When I set out to design my first PCB I was told “Well, it’s your first PCB so it probably won’t work anyways, but that sounds interesting.”

Putting the Design into Software Now that you have an idea of how you want the project to turn out, it’s time to start moving the design onto your computer Other Tips. Controlling Motors. Ver: nov-07 (Note: images are intentionally grainy to reduce load time) There are many ways to implement on-off control of small DC motors using a BASIC Stamp. Each method requires construction of an interface circuit. The motor can be controlled by a switch....but this is of little use for Stampers The most common way to control a motor is through a transistor.

The TIP120 is an NPN darlington transistor. You can have several motors powered with one battery or each with it's own battery. One transistor can control several motors, but check for overheating. MOSFET power transistors are an excellent alternative to using bipolar power transistors. Relay control For high current motors, try using a relay. Some relays have coils which can be controlled directly from the Stamp. Bi-directional motor control With a double-pole, double-throw (DPDT) relay and two transistors, you can make your motor turn in either direction. Noise spikes Slowing the motor. Transistor: Simple Switch with Raspberry Pi GPIO - TacticalCode EN. Today, I’ll show you a small tutorial on how you can use a Raspberry Pi, a transistor and some wire to replace a PC’s on/off button. This way, it could be possible to start devices over a network, although they aren’t wake-on-lan capable. In general, this method can be used everywhere a circuit is to be closed.

For voltages above 5V however, You should use a relais to do the job. Also, my Twitter-Followers can calm down: No, this wasn’t a doomsday device ;) For the time being, I don’t have much component parts to play with, so I can only do articles on rather simple circuits. Nevertheless, I find it quite astonishing what You can do with a RasPi, some wire, a transistor and some spare time. In my experimental circuit, I used the following components: Mainboard, PSU, Fan, On/Off button from a PC-Case, IDE-Cable, BC327-16 bipolar transistor, Soldering Iron, Solder, insulating tape and – of course – the Raspberry Pi. BC327 – Left: Collector, Middle: Base, Right: Emitter. Linux e hacking: Recharging and reusing Acer laptop batteries on DIY projects with arduino. It's not unusual to end up with dead laptops whose battery is still useable for some other projects, the most usual practice, is to dismantle them to recover 18650 cells, but then you will have some prolems with integrating them on your project, the first one is avoiding stuff to catch fire or blow up and the second one is that you have no way to reliably tell how much % of charge is left on these batteries, and their real capacity ( capacity decreases with time and usage ).

These batteries in most cases are connected to an I2C/SMBus of the laptop and they use the Smart Battery protocol, which is a standard of most advanced battery powered systems, especially laptops. The hardest part normally is to find the pinout of these batteries, but since Acer easily leaks complete motherboard schematics, it has not been hard to find these pinouts. Charging the battery and using it There's the pin 3 that has to be connected to ground with a 1KOhm resistor to enable the battery. #define SDA_PIN 3 else to. 18650 Things To Do With An Old Laptop Battery | GeekDad.

If you’ve owned a laptop for a few years, you’ve no doubt encountered the problem that the battery eventually loses its ability to hold a charge. Generally what happens is that one or more of the cells inside the battery pack degrades to the point that it cannot be recharged, and the entire pack loses its effectiveness. At this point, your choices are to buy a new replacement pack, or put on your hardware hacking hat and safety glasses, and start taking things apart. Now, before you start tearing things apart, note that the lithium cells in a laptop battery can contain a lot of power, and you can hurt yourself or set things on fire if you’re not careful.

Sound scary? It should! And if so, then perhaps you should content yourself with just reading through this posting, rather than messing around with things yourself. As you can see in the image on the right above, a laptop battery pack consists of a number of individual cylindrical cells. LM R25 VGA LCD Controller Board DIY A Laptop—A Desktop Monitor Reuse Repair LED.

iMac G3 revival - MacRumors Forums. Un (non)blog pour les (non)geeks, low-tech warriors et autre bricoleurs avertis - Artisan Numérique. Raspberry Pi GPIO: Driving a Relay using a Transistor. The Raspberry Pi Hobbyist: GPIO Output Relay Interface. All About Circuits : Free Electric Circuits & Electronics Textbooks. iFalls: iMac G3 Modding con Atom 330 e OSX + Ubuntu | www.danieleverducci.it.