How To Select a Capacitor

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Sanket Gupta @ blog.octopart.com has written a capacitor select guide. The article goes through aluminum electrolytic capacitors, ceramic capacitors, Tantalum Capacitors, mica capacitors, film capacitors and Polymer Capacitors.

In this blog, we will explain all the different types of capacitors, their merits and demerits, and popular applications. We have included some recommendations for commonly used capacitor series with high supply chain availability from Common Parts Library and Seeed Studio’s Open Parts Library

How To Select a Capacitor – [Link]

Programming an ATtiny with Arduino board

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This detailed tutorial shows how to program an ATtiny45, ATtiny85, ATtiny44 or ATtiny84 microcontroller using the Arduino software.

The ATtiny45 or 85 is a great option for running simple Arduino programs: it’s small, cheap and relatively easy to use. It does, however, have some limitations relative to the ATmega328P on an Arduino Uno. There are fewer pins, meaning you can’t connect as many components.

Programming an ATtiny with Arduino board – [Link]

ATtiny85 Game Console

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webboggles.com has designed a SSD1306 OLED Screen based game kit using an ATtiny85 microcontroller. They also sell it as a kit to assemble it yourself.

The new snap case has been updated to allow enough height for the screen header as well as a factory made CR2032 battery holder.
The buttons have been concealed to prevent spontaneous button presses inside bags and pockets.

ATtiny85 Game Console – [Link]

HTML5 Circuit Simulator

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Iain Sharp build this port of online Circuit Simulator based on Paul Falstad’s simulator, however Sharp’s version is built using HTML5 and requires no plugin to run. Think of it like animated Fritzing circuits, with a slew of pre-built circuits and components available for tinkering with.

HTML5 Circuit Simulator – [Link]

ATTiny85 board A First Look and review

educ8s.tv wanted to take a look at this tiny board for a long time. It is very small size, it is low cost and it uses a different processor than the Arduino boards. It uses the ATTiny 85 microcontroller chip, which can operate at a frequency up to 20Mhz. It has 8Kb of flash memory, 512bytes of RAM memory and 6 I/O pins 2 of which can implement the I2C protocol. It is very small in size and has low power requirements. We can program it using the Arduino IDE, which makes things so much easier! I got this tiny board with a USB interface in order to be easier to program. You can find a link for this ATtiny85 board in the description of the video.

educ8s.tv wanted to test if the ATtiny85 board is a good option for simple projects and if we achieve longer battery life with this board that a standard Arduino mini. Let’s find out together.

ATTiny85 board A First Look and review – [Link]

How to Control a Reflow Oven with Raspberry Pi

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Here is a great Raspberry Pi based Reflow oven controller from “apollo-ng” on GitHub. You can edit your temperature curve on your browser and Rasberry Pi controls the solid state relays and fan.

Turns a Raspberry Pi into a cheap, universal & web-enabled Reflow Oven Controller. Of course, since it is basically just a robot sensing temperature and controlling environmental agitators (heating/cooling) you can use it as inspiration / basis when you’re in need of a PID based temperature controller for your project. Don’t forget to share and drop a link, when you do.

How to Control a Reflow Oven with Raspberry Pi – [Link]

Electricity Frequency Meter

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This project is about an accurate mains frequency meter that has a bar-graph displaying the relative deviation from nominal frequency. It can work with 50Hz and 60Hz systems.

An article by Dieter Laues in the February 2012 issue of Elektor inspired me to get my soldering iron out. The article described how by measuring the frequency of the mains electricity supply in any socket, the relative load across the entire electricity network could be determined

Electricity Frequency Meter – [Link]

Arduino Remote Control Tutorial

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Øyvind Nydal Dahl show us how to use an IR remote control with Arduino. For this purpose he connects a TSOP312 and an IR LED to Arduino and goes in detail on the sketches.

In this tutorial I am going to show you exactly how to make an Arduino remote control. You can use this project to combine functions from different remote controls and make your super-awesome dream remote control!

Arduino Remote Control Tutorial – [Link]

BeagleBone Logic Analyzer

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Make your own logic analyzer using BeagleBone board.

Software is where the magic happens. There is a pre-made image for the BeagleBone with everything loaded and configured to use the BeagleLogic. It’s a recent image based on Debian instead of the older Armstrong builds. The nice thing is that it doesn’t flash the eMMC so you can leave your existing setup alone and just pop in the SD card when you need your logic analyzer. Which is another reason that makes it a good option. I can still use the BeagleBone hardware for other projects and not keep it collecting dust in between uses.

BeagleBone Logic Analyzer – [Link]