DIY PCB inspection microscope

Despite how good microscope you have, stand is still very important part of final assembly. And while there are many commercial ones made of cast iron, they might cost more than a microscope head itself. I decided to make stand from wildly available material laying around – it’s MDF (Medium Density Fiberboard). Advantages – stable over time if not exposed to water, dirt cheap, easy to process. Overview In g ...

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Arduino 1,500m wireless remote control

Arduino enthusiasts, hobbyists and makers looking to control their projects from afar. May be interested in a new customisable wireless remote control designed by Schindler Technologies for the Arduino platform. Launched via Kickstarter this week the project allows you to easily control your projects such as a drone, remote control car, speakers or anything else your imagination can build. The customisable ...

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Thermal design: Get the heat out of the electronics

If you have high-powered LEDS, or a power supply, or are trying to control larger motors, you have to get a lot of heat out of your circuit boards. The classic way to dissipate heat is to bolt your power transistor to an aluminum heat sink. That is a slow, messy, and expensive proposition, especially if you need thermal grease between the transistor and heat sink (Figure 1). Another problem with bolted-up h ...

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Dev board can connect to any equivalent Arduino MCU controller boards

Analog Devices EVAL-M355-ARDZ-INT Development Board is designed for fast and simple connection to ADuCM355-based sensor boards. The board can also connect to any equivalent Arduino MCU controller boards. This provides for testing functionality, and performance of the circuit using a controlled evaluation environment. The board takes customised connectors to the sensor surfboards and provides up to four chan ...

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The SilentSwitcher, A Quiet Mains-free Power Supply

Audio projects become smaller over time with the rapid advancement of technology. A traditional power supply is still considered large compared to audio projects size constraints and it may not fit such delicate applications that need to deliver a good sound with zero noise. Jan Didden, audio specialist who is known for his own publications Linear Audio, has came up with a new idea that can help in perfecti ...

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“The Note is Right” Pitch Tuning Game

The objective of this project is to provide a multiplayer “pitch tuning” game in which the computer can determine the frequency of players’ input notes. [gallery columns="2" size="medium" ids="31217,31218"] The system guides two users through various states in which they are each given the chance to match a tone randomly selected by the computer. Players select their tone by using a dial which controls the ...

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iBreathe, A Breathalyzer Based on Hexiwear

Knowing the amount of alcohol you drunk is becoming easier using the iBreathe Breathalyzer project by Dave Clarke. You just have to blow in the alcohol sensor, then it pings the result to a smartphone app and to the cloud to document it as a table so you can see alcohol intake through time. This breathalyzer with a custom Beer mug casing will let you know where do you stand on the scale form “Sober as a jud ...

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433MHz wireless module configuration

Description HC-12 are cheap 433MHz wireless serial port communication modules with a range up to 1800m in open space. Each costs about $5 when bought from China, and 2 of them can create wireless UART link that can be used, for example, to transfer telemetry data from UAV. Or drive IoT device. Or connect sensors. Or whatever else one can think of. It is based on SI4463 RF chip, has build in microcontroller, ...

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CONTROL ANYTHING WITH A CHAT BOT

In the world of Internet of Things, it’s easy enough to get something connected to the Internet. But what should you use to communicate with and control it? There are many standards and tools available, but the best choice is always to use the tools you have on hand. [Victor] found himself in this situation, and found that the best way to control an Internet-connected car was to use the Flask server he alre ...

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LIGHTING UP A VERY WIRY CANDLE

Entries into the Circuit Sculpture Contest tend to be pretty minimalist by nature, and this LED candle by [Amal Mathew] is a perfect example. The idea here was to recreate the slim and uncomplicated nature of a real candle but with a digital twist, and we think he’s pulled it off nicely with a bare minimum part count and exaggerated wire length that gives it the look of a thin pillar candle. To give the LED ...

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Digital Multimeter

The purpose of this project was to design a functioning digital meter to measure voltage, current, and resistance to a known accuracy. The project involved the integration of hardware and software to take an input measurement signal from a pair of high and low leads that was then displayed on an LCD per the rotary selection switch (similar to the operation of most commercial digital multimeters).   Dig ...

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Introducing the BMP180 barometric sensor

This post is about how to use the BMP180 barometric sensor with the Arduino. It is also applicable for other similar barometric sensors. Introducing the BMP180 barometric sensor The BMP180 barometric sensor (model GY-68) is the one in  the following figure (front and back view). It is a very small module with 1mm x 1.1mm (0.039in x 0.043in). It measures the absolute pressure of the air around it. It has a m ...

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