Teardown of an Array 3711A 300W DC Electronic Load

I have made many electronic loads in the past. For instance this simple harddrive cooler housed small dummy load, this more sophisticated constant current/constant programmable load and this heavy-duty electronic load that is capable of sinking over 1kW under peak load. In this blog post though, I am going to take a look inside an Array 3711A DC electronic load I recently purchased on eBay. You can find a v ...

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Distrelec adds the new Sony Spresense range to webshop

Distrelec Ltd, leading European distributor of electronics, automation and measurement technology has added the new Spresense range by Sony, manufacturer of consumer and professional electronics, to the webshop. The Spresense is a compact development board based on Sony’s power-efficient multicore microcontroller CXD5602. Featuring an integrated GPS, high-res audio output and multi mic inputs, the board is ...

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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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SparkFun: A look inside some common power supplies

Introduction Power supplies are everywhere these days. With the advent of switching power supplies, the cost of high-current supplies has radically dropped. Maybe you’ve noticed how the large, heavy, wall-wart style adapters are no longer lurking around your baseboards, falling out of their sockets? Or occupying several of your valuable power-strip positions? But not all power supplies are created equal. Wh ...

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PINE A64, First $15 64-Bit Single Board Super Computer

Update 12/14/15 (We're putting it here so it's easier to read) : To help minimize the flooding of our inbox so we can get everyone back to all the questions and concerns... please read our FAQs at the bottom of the page. Most commonly asked is buying more than 1 board and save on shipping. Please just pledge 1 and you can add additional boards after the campaign i over, along with any upgrades accessories y ...

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Build a Wireless Water Meter for Your Home

California, where I once lived, is in the midst of a severe drought. Thankfully, I now reside in North Carolina, a much wetter state. But even here there have been years when water was in short supply and people were asked to conserve. Most folks are happy to comply with such requests. But that’s not easy to do when information about your usage comes only once a month on your water bill. You could, of cours ...

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Building a SmartWatch

I have an issue with smart-watches. Watches in general fall into one of two categories: a tool to tell the time, or a fashion statement. Increasingly, I believe the latter category is larger than the first. With the advent of the iWatch, Pebble and the like, fashion and making a statement has moved into technology. It's not quite a new thing but nevertheless, it's something I'm not too fond of. My solution? ...

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Making the new silicon: Gallium nitride electronics could drastically cut energy usage

In 2013, the Department of Energy (DOE) dedicated approximately half of a $140 million research institute for power electronics to GaN research, citing its potential to reduce worldwide energy consumption. Now MIT spinout Cambridge Electronics Inc. (CEI) has announced a line of GaN transistors and power electronic circuits that promise to cut energy usage in data centers, electric cars, and consumer devices ...

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Jameco Electronics Hobbyist Study: Electronics Skills Are Critical to Fueling American Economy

BELMONT, Calif.--(BUSINESS WIRE)--A comprehensive study of electronics hobbyists released today found that over 68% of hobbyists believe electronics as a hobby is essential to fueling the American economy. Over 1700 electronics hobbyists participated in the study, the Great American Electronics Hobbyist Census, conducted by electronic component distributor, Jameco Electronics. In 2014, electronic component ...

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PixelatedPIC

ESP8266 + DS18B20 Temperature sensor sends data to Thingspeak.com Its been a while i was searching for a cheap wifi module and with the help of smart-prototyping.com, i was able to get a module almost less than USD 5. To connect the module to breadboard for prototyping, i made a small jig to interconnect with the board easily. So i can wire up the device and interface anything to GPIO's. Be careful with the ...

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RFduino Compass

The RFduino compass is a fully functional stand-alone compass which also transmits the current heading via Bluetooth low energy technology to phones, tablets, personal computers or any other equipped device. The RFduino compass is known as a Bluetooth Smart device. While other combinations of materials may be used, the ones used for this project and shown here are: RFD22102 RFduino DIP BLE & ARM CPU RFD ...

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ESP8266 ESP-03 Dev Board

This is a small dev board I designed to make experimenting with and deploying the ESP8266 ESP-03 modules a bit easier. As well as breaking out all the pins to 2.54mm headers it has a position to fit either a DS18B20 temperature sensor or a DHT22 temperature/humidity sensor plus the required pull up resistor. It can be powered from 3.3V or 5V+* if the regulator is fitted and there is a footprint for a micro ...

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