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Building a lab power supply from old computer power bricks:
Over the years, I have accumulated many used computer power bricks. Although I could just use them by themselves to power other electronics with similar voltage and current requirements, I thought I would combine a few of them together as the input to a linear regulator so that I can make a powerful lab power supply.
See the full post on Kerry Wong’s blog.
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Utsav shared detailed instructions of how to build your own current sensor that can measure up to 15 Amps, project instructables here:
This current sensor can easily be used for measuring currents up to 15 Amps constant and can even handle about 20 Amps peak. I had previously built a shunt current measurement module using a home made shunt but it had a few limitations- The wire was quite long which may not be suitable for small devices. It also got rusted over time and one major drawback was heating at higher currents even at 10 amperes. Well, this module solves almost all of these problems in a more efficient design.
Check out the video after the break.
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Dejan over at HowToMechatronics shared detailed instructions on how to build your own air quality monitor:
Have you ever wondered about the quality of the air you are breathing, or maybe, why you sometimes feel sleepy in the office or tired in the morning even after sleeping all night? Poor air quality can lead to many negative health effects as well as can cause tiredness, headaches, loss of concentration, increased heart rate and so on. Monitoring the quality of the air may actually be more important than you realize. So, in this tutorial we will learn how to build our own Air Quality Monitor which is capable of measuring PM2.5, CO2, VOC, Ozone, as well as temperature and humidity.
See full details at howtomechatronics.com.
Check out the video after the break.
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Layne designed a laser-cut project plate:
When I build electronics prototypes, it’s sometimes difficult to keep all the parts together without falling apart, especially if you need to move everything from one location to another. Between the breadboards, Arduino boards, programmers, FTDI cables, spare wires, and spare parts, I wanted to create a way to keep them all connected together without falling apart or losing anything. To this end, I designed a laser-cut Project Plate. It has holes for mounting an Arduino or Arduino Mega, a place for sticking a double-breadboard, and a series of customizable short boxes for holding parts.
See the full post on Wayne and Layne blog.
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Erich created a DIY high density Hue smart LED stripe:
Philips Hue Smart LED stripes are great, but they have a disadvantage: the LED density is rather low: one LED cluster (WW, RGB, CW) every 55 mm. This leads to the problem that individual dots might be visible if the LED stripe is directly visible. Even if the LED stripe is used for indirect ambient light it means that individual dots might still be visible on the wall or ceiling. The solution is to create a ‘high density’ Hue smart LED stripe
More details on MCU on Eclipse blog.
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DIY tutorial on building your own universal PID temperature controller @ breadandammo.com.