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Robotic fish made of PVC pipes
Eric Dirgahayu’s robotic fish is made of PVC pipe and waterproof servos that are controlled by an Arduino board. Her future plans are to include sensors to measure the quality of water and a few other...
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Arduino distance meter
HC-SR04 is a very popular ultrasonic sensor for short distance measurements in DIY projects. This Instructable describes how to use it with an Arduino board to build an inexpensive distance meter with...
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ESP8266 temperature and humidity logger with deep sleep enabled
ESP8266 has made it possible for hobbyists and makers to develop IoT applications in simple and inexpensive ways. This article shows an example of making a very simple temperature and humidity logger...
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ATTiny-based computer with the simplest interface
Designed by Jack Eisenmann, the DUO Binary is an ATTiny84-based computer with a single button for input and a single LED for output. DUO Binary computer Video demonstration of DUO Binary is posted...
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DIY Buck-Boost converter
A buck-boost (also known as step-down and step-up) converter is a type of DC-to-DC converter that combines the principles of the buck and boost switched mode power supplies in a single circuit. What...
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HID IR Keyboard using PIC18F25J50
A PIC18F25J50 based USB HID IR keyboard from Suraj Bhawal uses a TSOP IR decoder IC to receive IR signals from an IR remote and convert them to HID inputs. HID IR Keyboard For this project, I used a...
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Open source glucose meter shield
M. Bindhammer won an award for the Assistive Technologies category of the 2016 Hackaday Prize contest for designing an open source Arduino shield that can measure blood glucose level using...
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Pallete: An open source tongue computer interface.
Designed by Dan Levine, Pallete is a fully open-source wireless computer interface to allow the mobility impaired to control computers, Android tablets and phones using the tongue. It uses infrared...
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Smart stick for visually impaired
This project article from 4D Systems describes how to build a smart stick that uses sonar to guide visually impaired. It uses 4Duino, which is an Arduino compatible computer board with built in 240×320...
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Easy Pulse mikro is now available on Tindie
Easy Pulse mikro, a DIY pulse sensor with a mikroBus form factor, is now available at our Tindie Store. a new addition to our Easy Pulse Sensor series. Its mikroBus form factor enables easy integration...
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16×32 RGB panel + Arduino Shield are now also available at Elecrow
Our Chinese partner, Elecrow, now also carries our 16×32 RGB LED matrix panel + Arduino driver shield. They also offer worldwide shipping at much lower costs. The RGB matrix panel has 512 bright RGB...
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Universal motor driver for PIC16F MCUs
This application note from Microchip presents the design of an open-loop speed control TRIAC-driven universal motor driver board. An interesting thing about this design is it uses Core Independent...
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CastMinder detects complications in orthopedic casts/splints
Alex Wulff’s CastMinder is a Bluetooth-enabled sensor system designed to predict complications in orthopedic casts and splints. It is capable to detect conditions associated with the onset of...
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Filter optimization for A/D conversion
Filters are necessary to eliminate unwanted noise or distortion in a signal prior to any A/D conversion process. Designing a filter to pass the desired frequencies is easy, but it introduces signal...
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Nocturnal hypoglycaemia detector
Hypoglycaemia is a condition characterized by an abnormally low level of glucose in blood. It is associated with diabetes, and is likely to occur if someone with diabetes takes too much insulin, eats...
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Measuring dielectric constant
Dielectrics are insulators that are used to separate the charged plates in capacitors. The insertion of the dielectric material enhances the charge storing capacity, and hence the capacitance, of the...
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Display traffic status on a wall clock
Navigation apps are handy these days to get live traffic updates and minimize the wait time on road. This Arduino based traffic status display clock does the same thing but in a cool way, using...
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PCB assembly at Elecrow
I have been asked a few times about where I make all of my PCBs and boards. So I thought I should share that experience here, which is what this blog post is about. In past 5 years, I have used PCB...
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Tiva C GPIOs
GPIOs are the basic interfaces of any microcontroller. Without GPIOs we won’t have any other way to use a micro and it will be nothing more different than a chunk of well-fabricated silicon. Through...
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Incubator bodysuit for premature infants
According to a WHO report, an estimated 15 million babies are born preterm (before the mother has reached 37 weeks of gestation) every year. More than one million of those infants die shortly after...
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