Category: Test/Measurements

Luca Dentella has build a Nixie thermometer to measure the temperature of the liquid cooling system, file are available on Github. I decided to log the design and the development of the project in ten blog posts. They show my “divide et impera” approach: I divided the whole...

Glen Chenier @ edn.com wanted to find out the characteristics of an unknown diode to be able to replace it with an equivalent one so he decided to make some measurements using his test equipment. In this article he show us how to measure the junction capacitance, Cj, and reverse...

Dan Watson @ syncchannel.blogspot.com wanted to have more fun with his MightyOhm Geiger Counter so decided to add an OLED display and Wifi capability to it. To achieve that he modified the counter, added a Feather HUZZAH ESP8266 with OLED FeatherWing and wrote some code. The process...

BoianM @ instructables.com shows us how to build a remote temperature and humidity display using DHT11 sensor and two ESP8266 modules. To program the ESP8266 modules a visual programming software is used. The advantage of the ESP8266 over Arduino and other controllers is the builtin...

TSalwach @ github.com build a 3-phase home power meter system. A STM32F072RB MCU on Nucleo evaluation board make measurements and Raspberry Pi 1 collects data and share via web interface. I want to have real time power measurement of my home in my smartphone. I've got one some long...

The circuit is a simple digital frequency meter that is made of a frequency-to-voltage converter and an analog-to-digital display converter that can be operatedfrom a single 9-volt battery. The TC7126 ADC generates the voltage required by the TC9400 FVC with internal regulators. The...

Brian Dorey has designed a mains energy monitor based on ESP8266 that have sensors for the mains current, electric meter and gas meter. As the new solar logger did not have this functionality we decided to design a new data-logger that would measure not only the mains current usage...

ManosM @ instructables.com has build a portable ultrasonic range meter based on ATMega328 mcu and LCD display. This device is a small, portable ultrasonic range meter using an ATMega328 microcontroller, an ultrasonic module and a 4x20 LCD for ranging distances in meters and...