Category: Test/Measurements
![Build a Cloud-Connected ESP8266 Power Meter Build a Cloud-Connected ESP8266 Power Meter](https://www.electronics-lab.com/wp-content/uploads/2016/05/sensors_hw-e1464077247725.jpg)
Build a Cloud-Connected ESP8266 Power Meter
Measure the DC power consumption of your devices on the cloud @ adafruit.com Controlling the electrical consumption in your home is one of the most important thing you can do, both because of environmental concerns & to reduce the electricity bill at the end of the month. There...
Continue Reading![4 Wire Resistance Measurement – Kelvin connection 4 Wire Resistance Measurement – Kelvin connection](https://www.electronics-lab.com/wp-content/uploads/2016/05/4-wire-resistance-measurement-ke-1024x576.jpg)
4 Wire Resistance Measurement – Kelvin connection
This video describes and demonstrates the 4-wire resistance measurement (Kelvin connection) - what it is, and when & why it is used for making low valued resistance measurements. 4 Wire Resistance Measurement - Kelvin connection -...
Continue Reading![Building a PIN Diode Geiger Counter Building a PIN Diode Geiger Counter](https://www.electronics-lab.com/wp-content/uploads/2016/05/Photodiode-with-Liquid-Rubber-Coating-1024x683-1024x683.jpg)
Building a PIN Diode Geiger Counter
"Kai" is in the process of building a Geiger counter based on BPW34 photodiode and explains his first step for the sensor circuit. The common approach to protect the photodiodes from light is to use one layer of tin foil and connect it to ground. This should also protect the...
Continue Reading![Wireless digital scale Wireless digital scale](https://www.electronics-lab.com/wp-content/uploads/2016/05/F9IVS3JIO7EMPYQ.MEDIUM.jpg)
Wireless digital scale
This is a wireless digital scale using ATTiny85 microcontroller and HM-10 Bluetooth low energy transmitter/receiver: This scale is wireless. It may be useful where you can't operate a normal scale, due to the weather outside, or if you don't want to scare birds or other creatures...
Continue Reading![Sensing current on the high side Sensing current on the high side](https://www.electronics-lab.com/wp-content/uploads/2016/05/hisideDiffAmp.gif)
Sensing current on the high side
Michael Dunn@ edn.com discuss about current sense on the high side of power source. At their heart, the majority of DC current sense circuits start with a resistance in a supply line (though magnetic field sensing is a good alternative, especially in higher-current scenarios). One...
Continue Reading![Simple crystal tester Simple crystal tester](https://www.electronics-lab.com/wp-content/uploads/2016/05/26656519722_cdebd7e170_z-600x398.jpg)
Simple crystal tester
Dilshan Jayakody build a simple crystal tester based on Colpitts oscillator. He writes: This is simple Colpitts oscillator to test commonly available passive crystals which range between 2MHz to 27MHz. This unit must connect to an oscilloscope and/or frequency counter to get the...
Continue Reading![Using a Current Shunt with a Panel Meter / Ammeter scale change Using a Current Shunt with a Panel Meter / Ammeter scale change](https://www.electronics-lab.com/wp-content/uploads/2016/05/using-a-current-shunt-with-a-pan-1024x576.jpg)
Using a Current Shunt with a Panel Meter / Ammeter scale change
This video gives you the basics of how to calculate and use a simple resistive current shunt with an analog panel meter to change the current that is needed for a full scale deflection. The notes page for this video can be found here. Using a Current Shunt with a Panel Meter /...
Continue Reading![USB curve tracer for NPN transistors USB curve tracer for NPN transistors](https://www.electronics-lab.com/wp-content/uploads/2016/04/2SC945-600x342.png)
USB curve tracer for NPN transistors
Dilshan Jayakody documented his USB port base NPN transistor curve tracer project: Curve tracer is an electronic test instrument to analyze the characteristics of transistors and other discrete semiconductors. In this post we construct USB base curve tracer to analyze properties of...
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