USB curve tracer for NPN transistors
https://www.electronics-lab.com/usb-curve-tracer-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 NPN transistors. This curve tracer is build around Microchip’s PIC18F4550 MCU and it […]
Basic Switching Voltage Regulator Tutorial
https://www.electronics-lab.com/basic-switching-voltage-regulator-tutorial/
James Lewis @ baldengineer.com discuss about switching regulator types and uses. A switching voltage regulator is one of my favorite circuits. In school, they were the first circuits I built where I understood how transistors worked. In fact, they were the first circuit I saw an inductor being useful! Switching regulators are incredibly efficient when designed […]
Arduino Body Thermometer + LCD I2C
https://www.electronics-lab.com/arduino-thermometer-lcd-i2c/
This is a body thermometer using a thermistor sensor, Arduino and LCD display. I’ve decided to provide a funny Arduino concept thermometer in case its the middle of the night, pharmacies are not working, you are not feeling well and you want to check your body temperature. If you have Arduino by your side, this is […]
Simple circuit provides precision ADC interface
https://www.electronics-lab.com/simple-circuit-provides-precision-adc-interface/
Moshe Gerstanhaber @ edn.com provides an simple ADC interface using instrumentation amplifier IC. Real-world measurement requires the extraction of weak signals from noisy sources. High common-mode voltages are often present even in differential measurements. The usual approach to this problem is to use an op amp or an instrumentation amplifier and then perform some type of […]
AAduino – Arduino Wireless in AA form factor
https://www.electronics-lab.com/aaduino-arduino-aa-battery-holder/
Johan wanted to shrink his Arduino based ISM radio node to fit in an AA battery compartment so AAduino was born. The AAduino is an wireless Arduino clone the size of an AA battery with Keystone battery terminals rotated 180° to act as positive and negative terminals. It is powered by an ATMega328p and is […]
PIC16F628A Programmable Digital Timer
https://www.electronics-lab.com/pic16f628a-programmable-digital-timer/
Raj Bhatt shared another project with us. This time is a programmable digital timer with relay switch based on PIC16F628A. Programmable relays find use in numerous automation applications such as automatic street light control, watering and pump control, HVAC, home automation, power plants automation in industries, etc. This article describes how to build a fully […]
Mini Arduino Lux Meter
https://www.electronics-lab.com/mini-arduino-lux-meter/
Here is a nice build of a LUX meter using BH1750 sensor and a Nokia 5110 LCD. The meter is controlled by an Arduino Pro Mini and is powered by a Li-Ion battery. The LCD backlight is controlled according to environment light and there is graphing capability of the measured light intensity. That’s when I […]
Control ESP8266 over the internet
https://www.electronics-lab.com/control-esp8266-internet/
Here is a basic tutorial on how to control ESP8266 over the internet using two buttons on a browser window. The article goes through Arduino IDE configuration and example code is included. There are but a few things better than (succesfully) programming and using your Arduino. Surely one of those things is using your ESP8266 […]
DIY Morning Feed With LED Matrix
https://www.electronics-lab.com/diy-morning-feed-led-matrix/
Here is a LED matrix able to show useful information such as weather forecast, temperature and stock updates. The matrix is controlled by a Particle Photon board. You wake up in the morning. You’re groggy. You grab your phone lazily and start browsing. You check the weather, your stocks, your instagram. Before you know it, you’re […]
Low-side I/V sensing IC, with internal power calculation
https://www.electronics-lab.com/low-side-iv-sensing-ic-internal-power-calculation/
Maxim Integrated has posted details of the MAX44299, a low-side current, voltage, and power monitoring circuit that provides an analogue output current proportional to the measured current, voltage, and the internally calculated instantaneous power. The power monitor offers high precision and integration in tiny size. Instantaneous power is calculated internally by multiplying the load current […]