Teardown: 12V AC adapters
https://www.electronics-lab.com/teardown-12v-ac-adapters/
Michael Dunn has done three teardowns of the worst 12V adapters and what he found is interesting. Yes! Can you believe it? This board used to be in another adapter housing, or more likely, in an end-product. It seems Chinese manufacturing has sunk to a new low: repackaging used and/or surplus power supplies. On the plus […]
Solar Cell IV Curve Tracer
https://www.electronics-lab.com/solar-cell-iv-curve-tracer/
This instructable shows how to build a photovoltaic cell curve tracer using Arduino and OPA549S OPAMPS. This projects shows how to create an IV (Current and Voltage) Tracer that can be used to teach the electrical characteristics of a solar panel. This project was created as part of an Electrical and Computer Engineering capstone project […]
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 […]
PIC16F628A Programmable Digital Timer
https://www.electronics-lab.com/project/pic16f628a-programmable-digital-timer/
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 functional, one-channel programmable relay switch using the PIC16F628A microcontroller. It allows you to set both ON and OFF time. The […]
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 […]