Simple SMD LED tester
https://www.electronics-lab.com/project/simple-smd-led-tester/
This project is a simple LED tester and LED polarity checker. It can be used to check 1206, 0805, 0603 and 5mm LEDs. All parts are readily available and they are very cheap. Description Usage is very simple. Just press the tack switch to first check the battery is good. The blue led will […]
Low Frequency Spectrum Analyzer for Automotive Suspension Analysis
https://www.electronics-lab.com/project/low-frequency-spectrum-analyzer-for-automotive-suspension-analysis/
This project is an accelerometer data acquisition system for automotive suspension analysis. In other words it’s a low frequency spectrum analyzer based on Lanchpad TIVA Series from Texas Semiconductors. Description It’ s a spectrum analyzer for mechanical frequencies (max. 50 Hz). In my application I use this analyzer for the signals from a suspension of […]
TraId – Transistor Type & Polarity Identifier
https://www.electronics-lab.com/project/traid-transistortype-polarity-identifier/
TraId is a simple transistor tester and pinout identifier. It is able to test bipolar transistors as well as N-mosfet and P-mosfet. Result are displayed using LEDs driven by a PIC16LF1503 microcontroller. Description The board is using a 14 pin PIC16LF1503 (less than a dollar in singles) and runs on a single CR2032 battery. […]
PIC16F688 Digital Voltmeter
https://www.electronics-lab.com/project/pic16f688-digital-voltmeter/
Introduction This project describes how to make a digital voltmeter using a PIC microcontroller. A HD44780 based character LCD is used to display the measured voltage. The PIC microcontroller used in this project is PIC16F688 that has 12 I/O pins out of which 8 can serve as analog input channels for the in-built 10-bit ADC. […]
Digital Room Thermometer
https://www.electronics-lab.com/project/digital-room-thermometer/
Introduction Room temperature plays a vital role in determining human thermal comfort. This digital thermometer is designed to measure room temperature and display it on a LCD screen in both Celsius and Fahrenheit scales. A PIC16F688 microchip is used as the main controller that reads temperature from DS1820, a 3-pin digital temperature sensor from Dallas […]
PIC16F84A Gas Detector using GH-312 sensor
https://www.electronics-lab.com/project/pic16f84a-gas-detector-using-gh-312-sensor/
Introduction This is a gas detecting circuit capable of sensing many different types of gases. The sensor used is the GH-312 and from the datasheet it is capable of sensing gases like smoke, liquefied gas, butane and propane, Methane, alcohol,hydrogen, etc. Schematic Parts List R1 1K resistor R2 1K resistor P1 100K potentiometer C1 10uF […]
DDS Function Generator
https://www.electronics-lab.com/project/dds-function-generator/
A new implementation of the AVR DDS signal generator v2.0 found at: http://www.scienceprog.com/avr-dds-signal-generator-v20 Introduction This is a new implementation of the AVR DDS signal generator v2.0, already published in scienceprog.com. It is obvious that full credit for the original schematic and the firmware goes to its original creator. Presented here is a different PCB that is compact, […]
Single Chip Temperature Data Logger
https://www.electronics-lab.com/project/single-chip-temperature-data-logger/
Introduction A data logger is a device that records measurements over time. The measurements could be any physical variable like temperature, pressure, voltage, humidity, etc. This project describes how to build a mini logger that records surrounding temperature values. It has following features: Uses just one 8?pin chip, so very compact size circuit. Temperature range: […]
Ultra High Sensitive Probe
https://www.electronics-lab.com/project/ultra-high-sensitive-probe/
Description This circuit is so sensitive it will detect “mains hum.” Simply move it across any wall and it will detect where the mains cable is located. It has a gain of about 200 x 200 x 200 = 6,000,000 and will also detect static electricity and the presence of your hand without any direct […]
Voltmeter + Ammeter LCD panel
https://www.electronics-lab.com/project/voltmeter-ammeter-lcd-panel/
Introduction This multimeter was designed to measure output voltage and current in a PSU, where the current sense shunt resistor is connected in series with load at the negative voltage rail. It needs only one supply voltage that can be acquired from main PSU. An additional function of the multimeter is that it can control […]