USB Single Cell LiPoly Charger

https://www.electronics-lab.com/project/usb-single-cell-lipoly-charger/

Introduction Lithium Polymer Batteries are a very common source of power today. Many electronics gadgets have one inside, and they have some reasonable features. I’ve bought great batteries, with different sizes and capacities for my electronics projects. So long I’m using this batteries, coming the problem: charge them. Charger Version 1 So, we start to […]

Darkroom Timer v2.0A for PCB Exposure Box

https://www.electronics-lab.com/project/darkroom-timer-v2-0a-for-pcb-exposure-box/

  PIC based automatic timer for a PCB exposure box This is an improved version of the Darkroom Timer originally created by Stan Ockers (1999). Some extra features were added and the PIC code was modified accordingly. Lamp(s) light at start of timing and turn off when timer reaches zero. A set of leds were […]

3.3V Voltage Regulator

https://www.electronics-lab.com/project/3-3v-voltage-regulator/

  This project is a 3.3V Voltage Regulator Description This project  will provide 3.3 V @ 800 mA DC Regulated Supply.  The project is based on the LM1117 Low-Dropout Linear Regulator. The LM1117-3.3 is a low dropout voltage regulator with a dropout of 3.3V @ 800mA of load current. Specifications Input – 5 to 15 […]

RS232 to RS485 Module

https://www.electronics-lab.com/project/rs232-to-rs485-module/

  This project is a RS232 to RS485 interface module Description This project provides a simple and easy solution to connect your computer to a RS485 Network in either Receiver or Transmitter mode. This circuit has been designed around popular MAX232 and MAX485 interface IC. An Onboard 9 pin female “D” connects this PCB to […]

12V Lead Acid Battery Voltage Monitor

https://www.electronics-lab.com/project/12v-lead-acid-battery-voltage-monitor/

This project is a 12V Lead Acid Battery Voltage Monitor Description 12V Lead Acid Battery Monitor is a simple project which tells you the voltage of your Lead acid battery visually with the help of 10 LED’s.  This project is based on the popular LM3914 IC from Texas Instruments. The LM3914 senses the voltage level […]

Multipurpose 18 PIN (16F628A) Microcontroller development board

https://www.electronics-lab.com/project/multipurpose-18-pin-16f628a-microcontroller-development-board/

  This is a 18 PIN (16F628A) microcontroller development board Description This project is a versatile, configurable, and cost effective development board available for the 16F628A or other 18 PIN Microcontroller from Microchip. The board has simplest form with all the Port pins terminating in a Relimate connector (Header Connector) for easy connection to the […]

Appendix

https://www.electronics-lab.com/article/appendix/

PLL

https://www.electronics-lab.com/article/pll/

Operational Amplifiers

https://www.electronics-lab.com/article/operational-amplifiers/

MOSFETs

https://www.electronics-lab.com/article/mosfets/