PIC Voltmeter Amperemeter can measure voltage 0-70V or 0-500V with 100mV resolution and current consumption 0-10A or more with 10mA resolution. The meter is a perfect addition to any power supply, battery chargers and other electronic projects where voltage and current must be monitored. The meter uses PIC16F876A microcontroller with built-in ADC (Analog to Digital Converter) and 16×2 green backlighted LCD display. With slight modification it is possible to measure higher voltage and current.
PIC Volt Ampere Meter – [Link]
This project shows how to build a data logger for humidity and temperature using the SHT11 or SHT15 sensor. This is a full digital sensor connected to AT90S8535 AVR microcontroller.
SHT11: Digital Temperature and Humidity Sensor - [Link]
This circuit is an audio amplifier circuit rated at 25W. It uses IC number LM1875, which is under the protection circuit IC output or Too short circuit and a significant distortion as low as 0.015% at a frequency of 1kHz.
25W Hi-Fi Audio Amplifier using ic LM1875 – [Link]
V-USB is a software-only implementation of a low-speed USB device for Atmel’s AVR® microcontrollers, making it possible to build USB hardware with almost any AVR® microcontroller, not requiring any additional chip.
V-USB: A Firmware-Only USB Driver for Atmel AVR Microcontrollers – [Link]
Kicad is an open source (GPL) software for the creation of electronic schematic diagrams and printed circuit board artwork. On the site below you can find two video tutorials on how to use the schematic editor and how to make a new PCB. Check the videos on the link below.
Kicad open source schematic and PCB software – [Link]
This article shows how to make a DIY Infrared illuminator to help Night Viewing of Your Camera. The IR Illuminator allows a camera to see in total darkness.
The IR Illuminator is based around our LED SpotLight PCB which holds a total of 24 LEDs on a circular PCB. The board is equipped with 24 special IR LEDs which do all of the work, along with 8 current limiting resistors. This project is very simple to build up, and can be fully assembled by a novice builder in about 30 minutes.
DIY Infrared Illuminator - [Link]
Using Eagle3D and POV-Ray you can make realistic 3D renderings of your PCBs. Eagle3D is a script for EAGLE Layout Editor. This will generate a ray tracing file, which will be sent to POV-Ray, which in turn will eventually pop out the finalized image of your PCB. Check the procedure on the following link.
Render 3D images of your PCBs using Eagle3D and POV-Ray - [Link]
These instructables discuss the basic aspects of creating a schematic and board using CadSoft EAGLE. Also discuss how to create library parts, how to modify design rules and how to send CAD files to manufactures. Read this series of articles below:
- Creating a schematic in Eagle
- Creating PCB from Schematic
- Creating Library parts
- Design rule modification
- Send CAD Files to manufacturers
Draw Electronic Schematics with CadSoft EAGLE - [Link]
This article discuss how to apply solder paste on PCBs step by step. Read about it on the link below.
Solder paste placement is probably the most critical stage of the PCB assembly process, and most assembly problems can be traced back to poor paste placement. If you want to avoid time-consuming manual rework on your assembled boards, it’s essential that you have a clean, precisely positioned layer of solder paste. A few extra minutes ensuring that your paste layer is correct can easily save hours of rework with a hot air gun and a soldering iron later. Thankfully, there’s nothing magic about it.
Solder Paste placement – [Link]
The project is “Motorized Curtain” with Remote control. It is made up of MCU ATMEGA328 with Arduino BootLoader, motor driver L293D ( i used L293B with external diodes, because i couldn’t find L293D ), IR Receiver TSOP 1738, DC Motor from an old printer and other small parts.
Motorized Curtain with Remote control - [Link]