Search Results for : 7805
Zener Diodes In Theory and Practice
David Jones made a tutorial on the fundamentals of zener diodes over his EEVblog youtube channel. David started the tutorial comparing between zener and regular diode. Both have the same characteristics and same I-V chart, but zener is designed to work in the negative voltage...
Continue ReadingEagle CAD Tips and Tricks Part 2
This is the second and final article of the Eagle Tips from allaboutcircuits.com: Before searching on the internet for new libraries to add to Eagle, first make sure that your device does not already exist in your local libraries. To check, use a search pattern that includes...
Continue ReadingPIC16F628A 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...
Continue Reading5V & 12V Regulated Power Supply
This project can be used to power up TTL and CMOS based projects, it provides 5 VDC & 12 VDC outputs with an onboard mains transformer. The project is based on the industry popular 7800 series voltage regulator in TO220 packages. Features Input: 240 VAC Output: 5 V, 12...
Continue ReadingProgrammable Home Security Alarm System
In this project we design low cost high performance programmable home security system using few LDR’s as an input sensors. When above sensor(s) get triggered system may dial the user specified phone number (using build-in DTMF generator) and activate the high power audio alarm and...
Continue ReadingDarkroom 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...
Continue ReadingMultipurpose 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...
Continue ReadingPIC 18F – 28 PIN PIC Development Board
This is a PIC18F Development board with ICSP connector. Description This is a versatile, configurable, and cost effective Development Board designed for the 18F 28 pin series of Microcontroller from Microchip. The board is simplest form with all the Port pins terminating in a...
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