Content for Keypad

DIY passcode lock system using Arduino(EEPROM based)

“Have you ever seen Passcode lock system in some office and in some homes, its really interesting and cool right ! .It will make our home secure and smart i mean automated.it is a small part of home automation. I …

LDMOS Amplifiers

“Frequently I will install a control system to later find out —it doesn’t work or work properly. Have you been there? My aim with this project is to find those anomalies and “gotcha’s” before the first wire is …

How to Build a Simple Arduino-Based Calculator

“Learn how to use an LCD display in combination with a keypad and an Arduino to make a calculator. Although calculators have been around for thousands of years, electronic ones have been dominating the world for decades. From basic to …

Arduino Password Security System with magnetic door sensors

“In this Instructables guide I will show you how to make your own password security system by using the Arduino uno board and some magnetic door switches. I made my own circuit by using the ATmega328 micro controller but this …

Build an Arduino-Controlled AM/FM/SW Radio

“The idea of a single chip radio is intriguing. The prospect is especially interesting to me because, frankly, I envy the analog skills I associate with building a radio receiver. When I browsed the circuit literature in the area, I …

Project  Rallytimer

Rallytimer

“A rallytimer is a really intresting device to improve your rating during a regularity rally. As you know, its quite difficult to give the notes, check the time and the distance at the same times. Furthermore, timetables are often really …

Arduino Password Unlock Door Security System

“Hello! In this Instructables guide I will show you how to make your own password unlock door system by using the Arduino uno board. I made my own circuit by using the ATmega328 micro controller but this is an optional …

Arduino Treasure Hunt

“I have always liked movies like National Treasure and the like. Ones that has a team of people that are running all over trying to solve some riddle or a string of riddles to, get the gold, get the girl …

DIY CNC Accessories (Dust Collector, Heatsinks, Feet, Pendant)

“I thought I’d share the accessories that I’ve made for my CNC machine. They get plenty of use and most are easy to make. I used a Dremel 3D printer and a Printrbot Metal to make the 3D …

Nixie Tube Kitchen Timer

“This is a kitchen timer with nixie tubes as its display.”