K-Tech

  DIY Tutorial Resetting Toner Chip on Ricoh SP C250DN Printer in Simple Steps The RICOH SP 250DN printer toners have a chip that keeps track of the number of pages that have been printed. This is anoying because it will render a refill useless. In order to reuse this kind of toner, there are two things you need to do: refill the toner with ink (if needed) reset the toner chip (or replace it) There is plenty of information explaining how to refill the toner but little information on how to erase the toner chip. This document deals with the second point: how to dump the chip and reset it. It took me a while to get everything setup and to have my toner chip reset so I would like to share this process in order to help other to do the same with their printer toner cartridges. I will step through the process of understanding the problem, analysing the chip circuit, dumping the chip contents and writing back a pattern so the printer will be able to initialize the chip and set t...

DIY Smart Home Automation Control Your Home with Bluetooth using Android Phone and Arduino Hi guys, In this tutorial we are going to control home appliances with voice command. You have to just press the google mic button and give command to turn ON or OFF Light. So let’s get started. For making this project, You will need Arduino uno, Bluetooth module (HC-05), 2 channel Relay module,  (You can use 8 channel relay depends on your project), Jumper Wire, Breadboard. Do connection as shown in diagram. Why we are using voltage divider for Rx pin of Bluetooth module? Sending data from Tx pin of Bluetooth module required 3.3V, which is accurately given by Bluetooth module. But main problem is with Rx pin, it require 3.3V and we know arduino Tx pin is running on 5V. So we have to use voltage divider in order to reduce voltage to 3.3v. This is the reason I am using two resistor. You can use any combination of resistor for example 1k and 2k ohms resistor, as I am using in this tutorial...

  DIY Metal Detector using Arduino A Simple Guide to Building Your Own at Home How does a metal detector work? As we can see there are three things that are using to complete the whole project. Electronic circuit, Arduino, and a copper coil. here actually we are making a proximity sensor that detects the metal with a  metal detector  using Arduino . Here are the steps to build a DIY metal detector using an Arduino: Materials required: Arduino UNO Copper coil Diode 10nf capacitor Buzzer Led 220 ohm &  330 Ohm Resistor Jumper wires and a breadboard USB cable for uploading the code Circuit Diagram Arduino metal detector:-  Arduino UNO 10 nf Capacitor A2 Pin Terminal 1 GND Terminal 2 Arduino UNO Buzzer D6 Pin Positive GND  Negative Arduino LED 220 Ohm Resistor D5 Pin   Terminal 1   Anode Pin Terminal 2 GND Cathode Pin   Arduino UNO Copper coil Diode 330-ohm res   Terminal 1 Terminal 1 Terminal 1 A1 Pin     Terminal 2 A2 Pin ...

Solar Lights Auto OnOff and Home Automation with an Arduino Uno and LDR Module A Simple Guide: Automatic street light control is used to control the street lights(Turn on and off based on the light). Here we make use of LDR(Light Dependent Resistor) and LED(Light Emitting diode) and arduino. Hard Ware Components Required: 1) LDR 2)LED 3)4.7k Resistor 4)Bread Board 5)Connecting wires 6)Arduino LDR is used to detect the light, Arduino is used to on/off the Light. Hardware Connections.- Arduino 3rd pin connected to LED +ve Arduino GND connected to LED -ve through 4.7k Arduino +5v is connected to LDR One End Arduino A0 pin is connected to LDR other end Arduino GND is connected to LDR other end with 4.7k Arduino Step 1: Programming, Compiling and Uploading to Arduino // Program related to LDR and LED interfacing to Arduino #include <SoftwareSerial.h> int sensorPin = A0; // select the input pin for the LDR int sensorValue = 0; // variable to store the value coming from the sensor int l...

Getting Started with Arduino and PIR Sensors for Home Security: An Easy Guide to Implementing Motion Detection with Code Arduino Motion Sensor/Detector Project using PIR Sensor Detecting motions or movements has always been important in most projects. With the help of the PIR Sensor it has become very easy to detect human/animal movements. In this project we will learn how we can  interface a PIR Sensor with a microcontroller like Arduino . We will  interface an Arduino with PIR module  and blink a LED and beep a Buzzer whenever a movement is detected. The following components will be needed to build this project. Materials Required: PIR Sensor Module Arduino UNO (any version) LED Buzzer Breadboard Connecting Wires 330 ohm resistor PIR sensor:    The PIR sensor stands for Passive Infrared sensor. It is a low cost sensor which can detect the presence of Human beings or animals. There are two important materials present in the sensor one is the pyroelect...