PIR Sensor
https://www.electronics-lab.com/project/pir-sensor/
This project is an automatic PIR sensor. Description Project is based on Holteks IC HT7610A, which is a CMOS LSI chip designed for use in automatic PIR lamp, flash or buzzer control. It can operate in 3-wire configuration for relay applications. In our project we have used relay instead of Traic to connect any kind […]
Sound Activated Switch – Relay
https://www.electronics-lab.com/project/sound-activated-switch-relay/
This project is a sound activated switch. Description Clap switch/Sound-activated switch designed around op-amp, flip-flop and popular 555 IC. Switch avoids false triggering by using 2-clap sound. Clapping sound is received by a microphone, the microphone changes the sound wave to electrical wave which is further amplified by op-amp. 555 timer IC acts as mono-stable […]
IR Remote Control Jammer
https://www.electronics-lab.com/project/ir-remote-control-jammer/
Introduction This circuit is a simple oscillator. Its frequency is in the range 35 kHz – 60 kHz and it’s adjustable. Notes D1 is an infrared LED Values of components are shown in schematic All resistors are 0.25w and all capacitors are 16v With RV1 you can adjust the frequency For best results circuit work […]
Programmable Home Security Alarm System
https://www.electronics-lab.com/project/programmable-home-security-alarm-system/
Introduction In this project we design low cost high performance programmable home security system and there is no need to contact a company like Safemart home security for setup. This system uses a few LDR’s as input sensors. When above sensor(s) get triggered system may dial the user specified phone number (using build-in DTMF generator) and […]
PIR Motion Sensor
https://www.electronics-lab.com/project/pir-motion-sensor/
Introduction The objective of this project is to use inexpensive PIR sensor to detect if a human has moved. To build this project I use a PIC18F25K20 microcontroller to detect if the sensor had change state and it will emit a sound from the speaker or piezo, the MCU also detect the voltage of the […]
Flood Detector
https://www.electronics-lab.com/project/flood-detector/
Introduction Last week I had a big flood in my house. A water tube broke in the middle of the night making lots of damage. Wooden floor, furniture, small electronic appliances, all damaged due to the water. This made me think on a project that would sense water on the floor and trigger an alarm. […]
IR remote extender
https://www.electronics-lab.com/project/ir-remote-extender/
This project describes how to build an IR remote control extender / repeater to control your electronic appliances from a remote location. An IR detector module receives IR signal from remote control and two IR leds are re-emitting the signal to the appliance. You can place the IR emitting leds close to the device you […]
Simple Touch Switch
https://www.electronics-lab.com/project/simple-touch-switch/
Description The MPF102 (Q1) can be replaced with a NTE451 or ECG451, but still widely available. JFET-N-CHAN, UHF/VHF AMP. The 2N3565 (Q1/Q2) can be replace with a 2N2222(A), BC107, BC108, BC109(A/B/C), NTE123A, or ECG123A. The TIP31 (Q3) can be replaced with a NTE196 or ECG196, but is a common type and widely available. NO […]
iButton electronic lock
https://www.electronics-lab.com/project/ibutton-electronic-lock/
Fig.1 Schematic diagram of iButton electronic lock Since iButton DS1990A introduced in market from Dallas Semiconductor (MAXIM), it has been used in many applications concerning security, access control systems etc. In this project we will use iButton as a key to an electronic lock. This electronic lock can use many different kinds of iButtons and […]
Water Level Alarm
https://www.electronics-lab.com/project/water-level-alarm/
This project is a water level alarm. Description Water Level Alarm is a simple project to detect and alarm once the water level in tank or Aquarium reaches at certain level. Circuit is based on popular NPN transistor BC547 which act as switch, Sensor also made on PCB, when the water reaches the sensor […]