Breath Alcohol Tester controlling
#alcohol sensor
#breathalyzer
#gas sensor
#microcontroller
#analog output
#calibration
#health monitoring
#portable device
#safety
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ON/OFF button using Microcontrollers
Using a switch to power up your microcontroller projects may not be a good idea if you need to "wake" the PIC during some events. For example: A metal detector sends a pulse indicating a car is ready to enter...
home security system
The fundamental design of this project employs an Atmel AT89S8252-24PC Microcontroller, which features 2KB of EEPROM for runtime data storage. An ADC0838CCN analog-to-digital converter will be utilized to process up to eight inputs from sensor devices, including passive infrared sensors...
Microcontroller Voltmeter / Ammeter with LCD
The rectifier bridge voltage is determined by the U2 element; refer to its datasheet for the maximum voltage specifications. The minimum voltage at this pin should not fall below approximately 9V, or 6.5V if low-dropout type U2 and U3 voltage...
Industrial Building Automation System (IBAS) - 4
The two optical sensors will provide a count of individuals to the microcontroller, which will relay this value to MCU-II. The microcontroller will detect the entrance of any person through high-to-low pulse transitions on input pins A3 and A4.
The circuit...
Microcontroller and Motor Driver Circuit Board
Efforts were made to minimize the number of wire jumpers on this board, but space constraints arose due to the integration of the microcontroller and motor driver on a single board. The design would have been cleaner without the inclusion...
Microcontroller
The gap between TTL (Transistor-Transistor Logic) devices and personal computers can be effectively bridged with modern microcontrollers. These microcontrollers not only incorporate a central processing unit (CPU) but also include program and data memory, EEPROM, input/output (I/O) ports, timers, and...
microcontroller How does this power supply circuit work? (MCU + LM317)
The filter consisting of resistors R1, R2, and capacitor C1 integrates the PWM waveform. The purpose of the operational amplifier appears to be that of a non-inverting amplifier, with the gain determined by resistors R6 and R7. However, the need...
Password Based Door Locking
Security is a prime concern in our day-to-day life. Everyone wants to be as much secure as possible. An access control for doors forms a vital link in a security chain. The microcontroller based Door locker is an access control...
Robo Atmega328p project
This project was designed to introduce a friend to microcontrollers and circuits using various functionalities and spare parts. A PS2 numpad was utilized as the key entry mechanism, which was found at a thrift store and included the necessary connector....