Beginning Embedded Electronics 4 circuit

This is my long history the device that controls my home's night light, air-conditioner, etc. The device is a Miniature Real-time Controller. The circuit uses only three chips, a 89C2051, DS275 (or MAX232), and 74LS07 open collector driver. The scheduler...

DIAL ALARM-1

This is the lowest cost dialing alarm on the market and shows what can be done with an 8-pin microcontroller. The complete circuit is shown below. You cannot see all the features of this project by looking at the circuit...

synchronizing fireflies ng

This is a remake of the fireflies project that was created a year ago. The concept revolves around the emergence of patterns, particularly the synchronization of hundreds or thousands of fireflies. Initially, they flash randomly, but over time, influenced by...

Microcontroller measures heart rate through fingertip

The reflected infrared (IR) signal detected by the photodiode is sent to a signal conditioning circuit, which filters out unwanted signals and amplifies the desired output. The circuit begins with a photodiode that captures the reflected IR signals. The photodiode operates...

Hum Circuit

The kit employs an off-the-shelf microcontroller based on the AtMega328P-PU Arduino, along with a simplified version designed for ease of replication and modification by collaborators and students. This initiative aims to enable the fabrication of simplified microcontrollers for DIY synthetic...

Help with a schematic please

A project is underway to construct the CountryHick DI as illustrated on DIYFactory, incorporating a few minor modifications. The final design aims to be a 1U unit with four inputs. The CountryHick DI (Direct Injection) box is a crucial tool in...

Jet

The microcontroller is able to make about 7000 complete line-following decisions per second, which is almost 7 decisions per millimeter when the robot is going full speed. By upping the clock, unrolling loops, and removing my wireless debugging and extraneous...

Electronic TIC TAC TOE

This project is not to introduce Tic Tac Toe. Everyone knows this game. It is to introduce two features: bi-coloured LEDs, microcontrollers, and the skill of writing an ALGORITHM. You can use the project to learn the skills of creating...

Robot Motor Control Schematic

The schematic for controlling the motors is divided into three main sections, each serving a distinct function. The primary components featured in the schematic include the PIC 18F252 microcontroller, the SN754410 motor driver, and 2N2222 transistors. At the top of...