automatic aquarium feeder circuit

This timer is intended for individuals seeking to achieve a tan while minimizing excessive exposure to sunlight. A rotary switch adjusts the timer based on six categorized photo-types. A photoresistor modifies the preset time value in relation to sunlight brightness....

Sequential-timer

The timer circuit provides independent control over the output's on and off intervals, which can vary from 0.055 seconds to 30 minutes, and remains relatively unaffected by power-line transients. IC1 is a CMOS programmable timer chip that consists of 24...

Programming Arduino Wirelessly

The Arduino system provides a straightforward and open-source approach for programming microcontrollers. Typically, this involves using a serial or USB cable directly connected to the microcontroller project. However, challenges arise when the project is located in inaccessible areas, such as...

arduino Selecting the right relay

A 5V power supply is used to function as a switch controlled by an Arduino. Direct control from the Arduino pin is not feasible because most general-purpose relays require a minimum of 150mW to activate, which translates to over 30mA...

Servo controlling circuit

This circuit takes a standard 0-10V control voltage (for example, from an analog light control desk) and outputs a standard 1-2 ms control pulse for RC servo motors. The components used in this circuit include: - 2 x 100 kΩ...

The Universal Timer with description

The Universal Timer is a highly versatile timer project that accommodates a wide range of time periods, from 1/10th of a second to 100 hours. This circuit diagram includes a comprehensive description of various timer circuits associated with the universal...

Two Simple 24-Hour Timer Circuit Schematics

These two circuits are multi-range timers that offer periods of up to 24 hours and beyond. They can function as repeating timers or single-shot timers. Both circuits are fundamentally the same, with the primary distinction being their behavior in single-shot...

arduino clone

It appears to be a common practice for individuals to construct their own Arduino-compatible boards after achieving a certain level of skill. In fact, there is a desire to gain a deeper understanding of the Arduino platform by assembling it...

sd card logging

This documentation was compiled as a result of a bee hive temperature monitoring project. Multiple DS18B20 temperature sensors were used to sense the temperature at various locations in the hive. An Arduino with a Nuelectronics sensor shield was used to...