Arduino Nightlight
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LED Dimmer Lighting
A dimmer for individual LED bulbs. LEDs (light emitting diodes) are very sensitive components; exceeding their rated current or voltage can drastically reduce their lifespan from over 50,000 hours to mere microseconds. LEDs are current-driven, meaning that the intensity of...
LED Flashlight circuit with MAX1811
White LEDs have a rated current at a voltage drop of about 3.3 to 3.4 V. It is ideal to be powered from the battery voltage which is slightly larger. Then there is the best energy used. In this I...
Christmas LED Lights Circuit
This simple Christmas LED lights decoration circuit allows for the creation of an 18 LED flasher to adorn a Christmas tree. The circuit incorporates white, blue, and red LEDs that flash in a festive pattern.
The circuit is designed to operate...
1.5 Volt LED Flasher Circuits
The LED flasher circuits below operate on a single 1.5 volt battery. The circuit on the upper right uses the popular LM3909 LED flasher IC and requires only a timing capacitor and LED. The top left circuit, designed by Andre...
Voltage Controlled PWM Generator
Circuits that generate PWM pulses typically translate a resistor value into a change in duty cycle. While this method is convenient, there are instances where a voltage-controlled PWM generator is required. Although microcontrollers can produce a variety of PWM signals,...
Pulse Width Modulation DC Motor Control
Often, people attempt to control DC motors with a variable resistor or variable resistor connected to a transistor. While the latter approach works well, it generates heat and hence wastes power. This simple pulse width modulation DC motor control eliminates...
Arduino Differential Controller
Faulty readings from the DS18B20 temperature sensors used in tank thermometers were likely caused by the waterproofing method involving heat shrink and silicone. This situation provided an opportunity to enhance the code for better tolerance against erroneous readings. The tank...
Arduino Master Reader
In certain scenarios, it can be beneficial to configure two or more Arduino boards to exchange information with each other. This example demonstrates a Master Reader/Slave Sender setup using the I2C synchronous serial protocol. The first Arduino, designated as the...
Economical Desk Lamp For Camping
This LED lamp was originally designed for use in a budget solar-charged 12V electrical system. It provides sufficient brightness for comfortable reading at night.
The LED lamp operates on a 12V power supply, making it suitable for integration into solar-powered systems...