Can an Arduino use a 12 V relay
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Dark and Light Activated Relay circuit diagram
The potentiometer adjusts the trigger level. The diode in the circuit diagram is specified as 1N914, which is suitable for light-duty relays; however, since the 1N914 is a signal diode, it is not ideal for this application. A 1N4001 diode...
Embedded Development on OSX
Fixed some issues with the Benito Arduino programmer and upgraded it to the latest version of the LUFA library. There was a mismatch between the INF file and the library-supplied descriptors. Apologies to the two XP users. As this is...
12v high/low battery monitor
R1 controls the trip-point of the circuit. adjust it accordingly. to reverse the logic (have the led light up when the battery has at least X amount of power,) connect the led to ground through R4. More: all resistors are...
Some Voltage Regulator Ciruits for Microcontroller based Projects
A regulated and noise-free power supply voltage is essential for microcontrollers and other components such as amplifiers, filters, and GPS devices. Voltage surges in the supply voltage can permanently damage embedded systems. A voltage regulator must maintain the output voltage...
Spitfire/GT6 Relay and Blinker Information
The Haynes manual is quite confusing regarding the labeling of relays on Spitfires. The two main sources of confusion are: 1. The illustrations depict right-hand drive cars with different relay locations, and 2. The naming of the relays is unusual,...
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...
spooky arduino projects 4 and musical arduino
The notes for the fourth and final class are available on the Spooky Arduino class page. At the conclusion of the class, Mark from Machine Project awarded each student a merit badge. A project utilizing techniques from this week's class...
DIY Arduino Powered Diversity
All necessary materials have been gathered to work on an Arduino-powered diversity controller. The design aims to support two inputs, although the hardware can accommodate up to four inputs, and features four amplified outputs. The diversity function will utilize Received...
motorcycle headlight with single spdt relay
A bike equipped with a 35-watt HS1 bulb is being upgraded to a brighter headlight using an H4 60/65-watt xenon bulb. An expert recommended using relays due to the increased power requirements of the new bulb. Research conducted on relay...