A very basic 555 timer-based PCB where pressing a button activates an LED. Submission to HackClub Solder YSWS ...

Debugging was a matter of substituting the 2.4576 MHz crystal oscillator clock with a simple 1 Hz 555 timer circuit; the reduced clock speed made it easier to check voltages and monitor the status ...

Different filament colors were used to make the dustbin visually appealing. The smart feature of the dustbin is powered by an ultrasonic sensor and a small servo motor, controlled by an Arduino Nano ...

Its weather-resistant enclosure includes a 2.4-inch TFT LCD with 240×320 resolution, an OV2640 camera and a PIR motion sensor. Connectivity options include Wi-Fi for web access, a 433 MHz RF module ...

Allows users to calculate the optimal electronic components to select for desired 555 timer circuit behavior. There are many timers available on the web for calculating the behavior characteristics of ...

National Demonstration Center for Experimental Chemistry Education, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, P. R. China ...