Description: Input voltage: 24VAC (RMS) Output voltage: 3.64VDC ~ 16VDC Current rating: 1A Ripple: 24mV Buck converter IC: LM2575 Components: 1N4007 x 4 -> Bridge rectifier 100uF 50V capacitor ->

Description 555 Timer with adjustable duty cycle Frequency - about 4.5kHz Produces square wave Schematic Gallery Top View Bottom View (don't buy cheap soldering iron) 50% duty cycle 30% duty cycle Notes

Problem: LED turned on by a mechanical switch causes "bouncing" of voltage An LED is turned on and off by a rocker switch. Voltage is measured across the LED. The switch, as with other mechanical

Running DC motor with square wave Purple signal is the voltage at the transistor base, referenced to the common ground Yellow signal is the voltage at the transistor emitter, referenced to the common ground

Charger Plugged to Laptop Frequency reads about 98kHz We can tell that the charger uses 100kHz switching controller to regulate the voltage. Charger plugged off. Switching frequency increased to about

Description: Input Voltage: 120VAC Output Voltage: 9VDC Rated Current: 1A Power Factor: 0.50 Components: NEMA 1-15 power cord -> Not grounded 300mA fuse -> Protects the circuit from over-current

7/3/18 Music from audio jack 7/1/18 RS-232 serial communication from DHT11 sensor 6/30/18 DC Motor Noise

General Specs Bandwidth: 100MHz Real Time Sample Rate: 1GSa/s Channel: Dual Memory Depth: 2Mpts Rise Time: 3.5ns Vertical Resolution: 8 bit Price: $299 Two passive 100MHz probes included Startup Screen

Description: Ultrasonic alarm system Arduino 1: As a person comes closer to the ultrasonic sensor, an active buzzer will ring with higher frequency. The LEDs will also turn from green, yellow, to red based

Description: Read humidity and temperature data from DHT11 sensor Display humidity and temperature data on LCD module Turn on the fan (DC motor) when the temperature reaches 25C Increase the fan speed

Description: Generate square wave output using IC555 Pulse width modulation with diodes Adjust frequency with resistors Components: NE555P x 1 10kOhm resistor x 2 1N4007 diodes x 2 10uF capacitors x 2