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sodnupta
@sodnupta
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Created
2018-01-06 03:59
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Wallet
sodnupta
electronics
8y
!
Low reputation account with an unverified outbound link, Reveal content
Project 6: Buck Converter (Adjustable Voltage)
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 ->
$ 0.000
0
2
sodnupta
electronics
8y
New Soldering Iron! - Hakko FX888D-23BY
New Soldering Iron! - Hakko FX888D-23BY
$ 0.000
0
sodnupta
electronics
8y
!
Low reputation account with an unverified outbound link, Reveal content
Project 5: 555 timer (Adjustable duty cycle)
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
sodnupta
electronics
8y
Oscilloscope capture 4: Button bouncing and mitigation
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
sodnupta
electronics
8y
Oscilloscope Capture 3: Inductive Spike and Mitigation
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
sodnupta
oscilloscope
8y
Oscilloscope Captures 7/14/18: Picking up switching controller noise from laptop charger
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
sodnupta
power
8y
!
Low reputation account with an unverified outbound link, Reveal content
Project 4: Regulated Linear DC Power Supply - Version 1
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
sodnupta
oscilloscope
8y
Oscilloscope Captures
7/3/18 Music from audio jack 7/1/18 RS-232 serial communication from DHT11 sensor 6/30/18 DC Motor Noise
sodnupta
oscilloscope
8y
!
Low reputation account with an unverified outbound link, Reveal content
First oscilloscope! Siglent SDS 1102CML+
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
sodnupta
arduino
8y
!
Low reputation account with an unverified outbound link, Reveal content
Project 3: Arduino, HC-SR04 Ultrasonic sensor, NRF24L01 transceiver, Active buzzer
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
sodnupta
arduino
8y
!
Low reputation account with an unverified outbound link, Reveal content
Project 2: Arduino, DHT11, DC motor and LCD display
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
sodnupta
hardware
8y
!
Low reputation account with an unverified outbound link, Reveal content
Project 1: Blinking LED
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
