ADC LED Volume Meter with Arduino Uno -- The Learning Circuit 94

Matt — Wed, 10 Feb 2021 08:24:00 GMT

Current Revision posted to Documents by Matt on 2/10/2021 8:24:00 AM

ADC LED Volume Meter with Arduino Uno

The Learning Circuit | element14 presents | Project Videos

www.youtube.com/watch

The audio signals interpreted by microphones are analog, but the circuits that process those signals are digital. In this build, Karen shows how to use the analog to digital converter in an Arduino Uno to process the audio signals from a stereo microphone kit that she made in a previous episode of The Learning Circuit. The converted digital signals are then used to display the volume on an array of LEDs. Check out the video to see how she does it!

Bill of Material:

Product Name	Manufacturer	Quantity	Buy KitBuy Kit
Red LED, Through Hole, 5mm, 20 mA, 2.1 V	LED TECHNOLOGY	3	Buy NowBuy Now
LED, Yellow, Through Hole, T-1 3/4 (5mm), 5 mA, 1.9 V, 587 nm	Multicomp Pro	2	Buy NowBuy Now
LED, Green, Through Hole, T-1 3/4 (5mm), 20 mA, 2.1 V, 570 nm	Multicomp Pro	3	Buy NowBuy Now
Through Hole Resistor, 220 kohm, 250 mW, ± 1%, Axial Leaded, 250 V	Multicomp	8	Buy NowBuy Now
Phone Audio Connector, Socket, 3, PCB Mount, Metal Body, Silver Plated Contacts RoHS Compliant: Yes	Lumberg	1	Buy NowBuy Now
Power Bank, 5V, 2.2 Ah Capacity, 2 Ports, 92 mm x 23 mm x 23 mm	MULTICOMP PRO	1	Buy NowBuy Now
USB Cable, Type A Plug to Type B Plug, 162 mm, 6.3 ", USB 2.0, White	AMP - TE CONNECTIVITY	1	Buy NowBuy Now
MK136 -Hobby Project Kit, Super Stereo Ear, Stereo Audio Amplifier, 2 x Microphones	Velleman	1	Buy NowBuy Now
Arduino Uno, ATmega328P MCU, 14 3.3V I/O, 6 Analogue Inputs, 6 PWM Outputs	Arduino	1	Buy NowBuy Now
Audio / Video Cable Assembly, Patch Hi Flex, 3.5mm Slim Stereo Plug to 3.5mm Slim Stereo Plug, 6"	MULTICOMP	1	Buy NowBuy Now
Pin Header, Board-to-Board, 2.54 mm, 1 Rows, 18 Contacts, Through Hole, MC34 Series	Multicomp	2	Buy NowBuy Now

Additional Parts:

Product Name
Computer with Arduino IDE
Arduino Uno Hat/Shield

Tags: arduino uno, analog-to-digital converter, arduino ide, the learning circuit, e14_makerkaren, phone audio, ard_beginner, adc

The Learning Circuit 94: ADC LED Volume Meter with Arduino Uno

tariq.ahmad — Wed, 15 Sep 2021 13:34:34 GMT

Revision 1 posted to Documents by tariq.ahmad on 9/15/2021 1:34:34 PM