Adafruit PDM MEMS Microphone Breakout
Product number: ADA3492
CHF 4.95
Available · 12 piece · 2-5 Tage
CHF 4.95
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Description
Product information "Adafruit PDM MEMS Microphone Breakout"
An exotic new microphone has arrived in the Adafruit shop, a PDM MEMS Microphone! PDM is the 'third' type of microphone that you can integrate into electronics, alongside analogue or I2S. These microphones are very commonly used in products, but are rarely seen in Maker projects. Nevertheless, they have some advantages, which is why we offer a breakout for the shop.
The first thing to note is that this sensor does not provide an 'analogue' output like many of our electret microphone assemblies. Therefore, it is ideal for chips that do not have analogue inputs. Secondly, the digital interface is a very simple pulse length modulation output. It's digital, but it's not PWM and it's not I2S. You need to make sure your chip has a PDM interface - most 32-bit processors these days do!
PDM is a bit like 1-bit PWM. You clock the microphone at a clock frequency of 1 MHz - 3 MHz, and on the data line you get a square wave synchronised to the clock. The data line outputs 0 or 1 logic level, with the square wave generating a density that gives the analogue value when averaged.
There are a few ways to manage these microphones:
Your chip comes with a hardware peripheral and a library that does all the data management at high speed, collects samples, applies a filter and gives you an analogue value (Ideal!)
Your chip comes with a hardware peripheral that gives you values, then it's up to you to do the decimation/filtering. (We have some example code for this on the ATSAMD21 chipset)
Your chip doesn't come with a hardware peripheral, but you're pretty clever and find a way to make it work (See this example for the ATtiny85)
You generate the high speed clock, then add an analogue filter on the data line and read the analogue value (A hack, but works!)
Whatever you decide, make sure you have a handle on what support you get with your platform as these chips are a little tricky!
Each order includes a fully assembled and tested microphone and a small header to solder for breadboard compatibility.
Features at a glance
- No analogue outputs - ideal for chips without analogue inputs
- Simple pulse length modulation output
- PDM interface required
- Compatible with most 32-bit processors
- Voltage range: 1.8-3.3V
- Clock frequency: 1 - 3.25 MHz
- Current consumption: 0.6mA
- SNR: 61 dB
- Sensitivity: ~-26 dBFS
- 1x fully assembled and tested microphone
- 1x header for soldering for breadboard compatibility
See this example for the ATtiny85 Instructions
Properties
| Zolltarifnummer: | 85423990 |
|---|---|
| Brand: | Adafruit |
| Country of Origin: | USA |
| EAN: | 4060137043185 |
| Gross Weight (kg): | 0.002 |
| Manufacturer ID: | 3492 |
| Product ID: | ADA3492 |
Manufacturer
Adafruit
Adafruit: The expert for open source hardware
For more than ten years, programmers and tinkerers have benefited from the expertise of the Adafruit brand. Whether for beginners or proven experts, Adafruit has the right hardware components ready for your next IoT project.
Light comes into the dark with Adafruit NeoPixel
One extremely popular product line from the company's broad portfolio is Adafruit NeoPixel. These nifty LED components come in a wide variety of designs and color temperatures. NeoPixel modules are available, for example, in the form of a practical stick with five intelligent LEDs in red, green and blue (RGB) or in white (W), as a shield with 40 eye-saving RGBW LEDs in which all pixels are individually addressable, and as a jewel with seven RGBW LEDs that can be controlled with 8-bit PWM per channel.
Especially popular is the Adafruit NeoPixel Ring with 16 ultra-bright, intelligent RGB LEDs including integrated drivers, which you only need a single microcontroller to control. The trick is that the Adafruit NeoPixel rings form a chain, so to speak: You couple the output pin of one with the input pin of the other.
With the Adafruit NeoPixel products you can realize a wide variety of projects - there are virtually no limits to your creativity. With the help of an Arduino, a jumper cable and the appropriate software, you can control a NeoPixel ring individually and light up the small LEDs as you wish - either individually or in a specific combination. This way, you can also create your own Vu meter with the versatile LED components. Practical: To make programming Adafruit NeoPixel easier, Adafruit provides an Arduino library as well as a Python library.
Adafruit Feather Boards: Powerful hardware in a compact format
With Adafruit Feather, the hardware specialist from the States also has various powerful development boards in its range, which are essentially equivalent to an Arduino in terms of function. All of these boards are equipped with similar features; among other things, the pin assignment is the same and there are also many parallels when it comes to the microcontrollers and the battery charging properties. In addition, you can also find Feather boards with special devices like Bluetooth, Wi-Fi and cellular network connectivity as well as boards with microSD slot in Adafruit's product range. The name "Feather" is no coincidence: The boards are also characterized by being particularly compact and, above all, lightweight.
The range of top-class product highlights is wide: The STM32F405 Feather, for example, is the fastest CircuitPython board from Adafruit with an outstanding 168 MHz and meets the highest demands. It is equipped with a STEMMA QT / Qwiic port at the end, which makes it easy to connect to I2C sensors. The Adafruit Feather nRF52840 Express, on the other hand, shines with Bluetooth Low Energy and can also be used with CircuitPython thanks to native USB support.
Another important part of Adafruit's portfolio are the FeatherWings. With these expansion modules, you can also include components such as a display or a motor driver in your IoT project. The FeatherWing Proto is a proven classic in Adafruit's portfolio. This is ideally suited as a prototyping add-on for all Feather boards. The Adafruit FeatherWing Wing Tripler Mini Kit, on the other hand, is ideal if you want to connect a Feather to two other FeatherWings at the same time.
With the Adafruit MIDI FeatherWing Kit you get a music capable FeatherWing, thanks to which you can equip your Feather with MIDI input and output jacks. And with the Adafruit FeatherWing OLED you can easily add a small OLED display to your Feather board - no soldering required.
Adafruit: What's behind the brand
As an expert in open-source hardware, Adafruit has long since established itself in the electronics industry. The company was founded in 2005 by Limor Fried. At the time, the talented and innovative electrical engineer was still a student at the renowned Massachusetts Institute of Technology (MIT). To this day, Fried is CEO of the electronics giant, which is now headquartered in New York. The company's name also goes back to its founder: Fried was once known on the World Wide Web by the nickname "Ladyada" - a tribute to the famous IT pioneer Ada Lovelace.
Adafruit says it is committed to getting more people excited about technology and science - and thanks to its first-class products, the hardware expert from the USA is sure to succeed!
Manufacturer and safety information
Adafruit Industries, LLC
168 39th Street 1905CC
US 11232 Brooklyn, New York
https://www.adafruit.com
support@adafruit.com
WEEE number: 20453810
Person responsible for the EU
Sertronics GmbH
Am Studio 20d
DE 12489 Berlin
https://www.berrybase.de
info@berrybase.de
Safety instructions
- Avoid direct mechanical stress or damage to the product.
- Only use the product in accordance with the manufacturer's instructions and specifications.
- Protect the product from moisture, extreme heat or cold.
- Do not operate in potentially explosive atmospheres unless expressly designed for this purpose.
- Ensure correct cabling and prevent short circuits.
- Only use compatible voltage sources and power supply units.
- Keep the product away from strong sources of electromagnetic interference.
- Avoid direct contact with water- or solvent-based substances.
- Dispose of the product in accordance with the applicable environmental and electronics regulations.
- Carry out recycling in accordance with the WEEE Directive or local regulations.
- For products with batteries, remove them before disposal and recycle them separately.
- Do not dispose of with household waste; use specialised recycling centres.
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