First time here? Check out the Tour!
I have to sample audio signal from a microphone (MAX 9814 adafruit) with the nrf52 board. I use the saadc and then I perform a FFT of the data using the sdk 13 examples. My idea is to sample ... (more)
Hello! I have to connect some microphones (adafruit MAX9814) to a nrf52 board and I have to choose some beacons. My idea is to have a tiny solar panel that charges a capacitor in each beacon (maybe together with a ... (more)
some time ago I was struggling with interfacing an I2S microphone with the nRF52832. That remained unsuccessful. My conclusion back then was that the selected I2S microphone and the nRF52832 were incompatible (the mic wanted 32-bit word size, which ... (more)
Hi, my setup is:
My project concerns about:
I'm working on a 2.4GHz wireless microphone (2T1R) project now. I'm wondering can I use nRF24L01+ as the core of transmitter and receiver? Also can it be configured into 2T1R? For the Nordic website, I found the ... (more)
I am connecting the AKU242 straight to our microprocessor. It is a PDM interface so it has a SELECT, DATA, CLOCK, VDD and 5 GND signals. On the datasheet, there are two identical PDM microphones with one SELECT connected ... (more)
What is the most energy efficient microphone input method, PCM via I2S or PDM. Does the SoC have a special HW handling of the PDM format for converting to PCM? Does the filtering of the 1 bit conversion compete with ... (more)
I'm starting a new design on nRF52 and I need to connect a microphone on it. Reading the datasheets and questions here, I found there's 3 solutions for the type of microphone and interface to nRF52 :
I am using a digital microphone using i2S interface with the following signals: BCLK (bit clock), WS (word strobe), SELECT (select for Left/Right) and SDOUT (digital data output).
On nRF52 there are five main signals for i2S including MCLK ... (more)
I'm looking to integrate a digital (PDM/I2S) MEMS microphone into my nRF51822-based design. I'd like some pointers to reference designs or other information -- the ones that seem relevant on the Nordic site (nRF6929) are locked :(
Has anyone ... (more)