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MicroSD card SPI schematic recommendation
If the Card is removed, the board will be powered off. Therefore would this be more appropriate? Some reference designs using 10uH chip inductors on the VCC line.  
Sunday, 1 May 2022 - 11:43
MicroSD card SPI schematic recommendation
Well, it's an audio capture application. I am capturing audio and storing it locally continuously, which then get transmitted using wifi over to a cloud storage.   If I am...
Saturday, 30 April 2022 - 17:36
MicroSD card SPI schematic recommendation
avrcandies wrote: A pull up or (down?) on the memory CS line might not bad idea.   You don't want CD floating while power up is applied & have the memory enabled....
Saturday, 30 April 2022 - 16:56
MicroSD card SPI schematic recommendation
DocJC wrote:  I have used pullups on all SPIs pins. Why?   Maybe I just need a little more sleep, or some caffeine, ...   I thought the SPI Bus did not...
Saturday, 30 April 2022 - 16:53
MicroSD card SPI schematic recommendation
Once the SD card is inserted it will not be changing. Do I need the additional resistor? If so what value?    
Saturday, 30 April 2022 - 12:44
Power Stability for electrochemical sensors ?
At the moment, I am taking 100 samples after every minute.   Would it be better to take 1 sample every 1 seconds, and then average over 60 samples?
Monday, 18 April 2022 - 20:24
SAMD21J18A - region `ram' overflowed by 1372 bytes
I am using a WiFi stack, which is using 75% of ram but I would like to store the certs onto the flash ROM.   So what do I need to do?
Friday, 8 April 2022 - 22:12
SAMD21J18A - region `ram' overflowed by 1372 bytes
Thanks   I have used Cosnt as in..    const uint8_t mycert_pem[]={0x30,0x82,0x03,0x8e,0x30,0x82,0x02...} //m2m_wifi_deinit(NULL);  m2m_wifi_download_mode...
Friday, 8 April 2022 - 20:52
SAMD21J18A - region `ram' overflowed by 1372 bytes
How can i close this post, has i noticed that the should have open the post on  Atmel Cortex-M MCUs | AVR Freaks  
Friday, 8 April 2022 - 20:32
SAMD21J18A - region `ram' overflowed by 1372 bytes
I am trying to get pstr() or somthing similar working with SAM devices?
Friday, 8 April 2022 - 20:19
Power Stability for electrochemical sensors ?
The only issue that could arrise is when the battery starts to get low, will have enough power for ldo on sensor board. I need to re check the minimum vin to get 2.5V.  ...
Tuesday, 5 April 2022 - 22:00
Power Stability for electrochemical sensors ?
At the moment VCC comes from my GSM module board, which is simply 5.5V from a Step-up DC-DC.  I do have the option of using 4.2V, directly from the battery....
Tuesday, 5 April 2022 - 21:35

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