Recent posts

#71

New Products release / ESP32-CAM now with 4MB PSRAM a...

Last post by olimex - June 16, 2025, 11:04:28 AM

ESP32-CAM now is updated with 4MB of PSRAM and 8MB of Flash for the same price EUR 10.95 https://www.olimex.com/Products/IoT/ESP32/ESP32-CAM/ #esp32 #camera #ai #iot

#72

New Product Ideas / Re: LiPo-UPS-5V or MOD-UPS-5V

Last post by LubOlimex - June 16, 2025, 08:38:29 AM

This setup will probably work, yes.

Either use the power jack cable or the terminal cable to the headers for the input on the SOM-EVB board, not both. This will lead to short circuit.

#73

FPGA / Re: Gatemate versions

Last post by LubOlimex - June 16, 2025, 08:28:20 AM

It is very important for a lot of software to run, my advice is to get the version with the SPI flash. For example, check this project (search in page SPI):

https://github.com/colognechip/gatemate_ila

Also check this previous post here:

https://www.olimex.com/forum/index.php?topic=9432.0

#74

New Product Ideas / Re: LiPo-UPS-5V or MOD-UPS-5V

Last post by ilario - June 14, 2025, 09:07:42 PM

I found this board from Adafruit that seems fulfilling the same goal (but without giving info on the battery status to the computer):
"PowerBoost 1000 Charger - Rechargeable 5V Lipo USB Boost @ 1A - 1000C"
https://www.adafruit.com/product/2465

With the matching power supply being out of stock on Adafruit but available on other distributors' websites.
"5V 2.5A Switching Power Supply with 20AWG MicroUSB Cable"
https://www.adafruit.com/product/1995

On the computer side, it would be complemented either by this cable:
"USB to 2.1mm Male Barrel Jack Cable - 22AWG & 1 meter"
https://www.adafruit.com/product/2697

Or these two pieces:
"Terminal Block - 2-pin 3.5mm"
https://www.adafruit.com/product/724
"POWER CABLE RIGHT ANGLE"
https://www.olimex.com/Products/Components/Cables/PWR-CABLE-RA/

#75

FPGA / Gatemate versions

Last post by freedomlives - June 14, 2025, 02:35:49 PM

What is the usefulness of the U3 2MB SPI flash? After almost 2 decades since I last touched an FPGA in university, I have an idea for a project that would need one, and I can afford the extra 3€ if that's going to make my life easier using the Gatemate board, I just don't understand what it is for!

#76

A20 / Re: Question about using SPI N...

Last post by LubOlimex - June 12, 2025, 03:04:57 PM

I don't think it will work. Look here:

https://linux-sunxi.org/BROM

Also I don't see SPI NAND listed in the boot diagram in the manual on page 95 (only SPI NOR):

https://github.com/allwinner-zh/documents/blob/master/A20/A20_User_Manual_v1.4_20150510.pdf

#77

A20 / Question about using SPI NAND ...

Last post by evelynwang - June 12, 2025, 02:28:26 PM

Hi everyone,

I'm designing a custom board based on the A20-SOM from Olimex and looking into replacing the standard NAND/eMMC flash with an SPI NAND solution (probably a 1Gb Winbond or GigaDevice part).

I've gone through the A20 datasheet and see SPI interfaces are available, but I'm not sure about bootloader compatibility or how U-Boot handles SPI NAND on this SoC. Has anyone here successfully used SPI NAND as the primary storage/boot medium with an A20-based system?

Would really appreciate any pointers—whether it's DTS changes, U-Boot configs, or just general lessons learned. Thanks!

#78

New Products release / Re: ADS1220 wiring on Raspberr...

Last post by LubOlimex - June 12, 2025, 12:57:38 PM

The clock is CLK.

Just connect AVSS and GND to GND of the Pi 4B.

For VDD and AVDD connect them to the 3.3V of the Pi 4B.

Maybe also check this project:

https://github.com/OLIMEX/BB-ADS1220/tree/master/SOFTWARE/OLINUXINO

#79

ESP32 / Re: ESP32-POE-ISO

Last post by LubOlimex - June 12, 2025, 12:46:09 PM

We don't maintain the MicroPython binary or code.

My advice is reach to the MicroPython community for what can be done.

#80

New Products release / ADS1220 wiring on Raspberry Pi...

Last post by Suasua44 - June 12, 2025, 12:21:17 PM

Hi everyone,

I'm trying to connect an Olimex ADS1220 on my Raspberry Pi 4B.

I'm a beginner with this kind of SPI ADC and I don't really know how to properly wire it to the RPi. Particularly, I don't understand why there is two AVSS pins and where is the SCLK pin.

Thank you in advance for helping me !

Sua