Linas Karpavicius's Blog - All Comments

RE: X - Ray machine

sfc — Mon, 13 Feb 2023 02:16:59 GMT

Do you have a board like this for sell?

RE: Homemade High resolution X-Ray scanner !

dubbie — Fri, 10 Jul 2020 10:34:37 GMT

Theer are some interesting images and the rose is great.

Dubbie

RE: Homemade High resolution X-Ray scanner !

DAB — Thu, 09 Jul 2020 17:48:13 GMT

Great project.

Now I want one.

DAB

RE: Homemade High resolution X-Ray scanner !

Fred27 — Thu, 09 Jul 2020 12:41:27 GMT

I think I can also make out a motorbike throttle (with heated grips) and an NFC tag - (part of the antenna coil and the IC). One of the rectangular BGA chips looks like it might be DDR RAM.

RE: Homemade High resolution X-Ray scanner !

Andrew J — Thu, 09 Jul 2020 06:43:33 GMT

Amazing. I would never have thought x-rays was something to be played around with at home! Seeing inside things is always fascinating. I remember as a child, the shoe shops used to have an x-ray machine in them: you stuck your foot in at the bottom and looked through a ‘porthole’ at the top. I’ve always been incredulous that such a device was legal, and they certainly didn’t survive many more years, but perhaps it wasn’t as dangerous as may be thought. My foot hasn’t fallen off anyway. Yet.

RE: Homemade High resolution X-Ray scanner !

aspork42 — Thu, 09 Jul 2020 04:34:02 GMT

So let's see... USB Car charger, Computer mouse, BGA chip of some sort... logic analyzer probes?

RE: Homemade High resolution X-Ray scanner !

aspork42 — Thu, 09 Jul 2020 04:32:43 GMT

Nice work! That is awesome - you'll have a lot of fun with it [View:/resized-image/__size/16x16/__key/commentfiles/f7d226abd59f475c9d224a79e3f0ec07-f982b403-d5b3-49f8-8923-afe71cc72fd9/contentimage_5F00_1.png:16:16] Not many people can say that they've built their own X-Ray machines...

What is interesting is how much less radiation the newer digital machines use versus the analog machines of yester-year. Sensor technology has come a long way.

RE: Homemade High resolution X-Ray scanner !

Fred27 — Wed, 08 Jul 2020 19:35:41 GMT

That's a really great project. Thanks for sharing.

RE: Homemade High resolution X-Ray scanner !

Kilohercas — Wed, 08 Jul 2020 19:26:54 GMT

Embedded video function is just broken ! Can't link videos to Youtube [View:/resized-image/__size/16x16/__key/commentfiles/f7d226abd59f475c9d224a79e3f0ec07-f982b403-d5b3-49f8-8923-afe71cc72fd9/contentimage_5F00_4027.png:16:16]

RE: Best Cetus3D MK2 Printer in the world :)

genebren — Sat, 21 Jul 2018 20:14:30 GMT

Very nice looking and quiet machine.

Well done!

Gene

RE: Best Cetus3D MK2 Printer in the world :)

14rhb — Sat, 21 Jul 2018 19:34:09 GMT

Nice work Linas.

RE: STM32F7 is finaly here !

Kilohercas — Mon, 20 Jul 2015 06:25:38 GMT

Well, HAL libraries are just pain to work, spend more than 1 hour just to make one simple interrupt program, and i still can't figure-out why id does not want to work.
init and EXTI config is working, i get into EXTI program, but i need to cheack and clear pending bit, but i can't find correct variables to pass to that function, that is just great !

void EXTI0_IRQHandler(void)// Enable/Disable PID with Button, while link with computer is off. Computer will override this button !

{

if(HAL_NVIC_GetPendingIRQ(GPIO_PIN_0) != RESET)

{

NVIC_ClearPendingIRQ((uint32_t)0x00000001);

//HAL_NVIC_ClearPendingIRQ(EXTI_IMR_MR0);

//EXTI_ClearITPendingBit(EXTI_Line0);

}

this is simple IRQHandler program, if i generate rising edge, i go into this loop, but compiler does not like any variable that i put into HAL_NVIC_GetPendingIRQ() or /EXTI_ClearITPendingBit() function. And example for GPIO trigger does not work at all , happy days [View:/resized-image/__size/16x16/__key/commentfiles/f7d226abd59f475c9d224a79e3f0ec07-23546958-f1fa-4349-8c49-33a14647998f/contentimage_5F00_1.png:16:16]

RE: STM32F7 is finaly here !

clem57 — Sun, 19 Jul 2015 14:59:54 GMT

Here is another article New Part Day: STM32F7, An ARM Cortex-M7 | Hackaday which puts the discovery at around $50. But I will believe when I see it.

Clem

RE: STM32F7 is finaly here !

michaelkellett — Sat, 18 Jul 2015 08:23:08 GMT

Also, it looks like STM is ditching std libraries for this, and i am very not happy about it. It is completely different approach to get programs working between F1 F2 F4 F7 platforms. So for me at least it will be hard to switch to HAL libraries ( Hardware abstract layer)

One of the really grim things about the HAL is that although the names of a great many things have changed the names of some globally used structures have not (although the structure itself is changed) so you can't run the traditional library alongside the HAL [View:/resized-image/__size/16x16/__key/commentfiles/f7d226abd59f475c9d224a79e3f0ec07-23546958-f1fa-4349-8c49-33a14647998f/contentimage_5F00_2.png:16:16]

(This experience is from porting a large project written using Keil tools and ST libraries to latest versions of Keil and St support stuff. Of course the sections of code where I poke the hardware directly using no library functions work just fine. So I guess the lesson is that you pay in the end for that quick fix.

RE: STM32F7 is finaly here !

DAB — Fri, 17 Jul 2015 18:29:51 GMT

Looks like an interesting board.

DAB