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Manufacturing & Assembly / Re: Ribbon Laser Bonding on PCB
« Last post by wraper on Today at 10:38:35 am »Dunno about 5x5mm but smaller ones are easily available https://www.digikey.com/en/products/detail/harwin-inc/S70-138305045R/6211249
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Beginners / Re: Strange noise / FFT signal on scope
« Last post by DanielDaniel on Today at 10:37:54 am »I don't agree. Why should the displayed spectrum suddenly change completely if you change the frequency range only slightly? 
Further, I dug out an old (rather historic) spectrum analyzer and could not detect said strange signal component with it.
For me that shows that the FFT implementation is
At any rate, it think that the FFT results of the RTB2004 should be treated with caution.
Further, I dug out an old (rather historic) spectrum analyzer and could not detect said strange signal component with it.
For me that shows that the FFT implementation is
At any rate, it think that the FFT results of the RTB2004 should be treated with caution.
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General Technical Chat / Re: ultra sonic transducers
« Last post by eutectique on Today at 10:35:24 am »You might get some ideas from these videos:
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Microcontrollers / Re: SD Card reliability in SPI mode
« Last post by Miyuki on Today at 10:35:02 am »It seems like an implementation issue.
SD Card and Fat systems are fragile and must be written really carefully.
I have SD Card logging in one recent project, it buffers data internally and then flushes it in 5 to 10 second intervals to the card. It works fine for many weeks.
But as it does not have RTC or any date, but just a fixed value, it will totally crash if any modification is done to the files or even when they are simply deleted.
It uses FatFs library and when this happens it results in total garbage on the card.
SD Card and Fat systems are fragile and must be written really carefully.
I have SD Card logging in one recent project, it buffers data internally and then flushes it in 5 to 10 second intervals to the card. It works fine for many weeks.
But as it does not have RTC or any date, but just a fixed value, it will totally crash if any modification is done to the files or even when they are simply deleted.
It uses FatFs library and when this happens it results in total garbage on the card.
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Projects, Designs, and Technical Stuff / Re: No interrupt from AS6501...
« Last post by mino-fm on Today at 10:32:06 am »0xC0 ; CFG2: common & blockwise read
This is for LVDS output you don't use.
Let me show you an init sequence for both channels without PIN_ENA_RSTIDX.
const uint8_t AS6501_init_tab[] = {
0x15, // stop-A, stop-B und ext. REFCLK einschalten
0x85, // stop-A und stop-B auswerten, 1x Auswertung
0x00, // LVDS nicht aktiv
(uint8_t)(REFCLK_AUFLOESUNG), // LSB
(uint8_t)(REFCLK_AUFLOESUNG >> 8 ), // MSB-1
(uint8_t)(REFCLK_AUFLOESUNG >> 16), // MSB
0x00, // LVDS nicht aktiv
0x00, // dto.
0xa1, // interne Konstanten
0x13,
0x00,
0x0a,
0xcc,
0xcc,
0xf1,
0x7d, // bis hierhin
0x04 // CMOS-Pegel Eingänge
};
You always have to read out each FIFO to enable INTERRUPT again. They should be cleared after init.
This is for LVDS output you don't use.
Let me show you an init sequence for both channels without PIN_ENA_RSTIDX.
const uint8_t AS6501_init_tab[] = {
0x15, // stop-A, stop-B und ext. REFCLK einschalten
0x85, // stop-A und stop-B auswerten, 1x Auswertung
0x00, // LVDS nicht aktiv
(uint8_t)(REFCLK_AUFLOESUNG), // LSB
(uint8_t)(REFCLK_AUFLOESUNG >> 8 ), // MSB-1
(uint8_t)(REFCLK_AUFLOESUNG >> 16), // MSB
0x00, // LVDS nicht aktiv
0x00, // dto.
0xa1, // interne Konstanten
0x13,
0x00,
0x0a,
0xcc,
0xcc,
0xf1,
0x7d, // bis hierhin
0x04 // CMOS-Pegel Eingänge
};
You always have to read out each FIFO to enable INTERRUPT again. They should be cleared after init.
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Manufacturing & Assembly / Re: Ribbon Laser Bonding on PCB
« Last post by Kean on Today at 10:25:18 am »I'm guessing these are too small... or as you say, not flat.
https://www.keyelco.com/category.cfm/Test-Points-Tips-Probes-Clips/SMT-PCB-Jumpers/p/518/id/1206
https://www.keyelco.com/userAssets/file/M70p60.pdf
The largest seem to be 2.0x2.54mm, 1.7x3.0mm, or 1.8x5.5mm on top surface. Maybe they could make something custom one for you.
https://www.keyelco.com/category.cfm/Test-Points-Tips-Probes-Clips/SMT-PCB-Jumpers/p/518/id/1206
https://www.keyelco.com/userAssets/file/M70p60.pdf
The largest seem to be 2.0x2.54mm, 1.7x3.0mm, or 1.8x5.5mm on top surface. Maybe they could make something custom one for you.
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Projects, Designs, and Technical Stuff / Re: more modern version of tl494?
« Last post by coromonadalix on Today at 10:18:33 am »wide input voltage of ?? current ?? you miss some vital point ....
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Repair / Re: SORENSEN XPF60-20SP service problem
« Last post by coromonadalix on Today at 10:15:22 am »http://www.ko4bb.com/getsimple/index.php?id=manuals may have the xpf series 
?
put xantrex in the search box
?put xantrex in the search box
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Buy/Sell/Wanted / Re: LFS I want to buy a Fluke 9100
« Last post by coromonadalix on Today at 10:14:00 am »better specify the letter who goes after 9100
calibrator / oven etc ... on another thread just writing 9100 bring confusion
calibrator / oven etc ... on another thread just writing 9100 bring confusion
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Buy/Sell/Wanted / Re: Fluke 9100 Display....
« Last post by coromonadalix on Today at 10:12:22 am »loll i think