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@48kRAM @sydheresy It has been a long time since I used their PC software, so I don't entirely remember what it did.

I just remember doing something, getting the screenshot auto-updating, and then finding that SCPI command.

OWON's software, on the other hand, can query the screenshot, but it re-draws the waveform in a native PC UI/grid.

It's equally terrible to work with.

@48kRAM @sydheresy I don't think it is doing just the waveform data. Since that would be the PC is re-creating the scope screen, which means it would have to query the scope's entire setup to re-create the screenshot with controls and such.

The simpler solution would be for the software to use the :DISP:DATA? SCPI command to get a bitmap/screenshot instead.

James boosted

I am happy to share that the BeagleBoard.org Foundation has launched a new RISC-V dev board today: the BeagleV Ahead powered by the T-Head TH1520 SoC (4x C910 cores) beaglev-ahead.org/announce #RISCV #BeagleBoard #BeagleV

@joeycastillo walked through how Sensor Watch maximizes the perphials on a SAM L22 to eliminate the need for external ICs. (Also, TIL about the configurable logic unit—I can’t wait to play with those.) @crowdsupply oddlyspecificobjects.com/produ

“Go do it … [chip design] is no longer an enigma.” — Mohammad MK, eFabless Cofounder encourages everyone to consider designing their own chip at @crowd_supply

Attempting to talk us out of a Pick-and-Place machine, Joe (@securelyfitz) shows a successful fail of the PnP Badge at @crowdsupply

Here’s the main menu of the web interface. It’s not public yet, but you’ll get access if you buy a uSDR. ;)

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Andrew demonstrated uSDR and its associated web interface at ⁦‪@crowdsupply‬⁩ . It’s a m.2 form factor SDR. The web interface is very impressive. Check out its funding campaign: crowdsupply.com/wavelet-lab/us

At @crowdsupply , @aleksorsist updated everyone on ThunderScope. It’s a high-speed scope that strreams samples over USB-C/Gen3/2.2/Thunderbolt/WhateverItIsCalledToday. Great progress and fantastic presentation.

@48kRAM Yeah. Thing is, I even read an old comment on the tool's page about not supporting NTSC.

But because the screen was fine, I assumed it was updated.

Thankfully RJ sent me some math to prove it.

Facepalm. It's because Quertuoso calculates the values based on PAL, and I'm using an NTSC machine.

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Does anyone know if it is normal for a C64 to produce sharp notes? This should be A4 @ 440 Hz, but it is high. (All the notes are sharp.)

This is generated with an ArmSID and Qwertuoso.

James boosted

Progress on the Feather Op Amp Lab: a (low speed) analog waveform display! Same comparator circuit from last week, but now in addition to visualizing the output on an oscilloscope, we can display it on the OLED. Here we see a 1 Hz sine wave from the DAC on OA0's output pin. Then we move to channel 1 to see the square wave, which is the comparator's output. Finally, we can see how adjusting the ratio of the resistors in the ladder affects the duty cycle — both on the scope, and on the Feather!

@polpo I am not super familiar with how the converters work. But I know CCFLs take 10s to 100s of volts to work.

So if you're only seeing ~1 volt AC, either the switching frequency is much higher than your DMM can read, it isn't the hot side, or I'm misunderstanding how the backlight works.

Good chance it's the last one.

@polpo You sure you aren't measuring the (pulsed) DC side? Because that's at least one or two orders of magnitude too low for CCFL

@paulrickards Ouch! I feel your pain.

Once, a seller emailed me proudly, saying they used several inches of bubble wrap. And they did on the top.

After removing 4-5 inches of bubble wrap, I got to the computer, sitting on the back of the monitor. The monitor had a single layer of bubble wrap.

Oh. Its glass screen was facing down. But at least they set it on another single layer of bubble wrap!

I don't think people understand how gravity works.

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