วีดีโอ

Thanks for the review.any idea how deep you can put the airstones? How long have you had this system you recommend? Thanks again.

I´ve just bought this one. Very good job, Many thanks from Argentina

Can you say what is the software and acquisition board you used in the experiment?

Keep going bro we like content like this especially the RF amplifier

Hello, first thank for the video. I'm having problems with the magnetometer, it doesnt connect. i tested your code and this is the output i received: I (310) spi_flash: detected chip: generic I (313) spi_flash: flash io: dio W (317) i2c: This driver is an old driver, please migrate your application code to adapt `driver/i2c_master.h` I (329) main_task: Started on CPU0 I (339) main_task: Calling app_main() Failed to set_accel_range: ESP_FAIL Failed to set_gyro_range: ESP_FAIL E (339) SensorTask: Failed to reset AK8963: ESP_FAIL I (339) SensorTask: ==================================================================================== I (349) SensorTask: Orient the sensor device with the x-y plane level and keep it still for calibration. I (369) SensorTask: ==================================================================================== Calibration samples remaining: 10 I (10379) SensorTask: ======================================================================================= I (10379) SensorTask: Rotate the sensor device through its full range of motion for magnetometer calibration. I (10389) SensorTask: ======================================================================================= Raw MAG Data - mx: 1, my: 0, mz: -5100 Total samples: 1, Segment (5,6) count: 1Raw MAG Data - mx: 1, my: 0, mz: -5100 Total samples: 2, Segment (5,6) count: 2Raw MAG Data - mx: 1, my: 0, mz: -5100 Total samples: 3, Segment (5,6) count: 3Raw MAG Data - mx: 1, my: 0, mz: -5100 I’m unsure if the chip I purchased might be defective or if there's something I'm missing in the setup. I've already tested with three different libraries, and while I can detect the 0x68 address during a scan, the AK8963 does not seem to respond. Could you please provide any insights or suggestions on how to resolve it? Thank you in advance for your help!

it's possible switch protocol from NMEA to ublox ?

The Rigol DHO900 AFG has a 100ppm accuracy according to its data sheet. Thus, the frequency error you are getting is within the specifications.

Thanks for sharing. That’s very useful. I hope rigol can release firmware which can control, set and tune the signal generator. It isn’t very accurate.

I was looking at the pinout of the 50W connector and there are two reference voltages (one for each block of eight inputs). These are not used by the probe you're testing as it uses fixed logic levels. So, on the Rigol probes, do you know if it supports programmable levels?

Hey, can check with your TinySA if the HackRF puts off signal/noise when turned on between the 350mHz-900mHz range? Easier to see if using the waterfall display of course.

I got a desoldering iron. It’s basically a soldering iron sucker hybrid and makes it way easier.

This is probably the best explination out there, the animation is amazing too! I never even knew you can do things like that in matplotlib. Thank you!

O AD584jk é bom e muito preciso,E COMO MONTAR NO PLOTBOARD ?

Hey buddy I need a tip on lowering the action on this thing turning the spoke wheel isn't just helping. Do I need to lower the screws on the bridge too ?

Very interesting! thanks for that! What is the device the Freq Counter is connected to above the GPSD?

Which AD584 model is more accurate?

Did your audio crackle and pop a lot? I'm building a bluetooth speaker with same chips.

Great video. I appreciate that you set up just a simple circuit and walked through what each part does. I need to level shift 0v-3.3v signal to -10v-10v, so i assume i can use pretty much the same circuit, but pass in some amount of -v instead of the 2v in your ecample.

Newbie here... I'd like to learn more about your voltage divider and how you were able to get a positive and negative voltage to drive the op amp. Do you have a schematic for it - or point me in the right direction.

really the only thing i do see is that there is only 1 pair of usb2 connections active( D+ D- ). so these cables are directional if the device is not designed properly (pretty normal really). the only thing that i really could possibly see wrong with them is if they are capable of meeting the stamped spec listed on them, and if they didnt cheap out on the wire for the power

Do it test power capabilities and bandwidth?

Wow. I have the same tester and, same as you, I have never seen so many lights on.

Thank you for the brief, to the point video. I just ordered the spring latches.

How can you tell which of the two MAX98357s is the left channel?

Hello guy, my dho924s produces a square wave with an annoying oscillation of 60 ns, both after the rising edge and after the falling edge. Does this also happen on your DHO924s?

Hello, thank for the video it is interesting! Why are the values of accelerations neither 0 nor ≈9.81(on Z) when your IMU is not moving ?

i have a slightly different variation. once i put any solder on it at all the caps do not go back on. even 24 awg wire and minimum solder i cant get the cap back on without bending it to hell. I ruined three of these already

attach the adapter to a 1-2m USB cable

Merci

Did you have to buy license for the digital signal option or is coming standard with the scope?

Can I use resistance calibration using an analog multimeter?

tinysa ultra spec says that the sine signal level is +-2db across the lower freq range. 4db delta means you have Vpp uncertainty of about 50% Could be 1V at one freq and could be 0.63V at another. You try to measure 30% drop in amplitude while you have 50% error.

Nice video, answered my question on how to connect, thanks a lot for sharing!

A channel by the name of @TheHWcave showed that the jitter was caused when the PPS frequency is not a divisor of the internal oscillator frequency which should be 48 MHz if I’m not mistaken. This is the video: th-cam.com/video/M6SmdqMA-Dg/w-d-xo.html

evvblog said the maximum frequency it can reach based on the builtin chip can be 800Mhz (no doute). Have you tried? What’s the result?

OK, I did some testing using an LEA-M8T-0-10 module with f=12MHz, 50% duty cycle, lock to GNSS, and I can't see any jitter - it's a clean 12MHz square wave. I also measured it on a counter in stats mode (HP53131A, Ref from a FE5680 Rb standard) over 100 cycles with a 1s gate time and got: Fmin = 11,999,999.975Hz, Fmax = 12,000,000.039Hz - high time was min = 40.7ns max = 43.2ns - since 1 tick of the 48MHz clock is about 20ns this is likely just noise from my quickly hooked up test setup.

An inexpensive GPSDO will use the 1PPS via a FLL to control an OCXO at a typical frequency of 10 MHz. They're jitter-free, and at the standard 'lab' reference frequency of 10MHz. Worth every penny of their $100 price class. Only significant drawback is that the GPSDO takes a lot more power than just the GPS module.

The internal clock should be 48MHz (not that it matters much since it's 2x24) and apparently you get the cleanest signal if you divide that by power of 2 divider. There was an evaluation of the output signal on some Russian site but can't find it now.

Got the same results with my Rigol DHO804 (hacked to 100MHz). The real bandwidth was roughly 150MHz, which is also what the default probes are rated for. The maximum rise time I got with a NanoVNA H4 was 2.3ns, which is in accordance to the bandwidth test I did. My biggest problem with the DHO804 is the lack of dots display, vector display can look really ugly sometimes and it's a shame when they've got a display that can show multiple colour intensities at the same time.

Does the uBlox provide a digital signal that tells that the frequency is GPS synchronized and not just a local XO ? or one has to query the status over the serial interface for that?

I have found it difficult to remove enough solder with the sucker to actually break the mechanical attachment between parts and a board. I had better success with the technique of adding solder and using a copper wire to keep the whole set of pins hot.

6:07 RE THE OVERSHOOT Hi mate, i was gonna say, ARE YOU USING YOUR SCOPE PROBES Are they on 10x - if YES.. Good Are you using the positive on the conductor - if YES... Good WAIT FOR IT... Are you using THE GROUND CLIP- if YES....... BAD Try this as a first troubleshooting method to determine i the overshoot or inductive ringing is the circuit or your probes There is a small springy wire attachment that comes with scope probes. Disconnect your GROUND Lead and take off the Positive Hook part to reveal the raw tip. Attack the negative springy thing THEN TEST IT AGAIN You'll likely find that a lot of that overshoot was as a result of your scope probe's Ground Lead. let me know

1:43 i was just gonna say don't use Delay (that will cause blocking) use vTaskDelay() classic issue on Arduino, You start on delay, it doesn't work , so you turn to millis, then that doesn't work and you're stuck solution...... ESP32, FreeRTOS and vTaskDelay

as you said "IT'S A START" and... GODDAMMIT i am going to continue this I WANT TO BE ABLE TO DO THE FOLLOWING WAVEFORMS Sine Square Rectangle (with Configurable Duty Cycle) DC Pulse Triangle Sawtooth Noise I want all of them (but let's start with just Sine , Square and Rectangle) to have a Max Frequency of 500MHz. Adjustable manually via a P.O.T. I want all of them to have Amplitude Adjustment manually via a P.O.T. I want all of them to have PHASE OFFSET Ability (Where applicable) Adjustable manually via a P.O.T. I want to have DUTY CYCLE Adjustable manually via a P.O.T. I want to have Modulations, AM, FM, FSK, PSK Adjustable manually via a P.O.T. I think this might be interesting to work on.

10:40 You should know that WHEN USING ESP32, include Arduino.h Library is NOT necessary as you are not using Arduino, you are using FreeRTOS

What scope you used?

Is it possible to generate cosine in gigahertz? Is it possible to make an RF PLL oscillator in gigahertz?

'Promo sm'

I bought the Gold PCB version with short 30cm grey ribbon cable. I also purchased a longer 50cm rainbow ribbon cable from AliExpress. Nice litte logic analyzer board.