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In Model Creator / Documentation:

Maarten Baert

Administrator

Comment #1: Fri, 3 Aug 2018, 22:10 (GMT+1, DST)

Quote


Quote: Bluepixel

Hey there, pls read the full comment before clicking away, im begging you that you can maybe make an gml to 3d model or make it so that you can export to 3d models in model creato because i really want to have my 3d model in blender or any other 3d engine :/ thanks, -Blue

You can already do this with Game Maker. Just run the GML code and have Game Maker save the model with d3d_model_save. You can then open it with Model Creator.

In Model Creator / Documentation:

Bluepixel

Comment #2: Tue, 31 Jul 2018, 18:08 (GMT+1, DST)

Quote


Hey there, pls read the full comment before clicking away, im begging you that you can maybe make an gml to 3d model or make it so that you can export to 3d models in model creato because i really want to have my 3d model in blender or any other 3d engine :/ thanks, -Blue

In Quadcopters / Polarization:

Maarten Baert

Administrator

Comment #3: Thu, 26 Jul 2018, 19:00 (GMT+1, DST)

Quote


Quote: Dcara55135

Here is an interesting observation I do not understand. I have 2 RHCP patch antennas.

1) I point the 2 antennas at each other (stright in line boresights) with one as Tx and one as Rx (1600 MHz). I observe only freespace path loss of the correct value for the distance (5 ft). I actually expected some rejection due to crosspol (maybe 20 dB?) thinking if it received RHCP it would transmit LHCP.

2) Believing now that the observation implied a Rx RHCP antenna would also Tx RHCP I moved the Tx antenna next to the Rx antenna (2ft away) facing the same direction as the Rx antenna (parallel boresights) so now the transmitted wave would be rotating opposite of the previous test and I would see the cross pol and beam width rejection. Alas it was not the case. In short, with the Tx antenna in this position facing the same direction as the Rx was facing showed 10dB more signal at the Rx antenna than when I turned the Tx antenna 180 degrees facing the opposite direction.

Do you have an idea of what is happening?

A RHCP antenna will always either produce or receive RHCP waves, regardless of whether you use it as a transmitter or a receiver. It's a bit counter-intuitive, but you can think of a receiving antenna as a time-reversed transmitting antenna: if you could make a video of the electromagnetic fields, a receiving antenna would look very similar to a transmitting antenna except the video is played backwards. So a clockwise rotation at the TX side becomes counter-clockwise on the RX side, which cancels out the fact that the antennas are facing in opposite directions (i.e. towards each other), so the direction of rotation ends up being the same on both sides. So in short, both the TX and RX side should use the same antenna polarization (LHCP or RHCP).

I don't fully understand the description of the second test - it sounds like the patch antennas are no longer facing each other. In that case you won't get much of a signal because you are outside the main beam of the antenna.

Last modified: Thu, 26 Jul 2018, 19:09 (GMT+1, DST)

In Quadcopters / Polarization:

Dcara55135

Comment #4: Thu, 19 Jul 2018, 1:24 (GMT+1, DST)

Quote


Here is an interesting observation I do not understand. I have 2 RHCP patch antennas.

1) I point the 2 antennas at each other (stright in line boresights) with one as Tx and one as Rx (1600 MHz). I observe only freespace path loss of the correct value for the distance (5 ft). I actually expected some rejection due to crosspol (maybe 20 dB?) thinking if it received RHCP it would transmit LHCP.

2) Believing now that the observation implied a Rx RHCP antenna would also Tx RHCP I moved the Tx antenna next to the Rx antenna (2ft away) facing the same direction as the Rx antenna (parallel boresights) so now the transmitted wave would be rotating opposite of the previous test and I would see the cross pol and beam width rejection. Alas it was not the case. In short, with the Tx antenna in this position facing the same direction as the Rx was facing showed 10dB more signal at the Rx antenna than when I turned the Tx antenna 180 degrees facing the opposite direction.

Do you have an idea of what is happening?

Last modified: Thu, 26 Jul 2018, 19:00 (GMT+1, DST)

In Quadcopters / Pagoda antenna:

Udon

Comment #5: Fri, 13 Jul 2018, 11:21 (GMT+1, DST)

Quote


Hello
Pagoda antenna and Triple Feed Patch antenna
Which manufacturer is the best?

In SimpleScreenRecorder / Troubleshooting:

Jorge

Comment #6: Fri, 29 Jun 2018, 21:34 (GMT+1, DST)

Quote


Quote: Jorge

Hi. I want to record video conferences. However I cannot record both my voice and the voice of the other person. When I select source `Headset H390 Analog Mono`, it only records my voice. When I select source `Monitor of Headset H390 Analog Stereo`, it only records the other person's voice. Since this is probably a common use case, could you provide easy instructions for it?

Hi. I solved it myself through the help of the following easy tutorial:
https://www.linux.com/learn/weekend-project-record-skype-calls-and-other-apps-linux

Regards

In SimpleScreenRecorder / Troubleshooting:

Jorge

Comment #7: Tue, 26 Jun 2018, 23:31 (GMT+1, DST)

Quote


Hi. I want to record video conferences. However I cannot record both my voice and the voice of the other person. When I select source `Headset H390 Analog Mono`, it only records my voice. When I select source `Monitor of Headset H390 Analog Stereo`, it only records the other person's voice. Since this is probably a common use case, could you provide easy instructions for it?

In Quadcopters / Triple Feed Patch Array antenna:

Maarten Baert

Administrator

Comment #8: Sun, 24 Jun 2018, 21:13 (GMT+1, DST)

Quote


Quote: Androot

Hello

I have qustion about part 2 (bigger one).
I opened it in Kicad Gerbviewer and found that bottom copper layer has additional ground plane. On photos there isn't. It's some improvement or error in Gerber file?

Best regards
Piotr

This is explained below the photo:

Quote

The photos above show a prototype, the latest design files have an additional copper plane on the back. This copper plane doesn't have any function, but it helps to balance the amount of copper on the top and bottom side of the PCB, which should reduce warping.

In Quadcopters / Triple Feed Patch Array antenna:

Androot

Comment #9: Fri, 22 Jun 2018, 10:02 (GMT+1, DST)

Quote


Hello

I have qustion about part 2 (bigger one).
I opened it in Kicad Gerbviewer and found that bottom copper layer has additional ground plane. On photos there isn't. It's some improvement or error in Gerber file?

Best regards
Piotr

Last modified: Fri, 22 Jun 2018, 10:02 (GMT+1, DST)

In Quadcopters / Triple Feed Patch Array antenna:

Actuna

Comment #10: Thu, 21 Jun 2018, 20:25 (GMT+1, DST)

Quote


Hello ...

I would like to inform you about the production and sale of the Triple Feed Patch Array (hybrid):

Manufacturer: ACTUNA

URL: https://actuna.com/Antenna-Triple-Feed-Patch-Array-TFP-A-p22197

Price: 26,32 $

- hybrid
- SMA (female)

Notes: Each antenna is measured individually and gets its own parameters tab. Optional SMA and RP-SMA - Includes semi-rigid coax (SMA male – SMA male or SMA male - RP-SMA female). Fast delivery in the EU (3-10 days).

Contacts: actuna@actuna.pl

PS:

We produced a modified version of the Triple Feed Patch (hybrid) antenna - a diameter of 45mm. We are now finishing the tests of this antenna, the results are positive.

In Quadcopters / Pagoda antenna:

Maarten Baert

Administrator

Comment #11: Sat, 16 Jun 2018, 16:58 (GMT+1, DST)

Quote


Quote: Hotmultimedia

Was the antenna designed with that 3D printed plastic cover? How does it affect it's operation?

I don't have anechoic chamber measurements of the antenna with cover, but you can see some VNA measurements here.

In Quadcopters / Antennas:

Maarten Baert

Administrator

Comment #12: Sat, 16 Jun 2018, 16:56 (GMT+1, DST)

Quote


Quote: Hotmultimedia

Hi. Can you recommend an antenna simulation software?

I'm wondering if it would be possible to design an atleast somewhat operating 5.8GHz antenna that would be embedded within a wooden block.

I use HFSS. CST is also good. Both are too expensive for hobbyists though, I can use it through my university.

You can't really embed a 5.8GHz antenna in a wooden block, the absorption of the wood is way too high.

In Quadcopters / Pagoda antenna:

Hotmultimedia

Comment #13: Fri, 15 Jun 2018, 9:26 (GMT+1, DST)

Quote


Was the antenna designed with that 3D printed plastic cover? How does it affect it's operation?

In Quadcopters / Antennas:

Hotmultimedia

Comment #14: Wed, 13 Jun 2018, 22:29 (GMT+1, DST)

Quote


Hi. Can you recommend an antenna simulation software?

I'm wondering if it would be possible to design an atleast somewhat operating 5.8GHz antenna that would be embedded within a wooden block.

In Quadcopters / Triple Feed Patch antenna:

Maarten Baert

Administrator

Comment #15: Fri, 1 Jun 2018, 1:43 (GMT+1, DST)

Quote


Quote: Prouser27

Hello Maarten!

On the vertical cross-section image it looks like as the LHCP is more "stronger" as the RHCP polarization? The LHCP polarization looks like an big signal bubble in on direction and the RHCP much smaller.

Or are the two polarizations equally strong?

The images show the radiation pattern when a signal is applied to the LHCP port and the RHCP port has only a 50 ohm terminator connected to it. It's not supposed to transmit any RHCP radiation. If you swap the signal to the other port, LHCP and RHCP will be swapped as well. So LHCP and RHCP are equally strong, at least when using the right port.

In ExtremePhysics / Collision filtering:

Maarten Baert

Administrator

Comment #16: Fri, 1 Jun 2018, 1:41 (GMT+1, DST)

Quote


Quote: 7upnamk

Hi maarten. I never work with bitwise operation before so that i've been confused so much with your destructible terrain example. In the terrainblock_init script, i cant understand this:

mask = (1<<(size+1))|1;

why do you add

|1

into this? I've tried to comment like this

mask = (1<<(size+1))//|1;

and it still worked.
Sorry about my bad english
Thanks so much for your effecient extension!

If I recall correctly I did that because I use the least significant bit for collisions with regular objects. However ExtremePhysics is set up in such a way that if at least one of the two objects has a collision mask bit in common with the other, a collision will happen, so removing that bit does nothing in this case. However if you removed it as well for the regular objects, they would no longer collide with the terrain.

The (1<<(size+1)) part is used to quickly find all terrain boxes of a certain size.

In Quadcopters / Triple Feed Patch antenna:

Prouser27

Comment #17: Wed, 30 May 2018, 14:48 (GMT+1, DST)

Quote


Hello Maarten!

On the vertical cross-section image it looks like as the LHCP is more "stronger" as the RHCP polarization? The LHCP polarization looks like an big signal bubble in on direction and the RHCP much smaller.

Or are the two polarizations equally strong?

Last modified: Wed, 30 May 2018, 14:50 (GMT+1, DST)

In ExtremePhysics / Collision filtering:

7upnamk

Comment #18: Wed, 30 May 2018, 6:09 (GMT+1, DST)

Quote


Hi maarten. I never work with bitwise operation before so that i've been confused so much with your destructible terrain example. In the terrainblock_init script, i cant understand this:

mask = (1<<(size+1))|1;

why do you add

|1

into this? I've tried to comment like this

mask = (1<<(size+1))//|1;

and it still worked.
Sorry about my bad english
Thanks so much for your effecient extension!

In SimpleScreenRecorder / Troubleshooting:

Krish

Comment #19: Mon, 28 May 2018, 18:11 (GMT+1, DST)

Quote


Quote: Maarten Baert
Quote: Krish

Thank you for this very useful program.

I am trying to record some videos for uploading to Vimeo. I am using a screen capture area of 854 x 480. Whether I use the H264 codec and a CRF of 16 or 18 and the ultrafast preset or the libx264 codec with a 5000 kbit/s bit rate my final video does not have a video bit rate of more than 70 or 80 kbit/s. Vimeo complains that my video is of low quality.

What is it that I am doing wrong?

Thanks.

If the video looks good to you, then ignore the warnings. Some types of video don't need a high bit rate (e.g. mostly static images, like many video tutorials). If you think it looks bad, please send me the video file so I can take a look.

The videos do not look bad. These are videos of math and physics problem solving as in Khan academy. I think I shall take your advice. Thanks.

In Quadcopters / Pagoda antenna:

Hugo

Comment #20: Sun, 27 May 2018, 22:21 (GMT+1, DST)

Quote


Quote: Maarten Baert
Quote: Unknown

Hi,

Any news about 2.4Ghz design?

I haven't had time for it yet. It's not a high priority for me because I suspect that very few people will use it.

For 2.4 check:

https://www.truerc.ca/shop/antennas/2-4ghz/singularity-24

Not same design, smaller but norrower bandwidth, not that you need more than what’s legal anyway.

In SimpleScreenRecorder / Troubleshooting:

Maarten Baert

Administrator

Comment #21: Sun, 27 May 2018, 19:38 (GMT+1, DST)

Quote


Quote: Krish

Thank you for this very useful program.

I am trying to record some videos for uploading to Vimeo. I am using a screen capture area of 854 x 480. Whether I use the H264 codec and a CRF of 16 or 18 and the ultrafast preset or the libx264 codec with a 5000 kbit/s bit rate my final video does not have a video bit rate of more than 70 or 80 kbit/s. Vimeo complains that my video is of low quality.

What is it that I am doing wrong?

Thanks.

If the video looks good to you, then ignore the warnings. Some types of video don't need a high bit rate (e.g. mostly static images, like many video tutorials). If you think it looks bad, please send me the video file so I can take a look.

In Quadcopters / Antennas:

Maarten Baert

Administrator

Comment #22: Sun, 27 May 2018, 19:35 (GMT+1, DST)

Quote


Quote: W2hro

Have you designed an RHCP / LHCP antenna for L-Band frequency?

This patch antenna design would be useful as a feed for L-band satellite dishes.

Contact info - w2hro.fn20@gmail.com

Quote: Efeksk

Hi maarten.
I congratulate you on your work.
You're doing a pretty good job.
Acama Do you have an antenna development plan for 1.2 GHz and 2.4 GHz frequencies?

I'm not currently working on antennas for lower frequencies due to time limitations, but I may do so in the future.

In SimpleScreenRecorder / Troubleshooting:

Krish

Comment #23: Sat, 26 May 2018, 19:24 (GMT+1, DST)

Quote


Thank you for this very useful program.

I am trying to record some videos for uploading to Vimeo. I am using a screen capture area of 854 x 480. Whether I use the H264 codec and a CRF of 16 or 18 and the ultrafast preset or the libx264 codec with a 5000 kbit/s bit rate my final video does not have a video bit rate of more than 70 or 80 kbit/s. Vimeo complains that my video is of low quality.

What is it that I am doing wrong?

Thanks.

In Quadcopters / Antennas:

Efeksk

Comment #24: Wed, 23 May 2018, 9:31 (GMT+1, DST)

Quote


Hi maarten.
I congratulate you on your work.
You're doing a pretty good job.
Acama Do you have an antenna development plan for 1.2 GHz and 2.4 GHz frequencies?

In Quadcopters / Pagoda antenna:

Maarten Baert

Administrator

Comment #25: Mon, 21 May 2018, 15:22 (GMT+1, DST)

Quote


Quote: Unknown

Hi,

Any news about 2.4Ghz design?

I haven't had time for it yet. It's not a high priority for me because I suspect that very few people will use it.

In Quadcopters / Pagoda antenna:

Unknown

Comment #26: Sat, 19 May 2018, 19:50 (GMT+1, DST)

Quote


Hi,

Any news about 2.4Ghz design?

In SimpleScreenRecorder / Troubleshooting:

Maarten Baert

Administrator

Comment #27: Thu, 17 May 2018, 21:56 (GMT+1, DST)

Quote


Quote: Steveebey73701

Running F28 Fedora Linux 64Bit. Installed distro copy of SSR, if I select AAC as audio codec for mp4 I can not record, and the system reports no audo codec. MP3 records audio just fine. uninstalled distro version, downloaded git version, made sure aac libs existed and all other dependencies, compiled with your simple build script, ran from gui, aac still fails, ran from command line aac fails, mp3 audio works.

If you run ffmpeg from the command line, are you able to generate AAC files?

In Quadcopters / Pagoda antenna:

Maarten Baert

Administrator

Comment #28: Thu, 17 May 2018, 21:54 (GMT+1, DST)

Quote


Quote: Illia

Hi, Maarten!
I want to make a "stubby"-like pagoda, and I wonder - will it perform worse if I remove lower small disc and solder the connector right under mid disc of the antenna?

Yes. This has been asked many times :).

In Quadcopters / Triple Feed Patch Array antenna:

Maarten Baert

Administrator

Comment #29: Thu, 17 May 2018, 21:13 (GMT+1, DST)

Quote


Quote: Tagada73

Hi Mr Baert what diameter of your new feed patches? Thanks in advance

The diameter is 15 cm.

Quote: Blackbox

Hi, thanks for the numerous designs you keep publishing. They really bring the cost of directional antennas down for hobbyists. I have a few questions though.
Will the antenna perform significantly worse if the through holes are plated ? I forgot to mention it when I ordered pcbs for the previous triple feed patch design.
Also, does the copper wire diameter really matters if you still manage to have the right distance between the 2 antenna parts ?
TIP for hobbyist : Use JLCPCB for your first order, it's the cheaper.

The holes have no significant impact on the performance, you can change them or even remove them entirely. If you don't mention that they are unplated, two things can happen: either the manufacturer tries to plate them anyway (very unlikely because there is no copper on the top or bottom), or the manufacturer ignores the file with unplated holes (so there will be no mounting holes).

The copper wire diameter is important, you should buy 1mm wire or something very close to it if you don't have it already. Don't try it with e.g. 0.5mm, this will most likely create a significant shift in center frequency and affect the matching between the feed network and the antenna (which can affect the axial ratio).

In SimpleScreenRecorder / Troubleshooting:

Steveebey73701

Comment #30: Thu, 17 May 2018, 19:06 (GMT+1, DST)

Quote


Running F28 Fedora Linux 64Bit. Installed distro copy of SSR, if I select AAC as audio codec for mp4 I can not record, and the system reports no audo codec. MP3 records audio just fine. uninstalled distro version, downloaded git version, made sure aac libs existed and all other dependencies, compiled with your simple build script, ran from gui, aac still fails, ran from command line aac fails, mp3 audio works.