HB100 radar!

[jgu1]

Hi!

Is it possible and not to difficult to create a component in FC for this radar so it is possible to measure the speed. Similar to this:

https://stoppi-homemade-physics.de/dopplerradar/

I can send one device for test.

Thank´s in advance.

Jorgen

[BenR]

Hi Jorgen,

That looks very interesting. I know Medelec has just been working on a frequency meter and so converting this to speed looks to be a very simple task.

Speed KM/H = Frequency / 19.49

Speed M/H = Speed KM/H * 0.621371

Making a universal component to measure frequency should be possible.

[jgu1]

Hi Ben!

Thank´s for reply. Ok so simple I will give it a go with Martin´s frequency counter. But anyway, it would be nice with a component for the HB100 too.
Maybe also be able to choose HB100 for other purposes. Example in addition to being able to measure speed, use it to detect if someone / something is approaching similar Pir sensor which could be selected in properties.

By the way, for loooong time ago you create a component for the ILI9488 display. I promised to let you know when I have test this with SPI. I have still not received the display, Ebay you know wrote to the seller today and ask......

Br regard

Jorgen

[medelec35]

Hi Jorgen.
Can you send me a flowchart that just has a one-second flasher working at the correct frequency?
I will then see if I can get the doppler radar to work for you.

[jgu1]

Hi Martin!

You are amazing . Hereby one sec flasher for a pic and an Arduino ( hope I understand you correctly) Both is tested in real world.
For the Arduino is the 98% accuracy for one second. The timer0 Prescaler rate is 1:1024 and give a frequency 61.035 hz.
The Pic16F876 is 100%

I will start create the amplifier with a LM324N today.

Hope this is ok?

Jorgen

[medelec35]

Thank you for the files, happy to help.
The reason for asking is so I know that the flowchart runs your hardware OK.
What display are you using, the generic 16x2?
I will use the 16F876.

[jgu1]

Please I2C backpack if ok with you. (easy to connect)

[medelec35]

Hi, Can you give this a try please?
The frequency input is T1CKI = pin15
I have not got your microcontroller, so unable to test on hardware first.

[jgu1]

Thank´s Martin. As you see on picture, so far so good

But pin 15 is SDA C4for the display, and I cannot remap this pin. I dare not to change something in your program, can you change the input from the doobler to another pin input, please?

***EDIT*** Of course, I change the display from channel1 to software C4 > C5 Display still work but no speed readout in display. I also try to connect my signal generator TTL not help

[medelec35]

Oh, sorry.
Pin 15 is T1CKI on the 40 pin device.
You have the 28pin device, so its pin 11 for the frequency input.

T1CKI 28pin.png (76.26 KiB) Viewed 9631 times