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by rexnanet
Fri Mar 24, 2017 2:53 pm
Forum: Projects
Topic: $10 O-Scope revisited
Replies: 629
Views: 34668

Re: $10 O-Scope revisited

I made small breadboard for it ( knife cut ! :lol: ). DLO138-SPI_Display_Preamp.JPG I have made a new video (with better Sinus over divider (10k/3.3k) and changing gain of MCP6S91 between 1 ... 8). https://www.youtube.com/watch?v=GRtzcdL9PgA&feature=em-upload_owner It's the power supply on the ...
by rexnanet
Fri Mar 24, 2017 2:45 pm
Forum: Projects
Topic: $10 O-Scope revisited
Replies: 629
Views: 34668

Re: $10 O-Scope revisited

HELP :!: :!: :!: :!: I try to realize this oscilloscope. I use the STM32-O-Scope-byRex code. Fails to load code into the STM32.. I get the following error message, which I can not solve. :?: Perhaps you can provide links to the correct libraries, or upload into a single archive. ;) Thanks https://d...
by rexnanet
Fri Mar 24, 2017 11:14 am
Forum: Projects
Topic: $10 O-Scope revisited
Replies: 629
Views: 34668

Re: $10 O-Scope revisited

Looks very good! The noise levels seem ok. Are you using a breadboard or have you made a board for it? The need for shielding might indicate some ground problems or too much attenuation+gain... Now you could make some measures to see if the voltage levels match the real signal :) IMO you could also ...
by rexnanet
Thu Mar 23, 2017 5:18 pm
Forum: Projects
Topic: $10 O-Scope revisited
Replies: 629
Views: 34668

Re: $10 O-Scope revisited

Well done!

I've seen the video before the post :) It's running great. except near the end :) what happened?
by rexnanet
Thu Mar 23, 2017 12:07 pm
Forum: Projects
Topic: $10 O-Scope revisited
Replies: 629
Views: 34668

Re: $10 O-Scope revisited

Hi mausi_mick,

Why are you using negative supply rails?
MCP6S is only positive supply if I recall. I'm going to add VCC/2 on an input amplifier so that it can accept negative voltage and be already in the ADC voltage range.
Might have a few drawbacks but it's simpler in other aspects.
by rexnanet
Wed Mar 22, 2017 4:10 pm
Forum: Hardware
Topic: Ultrasonic distance sensor
Replies: 7
Views: 1407

Re: Ultrasonic distance sensor

There's now a 3.3V version of the module. It's named "HC-SR04P".

https://www.aliexpress.com/item/HC-SR04 ... 59780.html
by rexnanet
Mon Mar 20, 2017 10:50 am
Forum: Projects
Topic: $10 O-Scope revisited
Replies: 629
Views: 34668

Re: $10 O-Scope revisited

Nop, didn't miss it, no schematic but... Its a bit self explained in the .ino file. MCP6S92_A1_CS PA9 MCP6S92_A1_DIN PB10 MCP6S92_A1_CLK PB11 MCP6S92_A2_CS PA10 MCP6S92_A2_DIN PB10 MCP6S92_A2_CLK PB11 Others are +3.3V, GND and Vin and Vout... Meanwhile, I'll try to draw something.
by rexnanet
Mon Mar 20, 2017 9:23 am
Forum: Projects
Topic: $10 O-Scope revisited
Replies: 629
Views: 34668

Re: $10 O-Scope revisited

The code was working fine after all :D The issue was that it was jumping to "normal" trigger and it stopped (it's a bug because it should run because it had valid trigger but... :) ) If you go to the trigger menu and select "auto" it runs ok. I've tested the 2 MCP6S in series and...
by rexnanet
Mon Mar 20, 2017 8:25 am
Forum: Builds and Announcements
Topic: Did minor fix to stop clash of Servo libraries
Replies: 2
Views: 199

Re: Did minor fix to stop clash of Servo libraries

I don't know if there's a problem with the "pill" I used but I could only get it to work on PWM3 pins (only tested on PA6 from PWM3)... I had other things connected but doesn't seem to be the problem(TFT and MCP6S's...). BTW, what do you mean by "clash"? :D is it equal to "c...
by rexnanet
Fri Mar 17, 2017 10:23 am
Forum: Builds and Announcements
Topic: Did minor fix to stop clash of Servo libraries
Replies: 2
Views: 199

Re: Did minor fix to stop clash of Servo libraries

I want to test some servo's I bought and I want to get some code for my blue pills. Where can I get "STM version" of the servo library? I can test this and give you the feedback. Edit: ups... posted before searching :) found it... ".../Arduino/hardware/STM/STM32F1/libraries/Servo"...

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