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Re: What am I doing Wrong?  [SOLVED]

Hi!

The problem was solved?

Best regards.
by Fernando Garcia
Mon Apr 27, 2020 3:22 pm
 
Forum: LED light and others
Topic: What am I doing Wrong?
Replies: 9
Views: 12894

Re: TFT 5"  [SOLVED]

Hi!

Any news here?

Best regards.
by Fernando Garcia
Mon Apr 27, 2020 3:22 pm
 
Forum: Others components
Topic: TFT 5"
Replies: 7
Views: 24870

Re: TFT 5"  [SOLVED]

I'm not sure about it. The schematic seems different from PCB image.
Anyway you can try connect directly and if the backlight has low brightness so you can make the changes above.
by Fernando Garcia
Fri Feb 14, 2020 11:25 pm
 
Forum: Others components
Topic: TFT 5"
Replies: 7
Views: 24870

Re: TFT 5"  [SOLVED]

You should ask the datasheet for this seller because the backlight for this big screens normally are 5 V.
by Fernando Garcia
Fri Feb 14, 2020 1:16 pm
 
Forum: Others components
Topic: TFT 5"
Replies: 7
Views: 24870

Re: TFT 5"  [SOLVED]

Hi!

Yes, but you should make the changes explained here.

Moreover you have to edit the code to make the menu fill all the screen. All versions modified by users available on forum for 800x480 screen are outdated.

Best regards.
by Fernando Garcia
Fri Feb 14, 2020 11:17 am
 
Forum: Others components
Topic: TFT 5"
Replies: 7
Views: 24870

Re: What am I doing Wrong?  [SOLVED]

Hi!

Yes, but you can connect in breadboard side.

Best regards.
by Fernando Garcia
Sun Feb 09, 2020 12:21 pm
 
Forum: LED light and others
Topic: What am I doing Wrong?
Replies: 9
Views: 12894

Re: What am I doing Wrong?  [SOLVED]

Hi!

Welcome Ricardo!

Connect GND from Arduino to GND from 12 V power supply.

Best regards.
by Fernando Garcia
Fri Feb 07, 2020 11:06 am
 
Forum: LED light and others
Topic: What am I doing Wrong?
Replies: 9
Views: 12894

Re: Pcf8575 problem  [SOLVED]

Hi!

Glad to know!

I think everything here is solved. I'll close this topic.

If there's any other problem let me know in a new topic.

Best regards.
by Fernando Garcia
Thu Jan 30, 2020 7:54 am
 
Forum: DIY Ferduino controller
Topic: Pcf8575 problem
Replies: 69
Views: 107318

Re: Pcf8575 problem  [SOLVED]

Unfortunately PCF8575TS has only SSOP24 package available.
by Fernando Garcia
Fri Jan 17, 2020 11:39 am
 
Forum: DIY Ferduino controller
Topic: Pcf8575 problem
Replies: 69
Views: 107318

Re: Pcf8575 problem  [SOLVED]

Hi!

Glad to know. :)

The green board is a custom PCB or you bought in somewhere?

Best regards.
by Fernando Garcia
Thu Jan 16, 2020 8:15 pm
 
Forum: DIY Ferduino controller
Topic: Pcf8575 problem
Replies: 69
Views: 107318

Re: Pcf8575 problem  [SOLVED]

Don't forget to connect pin 10 (VCC) from TD62384AF to 5 V.
by Fernando Garcia
Thu Dec 26, 2019 4:11 pm
 
Forum: DIY Ferduino controller
Topic: Pcf8575 problem
Replies: 69
Views: 107318

Re: Pcf8575 problem  [SOLVED]

Hi! I told above: The solution could be bypass the ULN and change on code LOW to HIGH and HIGH to LOW. But I'm not sure if PCF can manage the current of all relays. If the circuit is working as I told above to prevent damage PCF I think that ULN could be replaced by a PNP transistor array and TD6238...
by Fernando Garcia
Thu Dec 26, 2019 9:36 am
 
Forum: DIY Ferduino controller
Topic: Pcf8575 problem
Replies: 69
Views: 107318

Re: Pcf8575 problem  [SOLVED]

You should find a module with a PCF8575TS instead PCF8575C.
Ferduino Mega and blue module has TS type. Should have some difference betweem TS and C type.

If you can't find this type can buy only the IC and replace on red module.
by Fernando Garcia
Wed Dec 25, 2019 10:31 pm
 
Forum: DIY Ferduino controller
Topic: Pcf8575 problem
Replies: 69
Views: 107318

Re: Pcf8575 problem  [SOLVED]

Hi! Merry christmas for all! For some reason this module is not working as OUTPUT just as INPUT. You can notice that relay is just turned on when a LOW command is sent. The solution could be bypass the ULN and change on code LOW to HIGH and HIGH to LOW. But I'm not sure if PCF can manage the current...
by Fernando Garcia
Wed Dec 25, 2019 2:28 pm
 
Forum: DIY Ferduino controller
Topic: Pcf8575 problem
Replies: 69
Views: 107318

Re: Pcf8575 problem  [SOLVED]

Gio, pictures and texts should be more useful. This video has bad quality (480p) and it's very short. Moreover I don't know your PCB. When the multimeter is showing negative voltage is because the polarity is inverted. You should swap probes positions. BTW, making videos in landscape is always the b...
by Fernando Garcia
Tue Dec 24, 2019 4:56 pm
 
Forum: DIY Ferduino controller
Topic: Pcf8575 problem
Replies: 69
Views: 107318

Re: Pcf8575 problem  [SOLVED]

With HIGH pins with both ULN and without it between 1-8 and GND (9) it measures 0 V Try measure the voltage directly over the IC (PCF8575) between P00 (pin 4) and GND if it has the same result the module is not working or Arduino is not communicating with PCF correctly. https://www.ferduino.com/for...
by Fernando Garcia
Tue Dec 24, 2019 2:10 pm
 
Forum: DIY Ferduino controller
Topic: Pcf8575 problem
Replies: 69
Views: 107318

Re: Pcf8575 problem  [SOLVED]

Hi! Two mistakes here. Between pins 1-8 and 5V measures 0 V I did not told to measure in this way. Basically you are measuring between 5 V and 5 V, it won't give any voltage obviously because there's no potential difference. What I told was: measure the voltage between pins 1-8 on socket and GND htt...
by Fernando Garcia
Tue Dec 24, 2019 10:31 am
 
Forum: DIY Ferduino controller
Topic: Pcf8575 problem
Replies: 69
Views: 107318

Re: Pcf8575 problem  [SOLVED]

The headers on PCF module seems poorly soldered here: https://www.ferduino.com/forum/gallery/image.php?album_id=53&image_id=579 Can you remove the ULN from socket and measure the voltage between pins 1-8 on socket and GND with PCF signal HIGH? It should be around 5 v. After can you measure the v...
by Fernando Garcia
Mon Dec 23, 2019 6:58 pm
 
Forum: DIY Ferduino controller
Topic: Pcf8575 problem
Replies: 69
Views: 107318

Re: Pcf8575 problem  [SOLVED]

ULN can't be used with HIGH level trigger relay board. But I don't think it's your case because your relay board is LOW level trigger as shown here . https://www.ferduino.com/forum/gallery/image.php?album_id=53&image_id=632 Here you told me that the relays are activated when pins 1 to 16 are con...
by Fernando Garcia
Mon Dec 23, 2019 5:31 pm
 
Forum: DIY Ferduino controller
Topic: Pcf8575 problem
Replies: 69
Views: 107318

Re: Pcf8575 problem  [SOLVED]

Hi!

if I connect the high level relay through the uln2803a it doesn't work


Gio, HIGH level relay board won't work with ULN because the signal is 0V (GND).

I have explained it here a few times. Please check this topic: https://ferduino.com/forum/viewtopic.php?f=6&t=100

Best regards.
by Fernando Garcia
Mon Dec 23, 2019 1:21 pm
 
Forum: DIY Ferduino controller
Topic: Pcf8575 problem
Replies: 69
Views: 107318

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