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by pcmanbob
Mon Jun 24, 2019 6:38 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: Water proof reliable temperature probe
Replies: 2
Views: 169

Re: Water proof reliable temperature probe

I resorted to dismantling the waterproof sensors I had and then reusing the cable and sensor tube with some known good DS18B20 TO-92 sensors, remaking the waterproof ones with my own heatsink compound and heat shrink tubing.
by pcmanbob
Mon Jun 24, 2019 6:33 pm
Forum: Beginners
Topic: RPI4 USB C Power Delivery negotiation
Replies: 3
Views: 170

Re: RPI4 USB C Power Delivery negotiation

I don't think there is any negotiation but if you watch this review from 11:20 powering with a phone charger is mentioned, but its still only 5v at 3A phone charger.
by pcmanbob
Mon Jun 24, 2019 6:16 pm
Forum: Troubleshooting
Topic: RPi 3 and TB6600 cannot control bipolar stepper motor
Replies: 11
Views: 218

Re: RPi 3 and TB6600 cannot control bipolar stepper motor

You could also try adding 3 LED's to prove the interfacing circuits are working

Image

that way you can see what inputs are being applied to the controller
by pcmanbob
Mon Jun 24, 2019 5:53 pm
Forum: Troubleshooting
Topic: RPi 3 and TB6600 cannot control bipolar stepper motor
Replies: 11
Views: 218

Re: RPi 3 and TB6600 cannot control bipolar stepper motor

I have no idea if that is the correct switch set-up you need to look at the link I posted and check for yourself that the settings are correct for the motor you are using.. So if sending a high to ENA causes the motor to become free it proves that the control circuit is correct connected as that's w...
by pcmanbob
Mon Jun 24, 2019 5:22 pm
Forum: Troubleshooting
Topic: RPi 3 and TB6600 cannot control bipolar stepper motor
Replies: 11
Views: 218

Re: RPi 3 and TB6600 cannot control bipolar stepper motor

Try leaving the ENA terminals disconnected as it should default to enabled.

Have you set up the configuration on the switches on the controller.

https://www.sainsmart.com/products/sing ... ler-tb6600
by pcmanbob
Mon Jun 24, 2019 4:44 pm
Forum: Troubleshooting
Topic: RPi 3 and TB6600 cannot control bipolar stepper motor
Replies: 11
Views: 218

Re: RPi 3 and TB6600 cannot control bipolar stepper motor

Looking at your pictures I can't see where the 5V is connected to the 3 wires that feed the control circuits that the transistors control.

You have 2 red wires and a yellow connected to the same row but no 5V supplying them.
by pcmanbob
Mon Jun 24, 2019 1:05 pm
Forum: Troubleshooting
Topic: Help with crashing RPZ(W)
Replies: 3
Views: 62

Re: Help with crashing RPZ(W)

I would suggest you should have posted the logs with your question.

use code tags to post the logs .
by pcmanbob
Mon Jun 24, 2019 10:25 am
Forum: Python
Topic: GPIO pins are not turning on in while loop
Replies: 8
Views: 169

Re: GPIO pins are not turning on in while loop

I am confused your videos clearly shows that the gpio outputs are working as you demonstrate that the voltage on the H-bridge changes and that you get a cooling affect on the Peltier..

Unless of course this is not your set-up but one you found on youtube that you are trying to copy.
by pcmanbob
Sun Jun 23, 2019 9:15 pm
Forum: Beginners
Topic: 4 AA Battery pack for Servo
Replies: 11
Views: 252

Re: 4 AA Battery pack for Servo

Have you tried measuring the battery voltage while trying to make the servo move ?
by pcmanbob
Sun Jun 23, 2019 9:09 pm
Forum: Python
Topic: GPIO pins are not turning on in while loop
Replies: 8
Views: 169

Re: GPIO pins are not turning on in while loop

Hi.

How are you driving the peltire moduals , as trying to drive them directly from the gpio pins won't work as the gpio pins can only supply or sink 16mA per pin max.

May be you should give us more detail about the hardware setup of your project.
by pcmanbob
Sun Jun 23, 2019 9:39 am
Forum: Python
Topic: Python code for Maxbotix HrXL-Wr (MB7360) Ultrasonic Sensor in I2C with raspberry pi.
Replies: 4
Views: 420

Re: Python code for Maxbotix HrXL-Wr (MB7360) Ultrasonic Sensor in I2C with raspberry pi.

The first thing is that the pi gpio is 3.3v connecting 5v to it will almost certainly damage the gpio and cause the pi to stop working sooner or later. also I don't see any address set up on the ADS1115 in your diagram ? I suggest you go look at these web sites on how to connect your ADS1115 to your...
by pcmanbob
Sat Jun 22, 2019 11:25 am
Forum: Networking and servers
Topic: rpi2 with 3 ethernet
Replies: 3
Views: 379

Re: rpi2 with 3 ethernet

If you don't want to use USB adapters then you could use a ENC28J60 Ethernet LAN Network Module it will only work a 10mbit/s but it will connect to the gpio pins see this thread https://www.raspberrypi.org/forums/viewtopic.php?t=131145 you might also want to look at this web site http://raspi.tv/201...
by pcmanbob
Sat Jun 22, 2019 11:15 am
Forum: Beginners
Topic: Stepper Motors and HAT
Replies: 3
Views: 184

Re: Stepper Motors and HAT

Did you look at your hat , there is a row of holes marked as gpio pins which you can use ( green arrow ) and 5v and ground in another row of pins ( yellow arrow ) https://i.imgur.com/jiIy2PP.jpg I suggest you go and read the documentation on the site you posted the link to. https://learn.adafruit.co...
by pcmanbob
Sat Jun 22, 2019 10:22 am
Forum: General discussion
Topic: Regular restart vs power on after electricity drop down
Replies: 11
Views: 723

Re: Regular restart vs power on after electricity drop down

Does what ever your auto start script is doing rely on networking ?

because after a power fail your networking may take longer to establish because your router will be rebooting too, so your auto start script will fail becuae it can't connect.
by pcmanbob
Sat Jun 22, 2019 10:19 am
Forum: General discussion
Topic: Display-o-tron HAT projects
Replies: 24
Views: 1166

Re: Display-o-tron HAT projects

To me that looks like your last line is to long for the display so the last part of it is auto wrapping on to the next line which happens to be the first line of the display. try printing the line you want to put on the LCD on your pi screen and count the number of characters including spaces. I thi...
by pcmanbob
Sat Jun 22, 2019 10:12 am
Forum: Networking and servers
Topic: Connection refused when trying to SSH
Replies: 3
Views: 436

Re: Connection refused when trying to SSH

You should not be opening port 22 on your windows PC that would be for incoming connections. did you use sudo raspi-config to enable SSH ? To be sure you could just create a file called ssh or ssh.txt by putting the SD card back in your windows PC. once you reboot your pi you should see the ssh file...
by pcmanbob
Sat Jun 22, 2019 10:00 am
Forum: General discussion
Topic: Is my HDMI port fried? RPi 3B+
Replies: 14
Views: 612

Re: Is my HDMI port fried? RPi 3B+

If your pi is suffering high chip temperatures then I would suggest you be prepared for it to fail some time soon. If part of your pi start heating up very hot very quickly is usually a sign that something has suffered damage and that damage will spread eventually causing the pi to die. sorry to be ...
by pcmanbob
Fri Jun 21, 2019 4:14 pm
Forum: General discussion
Topic: Is my HDMI port fried? RPi 3B+
Replies: 14
Views: 612

Re: Is my HDMI port fried? RPi 3B+

I was talking about my experience of homes in England (pre 1996 as it happens). I described my home that had fuses on each ring, of many, in the house. Before the era of earth leakage trips. Today we don't have old fashioned fuses but still I would expect multiple separate circuits. And hence I sug...
by pcmanbob
Fri Jun 21, 2019 2:27 pm
Forum: Beginners
Topic: How to turn on a LED
Replies: 8
Views: 556

Re: How to turn on a LED

If you are new to using a bread board this web site will give you a good grounding on there use .

https://learn.sparkfun.com/tutorials/ho ... breadboard
by pcmanbob
Fri Jun 21, 2019 2:16 pm
Forum: General discussion
Topic: Is my HDMI port fried? RPi 3B+
Replies: 14
Views: 612

Re: Is my HDMI port fried? RPi 3B+

DougieLawson wrote:
Fri Jun 21, 2019 1:53 pm
Your colours are wrong.

Green/yellow for earth
Blue for neutral
Brown for live.

My son is a sparky and is always showing off his photos of neatly wired distribution boards.
I know it was just an example I grabbed off the net to show how it was wired, with RCD protecting all the MCB's
by pcmanbob
Fri Jun 21, 2019 12:29 pm
Forum: General discussion
Topic: ayuda , help raspberry pi zero w
Replies: 3
Views: 104

Re: ayuda , help raspberry pi zero w

Would do you no good at all as even if you know which IC is faulty, you can't buy one and even if you could you would need commercial grade hot air rework station to replace it.

only option is a new pi.
by pcmanbob
Fri Jun 21, 2019 12:17 pm
Forum: General discussion
Topic: Is my HDMI port fried? RPi 3B+
Replies: 14
Views: 612

Re: Is my HDMI port fried? RPi 3B+

What? Last time I had a house in the UK it had separate fuses for the mains rings on each floor. The lighting circuits were separately fused as well. As was the kitchen oven I believe. From my experience of blown fuses in other homes that was quite normal. Even here in in this small Scandinavian ap...
by pcmanbob
Fri Jun 21, 2019 11:35 am
Forum: Troubleshooting
Topic: PI 3B+ WIFI not working on different AP/routers
Replies: 15
Views: 544

Re: PI 3B+ WIFI not working on different AP/routers

So I managed to lay my hands on an old D-link DSL-2640R wifi router ( surprising what junk you find stored away ) , setup pages / options are basic compared to more modern routers. only offers 2.4GHz wifi 802.11g or 802.11b or both security is wpa-personal, with WPA or WPA2 or auto( WPA or WPA2 ) Re...
by pcmanbob
Fri Jun 21, 2019 9:52 am
Forum: General discussion
Topic: ayuda , help raspberry pi zero w
Replies: 3
Views: 104

Re: ayuda , help raspberry pi zero w

Hi.

You should not change connections or make connections on the gpio pins while your pi is powered up,
you probably shorted the gpio to 5v or 5v to 3.3v or 3.3v to ground or 3.3v to ground, any of theses error will have damaged your pi,
your only option now is to buy a new pi.
by pcmanbob
Fri Jun 21, 2019 9:48 am
Forum: General discussion
Topic: Is my HDMI port fried? RPi 3B+
Replies: 14
Views: 612

Re: Is my HDMI port fried? RPi 3B+

Proababy. Given that a short in the kitchen, I presume, fused your entire house and blew a TV elsewhere I would suggest getting your house wiring fixed first. Before the whole place burns down! I agree the TV failing probably fried the HDMI port on the pi, But the whole house electrical supply goin...

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