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by nike357
Thu Jul 19, 2018 4:23 pm
Forum: Troubleshooting
Topic: Changing GPIO behaviour in (https://pi-control.de)
Replies: 0
Views: 120

Changing GPIO behaviour in (https://pi-control.de)

Hi I am using https://pi-control.de/ together with the GPIO Plugin on my Raspberry to drive the https://www.waveshare.com/wiki/RPi_Relay_Board#Webiopi_program through the WebInterface. It's working fine except for the default GPIO defination. The Relays are are low active and when I reboot my Raspbe...
by nike357
Fri Feb 23, 2018 9:48 am
Forum: HATs and other add-ons
Topic: Gertbot (Heatsinks) and Stepper Motors getting very hot
Replies: 16
Views: 9414

Re: Gertbot (Heatsinks) and Stepper Motors getting very hot

Hi Guys, It's been a while since I had time to play around with my GertBoard. I've just received a couple of new Stepper Motors and I think they are better suited. They are Shinano Kenshi STP-42D3019-01 according to the web they should be 24Volts at 2Ohms unfortunately I do not find the fully spec s...
by nike357
Mon Oct 17, 2016 12:40 pm
Forum: Automation, sensing and robotics
Topic: Shell access over 433 Mhz
Replies: 4
Views: 908

Shell access over 433 Mhz

Hi All, I am building a Solar powered (battery buffered) wheater station with my Raspberry Pi Zero and as it is too far away for my Wifi I'd like to use 433 or 868Mhz RF modules to realize remote shell access. Has anyone tried something like this? I have seen this tutorial and it's fine for communic...
by nike357
Sun Oct 16, 2016 4:46 pm
Forum: HATs and other add-ons
Topic: Gertbot (Heatsinks) and Stepper Motors getting very hot
Replies: 16
Views: 9414

Re: Gertbot (Heatsinks) and Stepper Motors getting very hot

Hi Just found time to test running three Stepper Motors in Serial. IT WORKS!!! It just needs a bit trial and error selecting the correct frequency and step count but now they're running smooth without any heat generated. The motors as well as the gertbot are staying perfectly cool, at least below bo...
by nike357
Wed Oct 12, 2016 6:29 am
Forum: HATs and other add-ons
Topic: Gertbot (Heatsinks) and Stepper Motors getting very hot
Replies: 16
Views: 9414

Re: Gertbot (Heatsinks) and Stepper Motors getting very hot

Thank you everyone, I didn't thought that it would be that big difference to running the Stepper Motors on a Ramps with A4988.
So far I only had experience with chopper type devices and those run practically every Stepper without any issues.

Maybe i rethink my plans and switch to DC Motors.

Regards
by nike357
Tue Oct 11, 2016 8:23 pm
Forum: HATs and other add-ons
Topic: Gertbot (Heatsinks) and Stepper Motors getting very hot
Replies: 16
Views: 9414

Re: Gertbot (Heatsinks) and Stepper Motors getting very hot

Thanks for your thought's, haven't tested running three motors in series. Just wanted to get some feedback and not putting too much load on the board again. If running three motors in series with 10Volts is okay for the board then I'd give it a try, i just don't want to fry my gertbot. Basically wha...
by nike357
Fri Oct 07, 2016 6:06 pm
Forum: HATs and other add-ons
Topic: Gertbot (Heatsinks) and Stepper Motors getting very hot
Replies: 16
Views: 9414

Re: Gertbot (Heatsinks) and Stepper Motors getting very hot

thanks, now I understand. So if I'd like to run my current stepper motor i'll need to add a resistor to each coil,online calculator gave me a 2Ohm resistor to achive 3,3Volts with burning app. 50Watt something, that's just to much power loss. I guess i'll search for another motor. Just thought I'd c...
by nike357
Fri Oct 07, 2016 4:08 pm
Forum: HATs and other add-ons
Topic: Gertbot (Heatsinks) and Stepper Motors getting very hot
Replies: 16
Views: 9414

Re: Gertbot (Heatsinks) and Stepper Motors getting very hot

That's an easy one. A quick google for the specs of the motor shows 12VDC @ 1.7A max [...] So by trying to run it at 3.3V you are trying to draw potentially 6.2A (stall condition) from 3.3V!!!! I just read your lines a second time, how do you come to 6.2A at 3.3Volts when the motor specs show 12VDC...
by nike357
Fri Oct 07, 2016 3:42 pm
Forum: HATs and other add-ons
Topic: Gertbot (Heatsinks) and Stepper Motors getting very hot
Replies: 16
Views: 9414

Re: Gertbot (Heatsinks) and Stepper Motors getting very hot

Thanks, I was afraid of this, I just don't understand why this is an issue with the Gertbot while the same motors are running fine on my 3D Printer. I have another Stepper Motor Model: MINEBEA Type 17PM-K018-G22ST 3V at 1.2A per Phase I am not good in electronics and therefore don't know how to calc...
by nike357
Fri Oct 07, 2016 3:23 pm
Forum: HATs and other add-ons
Topic: Gertbot (Heatsinks) and Stepper Motors getting very hot
Replies: 16
Views: 9414

Gertbot (Heatsinks) and Stepper Motors getting very hot

Hi Guys, I have a Gertbot running two Stepper Motors and the Gertbot and the Motors are getting very hot after running app. 2000Steps. I use 12V from an old ATX PSU to supply the Gertbot. The Steppers are this kind: SHINANO KENSHI STP-42D204-01 3.15 V 0.7 Amp 4.5 Ohms/phase 1.8 deg/step I have the s...
by nike357
Tue Jul 26, 2016 9:25 am
Forum: Automation, sensing and robotics
Topic: Raspi Camera Picture overlay with Sensor Data
Replies: 5
Views: 1103

Re: Raspi Camera Picture overlay with Sensor Data

Thanks, that looks like it will do the job.
by nike357
Tue Jul 26, 2016 6:57 am
Forum: Automation, sensing and robotics
Topic: Raspi Camera Picture overlay with Sensor Data
Replies: 5
Views: 1103

Re: Raspi Camera Picture overlay with Sensor Data

Thank you very much! I will give ImageMagic a try. When googling your recommendation i stumbled upon some guys using picamera and text annotation. Can someone give me a hint how to replace the static text with some input from a file? (e.g. overlay_data.txt) import picamera import time with picamera....
by nike357
Mon Jul 25, 2016 1:16 pm
Forum: Automation, sensing and robotics
Topic: Raspi Camera Picture overlay with Sensor Data
Replies: 5
Views: 1103

Raspi Camera Picture overlay with Sensor Data

Hi
I want to have my Raspberry take a picture once an hour (this is easy I know how to) and overlay some additional sensor data on the picture taken.
e.g. Voltage, Temp etc.
I know how to read the sensors but I have no idea how to overlay this to the picture taken.

Regards

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