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by OutoftheBOTS
Wed Aug 02, 2017 11:22 am
Forum: Other projects
Topic: 64x32 LED display
Replies: 21
Views: 8367

Re: 64x32 LED display

yes the number of LEDs would create some interesting challenges. You could run them as rows of 64 LEDs with separate power to each row this would easily solve the amps problem. Although amps shouldn't be any higher for same brightness as the original LED matrix that was trying to be used. You would ...
by OutoftheBOTS
Wed Aug 02, 2017 11:00 am
Forum: General discussion
Topic: pi 3 ubec rating for gpio power input
Replies: 14
Views: 1999

Re: pi 3 ubec rating for gpio power input

I haven't looked at the schematic so probably should. Is the RPi Zero W that same ?? I generally use the 5v pin as it is usually easier place to power from a battery with buck converter as I tend to be plugging in other stuff on the GPIO header anyway and then I don't need a mico isb plug and also i...
by OutoftheBOTS
Wed Aug 02, 2017 10:51 am
Forum: General discussion
Topic: Raspi hat blocks all the gpio pins
Replies: 32
Views: 6193

Re: Raspi hat blocks all the gpio pins

either way to help out with the problem of using GPIO pins for Ultrsonic sensor in combo using an Adafuit motor Hat (someone needs to tell Adafruit that r not allowed to called there device a hat). All you need to do is use a straight through 40 pin header this is standard practice for all experienc...
by OutoftheBOTS
Wed Aug 02, 2017 8:14 am
Forum: General discussion
Topic: pi 3 ubec rating for gpio power input
Replies: 14
Views: 1999

Re: pi 3 ubec rating for gpio power input

I usually power my RPi via the 5v gpio pins for all my mobile robotics projects. Usually from a battery and a buck converter to regulate the 5v I was under the assumption that the 5v GPIO pins and the usb plugs r just a common rail and there isn't any difference between power from either can someone...
by OutoftheBOTS
Wed Aug 02, 2017 6:21 am
Forum: General discussion
Topic: Raspi hat blocks all the gpio pins
Replies: 32
Views: 6193

Re: Raspi hat blocks all the gpio pins

The motor hat designed by Adafruit is especially designed to be stacked. When you solder the 40 pin header on you just need to solder a straight through header for stacking. This hat is an I2C hat so only uses the 2 I2C pins but this doesn't stop you evn stacking more I2C devices as long as they hav...
by OutoftheBOTS
Tue Aug 01, 2017 10:16 pm
Forum: Automation, sensing and robotics
Topic: Detect audio, preform function
Replies: 5
Views: 1883

Re: Detect audio, preform function

This sensor just has analog output so to use it with a RPi you will need to connect it through a analog to digital converter (ADA). Then this will give volume of sound so you will be able to program it to take a pic anytime there is a load sound
by OutoftheBOTS
Tue Aug 01, 2017 10:10 pm
Forum: Automation, sensing and robotics
Topic: ADXL 345 and duplicate readings
Replies: 7
Views: 1737

Re: ADXL 345

I haven't looked through your code to see exactly how you r running this sensor but I did have a very quick read of the the sensor data sheet that has all the specs see http://www.analog.com/media/en/technical-documentation/data-sheets/ADXL345.pdf as with most of threse chips they have a power savin...
by OutoftheBOTS
Tue Aug 01, 2017 11:07 am
Forum: Other projects
Topic: 64x32 LED display
Replies: 21
Views: 8367

Re: 64x32 LED display

I not sure if you guys have seen the addressable RGB leds. Each LED has a chip on it. The RPi just sends out a stream on data to the RGB pixels and the first pixel takes the first RGB data then passes on the the rest then the next RGB pixel takes the next bit of data and passes on the rest and so on...
by OutoftheBOTS
Tue Aug 01, 2017 10:57 am
Forum: Other projects
Topic: Mini wearable camera project. Help!
Replies: 3
Views: 623

Re: Mini wearable camera project. Help!

Teh RPi Zero W sounds like your what your after. It is quite small and has bluetooth and wifi. You can plug the PiCam into it and picam is small and very smart featured and capable. As you say you will need a battery and might get away with a little 1 cell Lithium battery and use a step up converter...
by OutoftheBOTS
Tue Aug 01, 2017 10:32 am
Forum: Automation, sensing and robotics
Topic: PIR motion sensor alternatives?
Replies: 7
Views: 3098

Re: PIR motion sensor alternatives?

most of these PIR movement sensors work by taking images and compare the differences between each image and any difference is motion. The good thing about these typoe of sensors is they see infrared light not visible light meaning they are seeing body heat, so if trees blow in the wind it won't set ...
by OutoftheBOTS
Tue Aug 01, 2017 10:28 am
Forum: Automation, sensing and robotics
Topic: Controlling servos and motors
Replies: 2
Views: 850

Re: Controlling servos and motors

Getting a motor to turn at a constant RPM is quite a tast for a computer. A few things to understand: There r a few types of motors and each have advantages and disadvantages. Main types of motors are Brush-less, DC and stepper. Brush-less are very high performance/efficient and have good control bu...

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