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by frud0
Wed Nov 22, 2017 4:03 am
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: The best (fastest) bus for Pi (zero W/3)
Replies: 15
Views: 3041

Re: The best (fastest) bus for Pi (zero W/3)

@aBUGSworstnightmare Thanks sir... I was actually looking for a bigger display though. The bonnet is a superb project and is my reference for this (my) project. @Gavinmc42 Thanks a lot for the reply. EInk doesnt have that kind of properties for display... plus I need full color. Like a blue iris sor...
by frud0
Mon Nov 20, 2017 9:52 am
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: The best (fastest) bus for Pi (zero W/3)
Replies: 15
Views: 3041

Re: The best (fastest) bus for Pi (zero W/3)

The small type display has 2 problems for me... 1) small. my eye socket is about 2.5" 2) the refresh rate and viewing angle of the screen... thats why i hadnt purchased it till now. I was going to look for the screen with the best viewing angle... Also - A lot of the robots movements will be re...
by frud0
Mon Nov 20, 2017 9:45 am
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: The best (fastest) bus for Pi (zero W/3)
Replies: 15
Views: 3041

Re: The best (fastest) bus for Pi (zero W/3)

My design constraints have limited me to 2 separate small displays for the eye sockets... I spent my own money (this robot is for work) to buy 2 motorola mobile handsets for the same... cheaper and easier to interface and program... but they turned out bulky + large +P.S.: Poking eye is an extremely...
by frud0
Mon Nov 20, 2017 7:18 am
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: The best (fastest) bus for Pi (zero W/3)
Replies: 15
Views: 3041

Re: The best (fastest) bus for Pi (zero W/3)

I want to run 2 separate displays... are there 2 different HDMI buses or just one? I am sorry I am totally unaware of how HDMI works... but im sure there is no way I can split a single hdmi signal to feed 2 different displays. The displays are basically eyes of a robot - left and right. I would want...
by frud0
Mon Nov 20, 2017 6:43 am
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: The best (fastest) bus for Pi (zero W/3)
Replies: 15
Views: 3041

Re: The best (fastest) bus for Pi (zero W/3)

Also, for smaller displays, SPI is better than I2C?

As in faster?

I can vary the cable length, and power requirement. It's customizable in my system... so all of that wouldn't be a problem.

My main concern is speed - it's for a display that updates itself based on data received over tcp...
by frud0
Mon Nov 20, 2017 6:39 am
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: The best (fastest) bus for Pi (zero W/3)
Replies: 15
Views: 3041

Re: The best (fastest) bus for Pi (zero W/3)

I was thinking I should specify... but then didn't want to make the post too long. Sorry my bad...


640x480 resolution each, should be good enough for me... I will check the documentation on DPI... thanks a lot sir.
by frud0
Mon Nov 20, 2017 4:24 am
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: The best (fastest) bus for Pi (zero W/3)
Replies: 15
Views: 3041

The best (fastest) bus for Pi (zero W/3)

Hi, I am looking at interfacing 2 displays with a single pi-puter. I have a surplus of zero-Ws, so preferably with that, but I have space in my system, and am open to buying a Pi-3 for my application (since faster clock). I wanted to ask, which is the fastest bus on Pi systems? I use I2C for communi...
by frud0
Sun Jul 09, 2017 9:59 pm
Forum: Beginners
Topic: [SOLVED] Portable Raspberry Pi - Battery issues
Replies: 8
Views: 1466

Re: [SOLVED] Portable Raspberry Pi - Battery issues

Thanks for all the lovely help people. The problem was with the stupid PCA9685. Actually it is me who was stupid... The power for the servo motor - was grounding itself through the Pi. That is why the Pi kept restarting. I have isolated the Pi now. Thanks a lot! P.S. - To all those who are volunteer...
by frud0
Sun Jul 09, 2017 2:56 pm
Forum: Beginners
Topic: [SOLVED] Portable Raspberry Pi - Battery issues
Replies: 8
Views: 1466

Re: Portable Raspberry Pi - Battery issues

Ok I think I destroyed my Pi. Can someone please answer this one question for me? While trying different permutations for reducing connections in my system, I accidentally connected my +5.25v supply ground to the SCL pin of my Pi. I didnt notice - but did notice my OLED not working. I tried running ...
by frud0
Sun Jul 09, 2017 5:41 am
Forum: Beginners
Topic: [SOLVED] Portable Raspberry Pi - Battery issues
Replies: 8
Views: 1466

Re: Portable Raspberry Pi - Battery issues

Hello, Yes, keeping that in mind that nothing more than 5.25v for the Pi. The UBEC (Universal Battery Eliminator Circuit) gets the 7.4v down to 5.23v so its good. I am worried that my problem lies in the area you are trying to highlight... but my servos are driven directly by the battery (only their...
by frud0
Sun Jul 09, 2017 5:23 am
Forum: Beginners
Topic: [SOLVED] Portable Raspberry Pi - Battery issues
Replies: 8
Views: 1466

Re: Portable Raspberry Pi - Battery issues

You, Sir, are very funny. I hope the last sentence was a joke and that you are doing well. One thing I forgot to mention is, weight is an issue for me. The whole system is going to be resting on servos (3 axis setup), so not only do I have to control how much weight I am putting on these platforms, ...
by frud0
Sun Jul 09, 2017 4:59 am
Forum: Beginners
Topic: [SOLVED] Portable Raspberry Pi - Battery issues
Replies: 8
Views: 1466

Re: Portable Raspberry Pi - Battery issues

Sorry... is it too stupid a question. Can someone help me out please? Sorry for bumping the post, but it is really reigning my life right now. Parts here in India take time to deliver. I am a quick learner and promise to give back to this amazing community. As far as thinking about some solution: I ...
by frud0
Sat Jul 08, 2017 10:29 am
Forum: Troubleshooting
Topic: Python Script not starting on Boot
Replies: 11
Views: 5130

Re: Python Script not starting on Boot

https://www.dexterindustries.com/howto/run-a-program-on-your-raspberry-pi-at-startup/ I looking for a similar solution while running a display-less Pi as a standalone system. I attached a small OLED (128x64) and used to make it display the Pi's current WiFi IP address so I could SSH into it and dest...
by frud0
Sat Jul 08, 2017 4:42 am
Forum: Beginners
Topic: [SOLVED] Portable Raspberry Pi - Battery issues
Replies: 8
Views: 1466

[SOLVED] Portable Raspberry Pi - Battery issues

Hello, I am an ex-engineer - so quite possible what I speak may sound like utter nonsense... but please bear with me for the next few lines. I am building a scarecrow with a robotic head. The insides are as follows: 1 - Raspberry Pi - 1B 2 - TP-Link TL-WN725N 150Mbps Wireless N Nano USB Adapter (Eas...

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