Recent Posts

11

Thumby / Porting micropython thumby libraries to C?

« Last post by casssoft on April 04, 2024, 11:40:06 AM »

I'm starting to look into how i want to make games for the thumby but I realized there's a lot of micropython only functionality like saves and sprites. (I'm addicted to C).

Could someone give me a few pointers and how to reimplement the micropython stuff in C? Here's some of the specific stuff I was trying to figure out:

Where in the micropython fork should I be looking for thumby specific stuff? there's a couple of branches and files, is it all just in rp2? Whats actually loaded on the thumby? there's probably something in the code editor repo i haven't found yet...

For hardware interaction I definitely need to figure out how to load littlefs or whatever filesystem abstraction micropython is using. Is there a specific place in the repo that deals with that? I might just try loading up a littlefs C library..

Also is there any other hardware interactions that C is missing besides the filesystem? I see a sprite system but maybe that's just a nice wrapper around loading sprites and writing them to the buffer.

(anyhow thanks for reading)

12

TinyTV & Tiny Video Player / Re: HiRes video converted to TinyTV has +60% file size

« Last post by Dominicus on April 01, 2024, 07:37:07 PM »

Thanks for sharing the technical details. After reading up on MJPEG all makes sense.

13

General Discussion / Drift in Read Voltage

« Last post by kmarxx on April 01, 2024, 06:55:42 PM »

I was using the TinyDuino to read in a voltage value (20 readings / sec) which fluctuated between ~2 - ~4 volts over about 12 hours. I noticed what appeared to be drift over the course of the 12 hour test and after some troubleshooting I realized that even when the voltage being read by the duino was constant (was using pin A5 to read voltage), the data that the duino would save to my SD was drifting... tried to replicate the issue with an Arduino Uno but it saved constant voltage values without drift?

Any thoughts on what could cause this? Is this a known problem with the TinyDuino platform?

Thanks!

14

TinyTV & Tiny Video Player / TinyTv + Akai APC

« Last post by Kalacolella on March 29, 2024, 10:55:25 PM »

Hey there! I was wondering if there’s a way for me to connect my TinyTv to a Akai APC mini controller?

15

TinyTV & Tiny Video Player / Unable to access TinyTV website and converter

« Last post by MarkNYC on March 29, 2024, 02:42:54 PM »

Hi,

For some reason, I'm unable to access the website in order to convert my files to play on the TV.

Is anyone having the same issue?  Is there another way to access the converter?

Thanks,
Mark

16

TinyTV & Tiny Video Player / Re: HiRes video converted to TinyTV has +60% file size

« Last post by Ben Rose on March 27, 2024, 05:22:41 PM »

Hi- yes, it's counterintuitive but the file size can increase due to the encoding used within the AVI file. TinyTV uses a very low power microcontroller so the AVI contains a MJPEG video stream and uncompressed audio which is all it can handle. The compression ratio is low compared to H264 that might be in a MP4 file, but that's how we're able to achieve the video playback on a device this size/cost.

Thanks,
Ben

17

TinyTV & Tiny Video Player / Re: Replace Battery with external Power

« Last post by Ben Rose on March 27, 2024, 04:52:57 PM »

Yes, for the TinyTV DIY Kit you can replace the battery with a switched 3-5V supply connected to the JST SH connector. Note that 5V should absolutely not be exceeded on this input! It can damage the battery charging circuit. Less than 5V will not damage the battery charging circuit.

Thanks,
Ben

18

TinyTV & Tiny Video Player / HiRes video converted to TinyTV has +60% file size

« Last post by Dominicus on March 26, 2024, 04:32:44 AM »

I used Converter application on a 720p .mp4 video 450MB.  The resulting file had the low resolution, but the file size went up by 60% to 720MB.  What?

19

TinyTV & Tiny Video Player / Re: TV2 can storage be expanded and can it always stay plugged in?

« Last post by Jason on March 20, 2024, 01:47:39 PM »

Looking to keep this on my desk at work and continually play all my favorite show. Can I add any size micro SD and always keep it plugged in

Thanks

TinyTV 2 was not designed to have the card replaced and therefore we do not support it. However, I have heard of brave users taking it about and putting larger cards in.

20

TinyTV & Tiny Video Player / TV2 can storage be expanded and can it always stay plugged in?

« Last post by Np1511 on March 19, 2024, 11:18:56 AM »

Looking to keep this on my desk at work and continually play all my favorite show. Can I add any size micro SD and always keep it plugged in

Thanks