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update : I tried a "W25Q512" WSON8 package on back to T4.1, which gives 64MB, and a whooping 4434 FPS (over 4000 probably was buggy for some SPI LEDs if PWM not enough fast...) when using 160 pixel bmps, so quite enough for me. guess a W25N01 "128MB" could also work, but no luck yet. probably...

Hi, I currently don't solder the 2020 LEDs myself anymore, I order from internet PCBA... mostly I encounter data/clk pin shorts to Vcc or gnd, which is obvious as I can see the LEDs aren't updating after a specific LED, just check the pins nearby and typically short could be found However if...

oh,, just found that WSON package is probably hand solder-able?

Yes I mean flash, but flash for otherwise file MTP usage not used for program. I mean physically, I am using Teensy 4.1 and it's back side pad on backside with a winbond 128Mbit chip, trying to replace/compete with my SDIO version( using the SD slot on Teensy 4.1), both were very fast but QSPI...

Hello community and good morning : Still working on my persistence of vision project with a new 160HD and T4.1 version (https://forum.pjrc.com/index.php?threads/posted-venti-pov-v2-0-80hd.53088/#post-361041) it's almost done with SDcard/sdio version, just a bit slower frame rate at ~1600 per...

actually should be this, getting my latest PCB design and it should be all done

Since it's worn inside the USB.... I'm thinking if some WD40 or other lube could reduce some of the worn over time? and it should be added at first as... if detach already happens there was no cure🤷‍♂️🤷‍♂️

Currently somewhat working with this design, not stable and sometimes stall with LED lighting on, probably resistance over my probes... and low voltage since It's powered directly by lithium battery but not a 5V boosted I'll revise again when it's a full product, it should be working with...

Inspired by the power latch, I'll add a N-channel mos to my P-channel mos setup up there, I only had 10k or 1M ohm resistor with me so not sure if it's working properly The button : This setup I still rely on the on/off button, hopefully it'll work

Thank you, this look exactly useful, I remember seeing this design on some other LED product in the flow art market... I'll think of a way soon and see if it fits

Thank you, this is helpful in some way: I can imply the software OFF in my cycle so that it could close when idle for minutes or user press. My previous hibernate is coded to press for 2 seconds, much shorter than 5 of the ON/OFF. But in my case, my device would only have an exposed button...

Questions about Teensy 4.1, MOSFETs, and ON/OFF Button for Battery-Powered LED Project Hello community, I have a few questions regarding using MOSFETs and the ON/OFF button with Teensy 4.1. Previously, I built a battery-powered addressable LED strip project as a Persistence Of Vision (POV)...

Recent update: I had some luck learning python and have some experience on using it on 2024, and with the progress of some AI coding, I decided it's time to go for a GUI. so after June and ~1 month of progress I've made the, with python on Visual Studio Code, available on windows and MacOS. I...

Hello, very thank you I've never used RTC in T4 before, and not used in my project, what extra hardward/software or library setup is needed? Do you have an example such as blink working with minimal hardware, or using systick like snooze used to?(for lower wake up interval less than second)...

Sadly the snooze isn't fully supported in T4 IMO, not sure if it would be there later, or does anyone had a solution?

I have no idea how ARM C7 works or why 😂😂 , Just accidentally found the solution somewhere in another DMA library. So glad I can keep my DMASPI as it is much faster. My code probably would work fine in my previous 3.6 and LC hardward, just... DMAMEM, thought that would always be necessary (or...

referring to "https://forum.pjrc.com/index.php?threads/bug-in-arm_dcache_delete.68100/" not sure what bug but removing "DMAMEM" in "DMAMEM byte address[DMASIZE];" fixes the problem.... and makes the LED updates will report later if all else works

Hello community, I am applying the old code with DMASPI to use apa102 in T3.6 and LC, to T4.0, But I cannot get the DMASPI to work with T4.0. Here is the sketch ino file and used DMASPI library, https://github.com/Alan-NTHU/T4_DMASPI1_test The test results are: The strip did update normally...

Wow cool, that essentially gives SPI almost DMA speed but not messing with all the DMA thing Thanks for the tip :) , I don't know we could just attach interrupt with the spi.tranfer() function. Though I just completed the coding to use T4 DMASPI with your modified version yesterday😂😂 Meanwhile...

It's been a long time and I finally have some time to seek to move my POV project from T3 to T4 I have to redig into old codes and things and test them on T4😂😂 @mercyful : the refresh speed could be higher if you use DMA with SPI, OctoWS2811 with enough hack could work on parallel apa as if it's...

I'm using JLCPCB on most of my project, because China is close to me... much cheaper shipping available. I believe PCBway is also located in China, they provide near same service (PCB/assemble/3DP/CNC....) not sure how they are related but pricing seems a lot cheaper on JLCPCB in many ways. My...

Okay :( I saw it's not updated for some time, With "Serial" chosen it's not working properly with and will reset before going through setup(); The old version of snooze without the USBserial-snooze block can still work with "MTP_experimental" used so its fine with my old LC sketch, I guess I...

Thank you :) I'm planning on updating the project using Teensy 4 this year Should I post on a new thread, or reply under this thread?

Hello, not sure if this is related problem Snooze examples (this case: Snooze\examples\deepsleep\button_hold_wakeup ) not compiling with T3.6/LC/T4, with USB Type: "MTP Disk experimental" chosen , while choosing the default "Serial" it's fine...

you're right, your wires should work I use a MCP73831 to charge my portable teensy device, made with LC, connection is similar with your picture above, However you can test the connections separately to make sure that works well :)

Sure, why not I did made some version using teensy LC and its fine. using SD card/apa102 It would be restricted to its SD reading speed, but still can use DMA for apa102 drawing could reach up to 40 pixels and still have some good enough POV effect for flowart

Hello, I use nRF24 module a lot too, the library is fine with LC, but I've not tested with T4 yet. Not sure if the RF24 library did recognize it as using SPI pin, or soft SPI if the latter, 600mhz bit bang could possibly be too fast for your nRF module, you try to compile your code at...

tested with another example here using onboard LED for feed back #include <Snooze.h> SnoozeBlock dummyConfig; SnoozeSPI sdCard; SnoozeDigital digital; SnoozeTimer timer; SnoozeUSBSerial usb; SnoozeBlock config_teensy2(usb, timer); SnoozeBlock config_teensy(usb, sdCard, digital); void setup() {...

SnoozeTimer timer; SnoozeUSBSerial usb; SnoozeBlock config_teensy2(usb,timer); Serial.println("ready to sleep"); timer.setTimer(2); Snooze.deepSleep( config_teensy2 ); Serial.begin(115200); Serial.println("waked, good1."); delay(2000); timer.setTimer(4); Serial.flush()...

SnoozeUSBSerial usb; ... ... #if defined(__IMXRT1062__) SnoozeBlock config_teensy40(usb, digital, compare, alarm); Hi, I'm still testing too so I cannot give a concrete answer, but looking into the examples code above, its always has the object "SnoozeUSBSerial", not sure why and without it...

hadn't following for a while, I did this before with T3.6, an external button interrupt was used to break flag. it should break after a button is clicked and a mtpd.loop() is returned I never know if that was healthy to the SD, no problem to me so far while (globaltime < 3000) { //...

Yes it already could. However SDIO interface is not avail in teensy 3.2, so it will transfer file at a significant slower rate.

First my codes, should need to use some my specific libraries, (though if I remember correctly, the same library with 1.8.7 compiles too) this was the full folder of my used version and libraries, and this was the .rar of my code when the post was published. it should work(compile) with...

hi alezarate, Sure, I shall publish my work in a while. You are correct, I'm just not yet convinced if I can't find any commercial value with my design It didn't gave me much over two years :) just very fun flowing with it and showing to my friend I'm currently switching my job from flow art...

Hi Frank, you can find an older version for arduino nano here : https://github.com/Alan-NTHU/POV-Venti---flow-art currently I'm not planning on publishing Teensy version of code yet, however you can find many other code here...

Hi Janezek, yes both the youtube links is visit-able, I'm just not sure what's the glitch but I see it clearly now the data transfer rate or even frame per second could do something to the ws strips at early version, causing ugly flickering , not sure if yours do the same your second video...

Hi Janezek, not sure what your glitch is like, can you be more specific? or is there a normal group to compare with? I saw you have 1531 pixels, if you're using ws pixels you might need to care for power supply and refresh rate, It is not strange when static color like CRGB::Blue won't glitch...

Thanks, hope you have progress on your work too! at first I've think ROM at chop is not enough so I focus on using a SD, very well established library, and seek on ROM chip but not successful its quite enough on T3.6 or T4 but not at T3.1 or arduino For everyone: here's another record of the...

Hi, My code attachment on #3 should work, please give it a try I no longer use the TLC5947 or TLC59711 driver in my later version of POV. but the library and code should work, you may look into it and see the code, the SPI of the driver is different and works 12bit for a LED, if you don't...

Hello, Happy new year community :) I have did another build of POV ( is this still POV anyway? lol) for a drum. featuring Teensy LC and 4m (1m*4) of apa102(60pixel per meter) in parallel of meters. time-coding is so flexible for any kind of performance : It can make some time-specific and...

Hello, following also, had anyone successfully tested MTP on teensy 4.0? Thanks

I use some of a elapsed microseconds and use other things to do that, and check if time is favored or not before FastLED.show(), or DMAshow(), whatever draws the LED this part of my unsigned long targetmicros = 0; elapsedMicros nowmicros; all other variables are accordingly, with my lines...

@Janezek I suggest using octows2812 library, available at PJRC website libraries which splices your LED chain into 8 parallel chains and uses DMA for maxima speed but you'll need more setup on hardware connection , more wires to solder but shouldn't be a problem

@abrownmn : did you meet any problem using with the hardwares? Not sure if cap/resistors matter, I did add a 47uF between my power battery teensy have enough cap on the board and apa102 were pretty robust and don't need extra cap to work fine, adding some 470R between apa102 data<-teensy MOSI...

Sorry to interrupt, sharing my work on POV :) Here's my latest POV, 36 pixels with Teensy LC setup, surely it should run well with Teensy 3.6 I think? I'll do that later in JULY. I've completed adding on nrf24 module into my POV and achieved wireless synchronize, while MTP cannot be used with...

@abrownmn : freezing sounds like a power supply bug, if you have your image squeezed, you can adjust settings yourself for a good effect. I recommend at a speed that repeats letters "ABCD..." less than 40 units a second, and compact pictures "a face, pikachu or something" not more than 20...

Hello, Its been nine months,I've completed adding on nrf24 module into my POV and achieved wireless synchronize, and also a easy version as a hand LED-stick. I can also recommend nRF24 module for anyone looking for wireless option. :D it works with my teensy LC module, while MTP cannot be used...

apa102c and apa102 (or sk9812 from China clone) those use SPI wires are probably all usable with FASTLED library with apa102 setup, if you were looking for a source, I know the origin company contact of the Intellectual design in Taiwan.

Hello, did you make it well? Now I have trouble using nrf24 with SD card on the same SPI port of LC :\ So looking around if anyone meet this problem too.

hello, checking in here. Sorry for reviving, just thinking about the same thing : the libraries were hard-coded to SPI0 and need work to use in SPI1 in my case I probably will be fine to use SD card with SPI1 and nRF24 with SPI. (teensy LC is it, otherwise I use SDIO too) both can begin() and...