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Dear all, From version Teensyduino > 1.59 I see warnings like this see below. Code is loading no issues there but the warning is not nice and must not be there. Version 1.59 no warnings > 1.59 warnings like this see below. I use Ubuntu Linux 26.04. Best, Johan WARNING...

The EA DOGM204W-A is a very nice display however not much information special when using SPI. Here my test setup with a Teensy 4.0 Look here EA DOGM204A-A T4.0 ------------ EA DOGM204W-A 13 ------------- 40 11 -------------...

Is was a small adventure to get my NHD-3.12-25664UCx running in parallel 8080 mode. // Interface: 8-bit 8080 Parallel // NHD-3.12-25664UCx // Oled 256 x 64 px character display // PD0LEW test example 18-05-2026 #include <Arduino.h> #include <U8g2lib.h> #define DC 23 #define CS 15 #define...

That make not much differences T. we have still a Setup and a Loop not that much different. But if you must do it in Arduino how you do it then ? Best, Johan

Hi all, My library, I use is the Ra8876LiteTeensy-master and a Teensy 4.0 , tested the code above but no luck and errors. Do we have still any ideas to test? Best and thanks, Johan Building in release mode Compiling .pio\build\T40\src\main.cpp.o src\main.cpp:1123:27: error: non-member...

Dear all, I am strugeling with the backlight PWM of my RA8876 display, using pin 14 to 3.3 V than it works that the simple way. I removed R27 and short R28 as given in documentation the thing is I like to controll the backlight intensity via code. I tried this already tft.begin(46000000)...

To scroll the text as seen in the video there is a bit more needed and well my PrintandScroll_RX function see code below, here words are not broken if at end of line but copied at incoming line. I hope other people like this for CW, PSK and RTTY modems. 73' PD0LEW Johan void...

Scroll many lines of text with minimal delay. I use the RA8876 for my RTTY modem with 14 lines of text and a lot of characters. To shiftup everything without hardware scroll then it looks not nice. Now with this modified code you will see nearly no delay when shifting up 14 lines of text...

I think Paul and the technicians are that smart that they do a USB C.

Aha that make sense, I tested a wm8731 and that works perfectly. Forget the PRJC audio board for my question. Thanks for helping T. Best, Johan

Thank you for coming back on my question! But this gives not much info... did you mean we can go to 96KHz with only #define AUDIO_SAMPLE_RATE_EXACT 96000.0f ? I looked more in detail and tested yesterday code below it turns out that I can go max 88.2 KHz measured with my scope on Pin 2 Today I...

Hi all, For my new CW decoder I need 96Khz sample rate instead of 44.1 KHz. I use the newest audio board and a Teensy 4.1 is this possible. I looked at this forum but I can not find anything about this..... perhaps not possible.? Best, Johan

It's also not a 6" but a 7" here I show you what I mean ... this can be a bit better. Best regards, Johan

Unfortunately layers are not supported in this library, I used layers a lot in the RA8875 but in the the lite version I can not find anything about layers. Best, Johan

Hi group, Is there anyone who can help with the font rom for my RTTY decoder. The thing is when using LiberationMono font and use 9 lines of text and when shifting up it not looks very nice that can better. There is simply to much delay, with the font rom we can avoid that problem and shifting...

I think we must redo keywords text for the RA8876 because a lot of things are not there when I look in source files. This is confusing so I will make a new keywords file special for the RA8876 display. My RTTY modem works awesome on a RA8876 display. Here the very basic setup to get something...

Thank you for the reply, but how to use this in my Arduino code .... perhaps a stupid question...

Not working on my RA8876 display error: 'class RA8876_t3' has no member named 'initExternalFontRom' 35 | tft.initExternalFontRom(0, rom); error: 'class RA8876_t3' has no member named 'selectExternalFont' Best, Johan

Dear group, For the speed of my project I need to use external font rom ER3304_1 is this possible with the RA8876 7" display. Best, Johan

I noticed that is not coming from the index but from QNEthernet and #include <AsyncWebServer_Teensy41.h> i think this is not solveable.... The code below is simply working but it's only a web page. #include <SPI.h> #include <LittleFS.h> #include "index.h" // Include the index content...

Dear all, My Teensy 4.1 has no memory enough for my Power meter firmware and webserver, webserver is working fine when no power meter code is included. I soldered a extra flash chip underneath the board. I have several webpages but the index page is the biggest, can someone help me out how to...

This is the story from a PhD student who uses the awesome Teensy 4.0. Big thanks to Joe Pasquariello who made this possible. As attached some pictures. Best, Johan Explained by student --------------------------------------------------- My name is Prapti I am a PhD researcher at the...

The code above input is running from 0.1Hz till 10kHz with a perfect duty cycle..... at our university we tested a lot but simply this can only be done with a T4. The rising and falling edges from both input and output must be nearly the same and doubled in the code above about 200ns difference...

I will show you the results upcoming Monday when I do the real test. Here I use the Lockin SR830 to generate say 7.0 Hz this is doubled to 14 Hz the output from T4.0 goes directly to a ZVA40 VNA to set the output power in dBm . I will send some pictures from my test setup.

Thanks a lot for the code, I think it will work I will test this upcoming Monday with the SR830 at 7.777 Hz and see what the output is. Again thanks a lot!!! Best, Johan

I am stll not done perhaps someone can help, the offset is still to big see attachment. #define INPUT_PIN 2 // Pin for the 4 Hz input signal #define OUTPUT_PIN 3 // Pin for the 8 Hz output signal #define TEST_PIN 4 // Pin for the adjustable test signal #include <TimerOne.h> #include...

Forget to say that the input can be changed from 2 Hz till a few hundreds of Hz.

The project is not done.... there is a small / big issue because the output is not in sync with the input. That means the rising edge from the output must inline with the input, I see drift in the output signal. Here we need a smart solution perhaps hardware timers from T4.0 I not have the...

Waiting......we introducing something new ....give me 5...

The SR830 is adjustable in frequency, the output from the SR830 must be doubled at all times. I already made something and it works awesome. Anyway thanks for pointing out. Best, Johan #define INPUT_PIN 2 // Pin for the 4 Hz input signal #define OUTPUT_PIN 3 // Pin for the 8 Hz output...

Dear all, For my measurements I need a freuency doubler, I use a SR830 lockin amplifier as source and the ouput frequency is 4 Hz I like to double it to 8 Hz, the input wave is a squrae wave and after doubeling the wave must be exactly 8Hz. The Lockin is adjustable I need a range from 4Hz to...

The meter acts now as a proportional valve controller, here i used a teensy 4.0 with ADS1115 AD converter.

Now my meter is nearly ready it is time to show it on YouTube .... Vacuum meter use USB disk for Datalogging Thanks all for the help! Thanks PJRC for this great microcontroller! Johan

Great great product the Teensy 4.1, very happy with this powerful beast.

The USB datalogger is ready, I log 3 variables Time, Date and measuring Pressure. I measure once a minute and that during 30 days, after 30 days I make a new file with name as datalog_2024_06_25_201802.csv the unit has also a realtime clock. Best, Johan

MTP Disk (Experimental) you are right not needed at all,... Thanks for the remark. Best, Johan

This an example my real project log 1 time a minute, no reason to make worries at all. Best, Johan

There is a important NOTE: please set in Tab Tools, MTP Disk (Experimental).

Dear all, I modified the code as example for those who need a decent USB stick logger. The time, date and a pressure value is with headers in the .csv file. Time is taken when your project is loaded and when a battery is installed your RTC keeps the time for the logging index. Some message...

Works out of the box good example. I can use this now with some modifications in my project! Tested with a 16Gb and Teensy 4.1 logged about 131271 records without any issues. Thanks for helping! best regards Johan

Perhaps this is a better approach to use a USB stich on the Teensy 4.1 USB host.... are there any example programs for testing. I looked a bit arround but not find a lot of info. I like to log on the USB stick as example temperature and pressure. Please help, Best, Johan

Thank you all, pretty good idea. A lot of EEproms are not available this moment I like to use this one W25N01GVZEIG (Mouser nr. 454-W25Q512JVEIQ) will this go to work with a Teensy 4.1 ? Best, Johan

Dear all, I use a Teensy 4.1 and a SD card 32Gb for data logging I log about 29 bytes/min (15mB year) this must be run for two years for a long time test project. My question how reliable is a SD card because I have many write operation during the two years is that still a good idea? Please...

Hi all, Its very simple to get this working with a Teensy I used a Grove module Grove-RS485 see link, https://www.kiwi-electronics.com/nl/grove-rs485-4193?country=NL&utm_term=4193&gad_source=1&gclid=EAIaIQobChMI36755tO_hQMV_rCDBx0DWw2REAQYASABEgIL-PD_BwE Best regards, Johan // Modbus RS485...

Hi all, There are a lot of RS485 modbus programs but the code below works out of the box and is fully tested on a T4.0, T4.1 and ESP32C3 for the ESP32C3 you need only change the Serial5 to Serial0. Look at the SensorModbusMaster for the modbus registers. Used modbus converter is a Grove RS485...

F This must be added in WireIMXRT.cpp to get the I2C clock on 2 MHz } else if (frequency < 1000000) { // 400 kHz port->MCCR0 = LPI2C_MCCR0_CLKHI(26) | LPI2C_MCCR0_CLKLO(28) | LPI2C_MCCR0_DATAVD(12) | LPI2C_MCCR0_SETHOLD(18); port->MCFGR1 = LPI2C_MCFGR1_PRESCALE(0)...

Hi Dave, This is what I used for my power and SWR meter and changed it a bit for you..... Hope it is usefull. Best, Johan #include<Wire.h> #define AD7991REF 2.60 int8_t ad7991_addr = 0; // Address of AD7991 I2C connected A/D, 0 if none detected #define AD7991_0 0x28...

Hi group, If you need ever a high speed ADC I have tested the LTC2315-12 on a Teensy 4.1. // We use SPI MISO = 12, SCK = 13 CS= 10 // Tested on Teensy 4.1 measured with scope SPI clock at 5MHz #include <SPI.h> #define CS 10 static uint8_t LTC2315_shift = 1; float LTC2315_vref = 3.315; float...

Hi Michael, That explains a lot now it's clear thanks again for the clear explanation. Best regards, Johan