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  1. Replies
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    DC-DC switching converters repeatedly switch on...

    DC-DC switching converters repeatedly switch on and off at very high frequency. The output is smoothed by output capacitors. Because they are either on or off they are very efficient but the output...
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    Seial0 is USB serial. To go to hardware offboard...

    Seial0 is USB serial. To go to hardware offboard you need to use Serial1 and Serial2 ( or even user Serial3 ).
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    Looks like you have resistor connected to c2- on...

    Looks like you have resistor connected to c2- on the ADC, no resistor connected to SDA.

    Cable connections on the ADC are to C2- and SDA. You could have shifted the connections up/down one.

    The...
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    Hi bigpilot I have found a the same large...

    Hi bigpilot

    I have found a the same large display with I2C on the back.
    Probably better to use this with the attached I2C board as it also handles the LED backlighting.

    You can still use the...
  5. I think the easiest way to get you to understand...

    I think the easiest way to get you to understand what is happening is to ask you
    what
    setSyncProvider(getTeensy3Time); does?
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    Other alternatives are:-...

    Other alternatives are:-
    https://uk.banggood.com/5Pcs-DC-DC-12V-to-3_3V5V12V-Voltage-Converter-Multi-output-Power-Supply-Module-p-1146540.html?cur_warehouse=CN&rmmds=search...
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    I am going to be used some of these...

    I am going to be used some of these on a project I am putting together. The advantage of them, besides being cheap, is that they supply both 5v and 3.3v.
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    Have a look at this...

    Have a look at this.

    I just did as search for "teensy rtos" and that was one of the few things thrown up.
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    Ok, if you can't find the size of LCD that you...

    Ok, if you can't find the size of LCD that you want to use you can find i2c adaptor boards to convert it to i2c. Basically they use an 8 bit I/o expander to drive the LCD. Usually it's a pcf8574 I...
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    If you simply need 2x16 these can be found with...

    If you simply need 2x16 these can be found with i2c drive as well.
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    The advantage of the SX1509 (which is I2C) is...

    The advantage of the SX1509 (which is I2C) is that you can use some or all of the 16 I/O pins as a keypad scanner. The great thing about this chip is that it will do all the keyboard scanning by...
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    If you can squeeze in I2C then this...

    If you can squeeze in I2C then this gives you loads of I/O and an automatic keyboard scanner.

    The chip select for the SD card could come from the I2C breakout/expander thereby giving you one...
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    Banggood..but now charging a little bit for...

    Banggood..but now charging a little bit for shipping
    Amazon
    The Amazon one was difficult to find again, it depended upon which part of the AliExpress description I used.
    I am watching your...
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    Box on Banggood 26.43 with free shipping, 12.45...

    Box on Banggood 26.43 with free shipping, 12.45 with free shipping from Amazon.
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    Are you sure he's still listening after 3 1/2...

    Are you sure he's still listening after 3 1/2 years?
  16. RTCtime will be correct if you have a crystal and...

    RTCtime will be correct if you have a crystal and battery installed. If Crystal and battery installed all you need to do is update teensyTime from RTCtime as in TimeTeensy3.ino.

    IF NO RTC is...
  17. Each time a program is compiled and loaded to the...

    Each time a program is compiled and loaded to the teensy the date and time from the PC is embedded into the teensy SetUp/StartUp code.
    This code is run each time you apply power to your teensy. So,...
  18. Did you send any serial data to set the time to...

    Did you send any serial data to set the time to Teensy?
    If not
    if (Serial.available()) { will not be true and you will not go any further.
    If you did send code and it could be decoded...
  19. Methods to set/adjust the time are:- int hr,...

    Methods to set/adjust the time are:-


    int hr, min, sec, dy, mnth, tr

    setTime(t); //where t is in ms

    //or

    dy = 25;
  20. This is my understanding of using time and RTC on...

    This is my understanding of using time and RTC on Teensy.
    On the Teensy 3.1/3.2 if you want to use the RTC, then you must solder a crystal to the board.

    On any of the equipped RTC Teensies if you...
  21. You probably need to show your full code. There...

    You probably need to show your full code. There is no explanation of "nexSerial".
    Also put your code between Code tags. Use the # button above.
    Your code will then look like this (You must add...
  22. I think you are confused as to how the Teensy and...

    I think you are confused as to how the Teensy and RTC work.
    Look at this stream https://forum.pjrc.com/threads/63928-Teensy-TimeLib-question?highlight=teensy+rtc
    If you are using a Teensy 3.2 you...
  23. Look in the teensy libraries for TimeTeensy3.ino!!

    Look in the teensy libraries for TimeTeensy3.ino!!
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    Here is the file translated to english...thanks...

    Here is the file translated to english...thanks google translate.24433
  25. You may have got confused with naming the Serial...

    You may have got confused with naming the Serial Ports.
    The Rx/Tx pair on the top left, pins 0 and 1, are Serial1. On the Uno/Mega I suspect that the first Hardware Serial port is Serial2 whilst on...
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    Could you use a cheap ESP based board to get the...

    Could you use a cheap ESP based board to get the "Over Air" bit then send it to Teensy with serial?
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    Might be worth updating the web page. Are the...

    Might be worth updating the web page.
    Are the screws supplied or not? Two pictures show no screws, 1 picture shows screws.
    If screws not supplied then thread and minimum thread length should be...
  28. Where is your code? Include code and you might...

    Where is your code?
    Include code and you might get a reply!
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    Might not be relevant but have you seen this....

    Might not be relevant but have you seen this.? It does all your keyboard scanning for you.
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    It's not good to run time critical systems on...

    It's not good to run time critical systems on Windows since Windows itself does pre-emptive multi-tasking.
    I.e. it could be doing other things when you want it to deal with your input signal.
    ...
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    In order to load this into excel, copy the text...

    In order to load this into excel, copy the text and save it into a text file called excel.txt, for want of a name, anything will do.
    Start excel and create a new blank spreadsheet.
    Go to Data and...
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    Did you have any luck trying to find out why...

    Did you have any luck trying to find out why Teensy 4.0 freezes using Snooze and EEPROM.put?
  33. If you want to remove the Teensy, or the ESP,...

    If you want to remove the Teensy, or the ESP, take a pair of snips and gently cut the headers, pin by pin.
    Then when it is away from the PCB de-solder/remove each pin in turn.
    Attempting to remove...
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    Snooze has not been implemented for Teensy 4.1....

    Snooze has not been implemented for Teensy 4.1. Also I believe that for Teensy 4.0 wake from deep-sleep is via a Teensy Reset.
  35. Glad it worked out for you.

    Glad it worked out for you.
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    I suggest you use the Snooze library. Except for...

    I suggest you use the Snooze library. Except for the Teensy 4.0 it works quite well.
    It does not however support the Teensy 4.1.

    You should also bear in mind that the Snooze library KILLS EEPROM...
  37. What is the level shifter?

    What is the level shifter?
  38. Replies
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    Bear in mind that they are NOT bi-directional, on...

    Bear in mind that they are NOT bi-directional, on this chip one out and one back.
    That is ideal for what I want for Serial UART.

    I have seen circuitry where one chip provides bi-directional data...
  39. I haven't got any experience with SPI, but I...

    I haven't got any experience with SPI, but I would use simple UART serial.

    It's already done for you and would be so simple to get going.

    If you want handshaking then rts/cts is available to...
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    Just to complicate things further I found this...

    Just to complicate things further I found this.
    Looks good and quite cheap.
    No need for pullup/down or any other silly additions. I have ordered 5 from here.
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    Just found Eagle...

    Just found Eagle break out board for the LSF0204.
    You could get it made directly without modification.
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    After further searching I found this...

    After further searching I found this GitHub entry where someone has successfully used the 8 way device and has published a Kikad PCB design for it. Since you only want 4 ways, you could modify the...
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    I just found some more info which has led me to...

    I just found some more info which has led me to an idea for you.
    I will get back to it tomorrow.
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    I agree, but you said that the TSX0108E worked...

    I agree, but you said that the TSX0108E worked and the TSB0104 does not.
    The LSF010x mentioned above looks good to me. But then I went and bought a TSB0104, so what do I know!!
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    I've been looking at this problem all afternoon....

    I've been looking at this problem all afternoon. I will need to do uart 3.3v to 5v and back. I had purchased some TXB1040 and obviously they will not work.
    I have just found this LSF010x.
    Seems...
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    I think you need to use a TSX0104 part not a...

    I think you need to use a TSX0104 part not a TSB0104.
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    If you read the data sheet it does NOT state that...

    If you read the data sheet it does NOT state that pull up resistors are required, but if they are present they should be at least 50k due to the low output drive of the tsdx0104. Ie the device does...
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    Pictures of the assembled board on Tindy show a...

    Pictures of the assembled board on Tindy show a different form of potentiometer and judging by the PCB layout it is probably impossible to misalign that sort of pot.
    Examination of that type of pot...
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    Pictures of the assembled board on Tindy show a...

    Pictures of the assembled board on Tindy show a different form of potentiometer and judging by the PCB layout it is probably impossible to misalign that sort of pot.
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    The Nextion web site states that the I/O adaptor...

    The Nextion web site states that the I/O adaptor puts out 5v.
    The T4 only supports 3.3v devices. You may have "blown up" that input on the Teensy.
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