I've seen a few posts from a couple years ago but nothing with much info. I've seen some projects using an Arduino and this ethercat shield:
https://www.bausano.net/en/hardware/easycat.html
It seems like it would be a hell of alot cheaper and...
Sorry, I am pretty sure there will likely not be support to run on Arduino 1.0.5 with any version of Teensyduino that supports the Teensy 4.x boards.
Sorry. I personally have no idea what the Real Time System Custom USB is or was? Maybe others...
Pin #24 and #25 during programming receive some level of 3.3V - enough to light an LED DIM or Bright. Not seen on other edge pins.
That has been noted if not documented and needs to be considered in use of those pins.
AFAIK: This is the first...
Yes, I just got back from testing, and when pin 25 is held to ground, it cannot be programmed when the unit is locked.
I haven't yet tested to see if that will affect my application, as I am using pin 25 as an address line. Does anyone think...
Thank you for your advice, impossible to make a dividing bridge with resistors (too much parasite), I have a -40 dB attenuator but I think the level is a little loud for a microphone input (generally around -60 dB). Probably I'll enter the signal...
Considered adding verbose - but easy to repro ...
No GND<>25 - all is well locked T_4.1
Put GND==25 and push Button with CLEARED verbose [and noted RED LED never visibly lights]:
13:19:16.320 (ports 2): WM_DEVICECHANGE DBT_DEVICEREMOVECOMPLETE...
Most function generators output with a fairly low impedance which can easily drive the input's 2.2K resistor. But to get a signal with low enough amplitude, you might need to add a resistor divider to decrease the signal level.
Indeed the 0.1uF...
I was also going to ask about those pins.
Maybe I misunderstood the description "Attempting to download the blink program at this point or any other for that matter, fails, the USB port drops out" to mean the code begins to load but fails after...
Just did a quick test regarding pins 24 and 25 on Locked T_4.1 that are pulled high a little (25) or more fully (24) - lighting an LED on those pins.
If Pin #25 is tied to GND the Locked T_4.1 cannot be programmed. The RED LED never lights and...
Teensy is assembled in Oregon, USA. Final testing and firmware programming is done in Oregon, USA.
The 2 microcontroller chips both have China as country of origin.
NDAA compliance is easy, since Teensy isn't telecommunications or video...
Thank you for this precision but my frequency generator does not generate an offset. Now the microphones need bias for their operation, and my generator doesn't need this bias voltage. I'm not sure of my connection.
Okay, I was able to find the gist of the issue, although I cannot fully explain it. Bottom line is, once it is set to locked it can no longer be programmed while the Teensy is in the circuit. (Mind you, that is our circuit, so that is probably...
Something is going wrong here, but your Teensy is almost certainly not bricked.
I want to help, but it is difficult to get a clear picture of what's really happening because your description of the problem is heavy on interpretation / analysis...
I'm a beginner, working on a project converting an old set of organ pedals into a standalone bass synth. Between the audio design tool and looking around at other projects (I found Notes and Volts videos particularly helpful,) I've managed to...
That's a coupling capacitor. The 2.22uF below it is the decoupling cap. The connector is DC-linked to MICBIAS output, which is why an external coupling capacitor needs to be used if the source doesn't handle a DC-offset.
Hi Milesg,
Thank you for the fast reply. I really appreciate your help.
I did read that you changed it to Serial5 but I cannot figure out how it can be done. Can you provide help over here ?
Meanwhile I'll download the program and try to...
Hi Pedro,
I'm no expert either, but my project did end up working out nicely. A big help in troubleshooting was to have a known-good modbus program on my PC to test my Teensy code. I used QModMaster...
We have purchased a large quantity of Lockable Teensy 4.1 units. Initially we have set the encryption feature on these units by using the "Fuse Write Sketch" program and proceeded to download and test our application. All worked great. Now, it...
I have used the Linear Technology LTC1867L in several projects over the last decade.
ltc1863l-1867l.pdf
This chip has been around since about 2005, but is still in stock at Digi-Key for about $20 at quantity 25.
The LTC1867 runs off 5V, but...
Hello,
I have a task of migrating a project from Teensy 3.0 to Teensy 4.0 and unfortunately I could no longer use the same IDE 1.0.5 for Teensy 4.0 (Or is there actually a way to add Teensy 4.0 board to this IDE version). I would like to add the...
We are looking at a US contract (non defense) but they want NDAA compliance which has requirements around computing sources. Key questions are around the overall PCB build, and as well as the two processors on the Teensy 4.1
DrM:
Aaaw the good old days at Hughes Santa Barbara Research Center. This design brings me back to the great times that I had designing and working with CCD arrays (IR) forty years ago.
Keep up the good work!
Regards,
Ed
Regarding a pull request: I am not sure how to proceed. I changed a lot compared to the original code like the update to the usb2 specification. Unfortunatley it is not possible for me to test it with many different hosts and it would therefore...
Hi all,
First time commenting/posting in this forum.
I am trying to build an ModbusEthernet communication between teensy 4.1 as a Server and a host computer as a Client. The shield I got for the teensy is the following one...
Hi,
GBF (I mean frequency generator), I've just enter a sinusoidal adjustable in amplitude, gain and frequency. I don't have any offset on my signal and
according to the diagram there is already a decoupling capacitor 0.1µF on the board, right ...
I'm not sure I understand your issue but the delay(1000) will probably not work too well.
Try this example non-blocking loop().
// IntervalTimer myTimer; // NOT IN USE HERE
const byte interruptPin = 2; //button
volatile unsigned long blinkCount...
Glad you got it working. :)
Be careful about Teensy's power pins accidentally touching the metal chassis of your laptop. In theory everything should have over-current protection. In practice, best not to put that to the test.
Hi Paul, thank you very much for the reply. I was able to give it a good cleaning with the available resources I had at hand. Never knew an orange light can give me so much joy ! Back to the tutorials now
I'm not sure I understand your issue but the delay(1000) will probably not work too well.
Try this example non-blocking loop().
// IntervalTimer myTimer; // NOT IN USE HERE
const byte interruptPin = 2; //button
volatile unsigned long blinkCount...
I'm looking for a non-iso CAN FD example. I have a Teensy 4.1 working as CAN FD on CAN3 and am to receive a 64 byte message sent by a TCAN4550. When sending a 64 byte message with the Teensy it only outputs 8 bytes even though the msg.len to 64...
Hi Paul,
I've been a longtime visitor to the Teensy forum pages when I needed help or inspiration to build up my VoiceBot project. VoiceBot is an easy-to-use and somewhat cheeky fluency-builder for second language learners, independent of...
I have recently been working on a SF2 reader written in c++
to work together with AudioSynthWavetable
https://github.com/manicken/sf2Reader
+ a C# testing software
https://github.com/manicken/sf2ReaderTester
While I have learned about the SF2...
The Hamamatus SPI board is up and running! The design files include the sensor board and a mating carrier for a Teensy 4.0
Here is a link to the repo.
https://github.com/drmcnelson/S11639-01-Linear-CCD-PCB-and-Code
This is a self contained...
Thank you, I appreciate the time spent on helping out!
1. The signal will be attuned, but the target is 5-15kW amplifiers, so peak to peak voltages of up to 400-500 volts. Plan is to use a voltage divider to get the levels down to around 3vpp...
Too bad that we don't have LDF file for the HVH50. Saw your request for info at the peak-system forum as well...
I agree.
Frames {
HV_He_01: 28, Controller, 4 {
KL_HV_PTC_soll, 0 ;
KL_PTC_ein, 8 ;
}
This tells me that the bit...
You'll need a DC-blocking cap as the microphone pads are designed for an electret capsule. I'm not sure what you mean by a GBF, gain before feedback is a measurement.
Is it possible to use a UART's RX for receiving serial data but use the TX for PWM output? I'm specifically looking at TX6 which is spec'd as PWM capable. I'm hoping that the TX line (#24 in this case) can be set with analogWrite after...
All,
I'm looking to expand my analog read pins by using and external ADC chip. Main requirements are
8 analog inputs
I2C, SPI, or even analogRead for the communication to the MCU
minimum of 12 bit resolution
must have Teensy library support...
I tried the SPI.beginTransaction with no success. The only think that worked was to power the MCP with 5V (control lines in 3v3). It's weird because the datasheet states an min operating voltage of 2.7V and found a post around (not here) of a guy...