rcarr
Senior Member

From the linked threads, this one is something you can try in software: https://forum.pjrc.com/threads/69717-High-gain-audio-amp-picks-up-noise-from-analogRead?p=303208&viewfull=1#post303208 You could read 1 of 5...

I don't see how it can not be connected unless that etch run has burnt open. You could check that by checking for 5 volts over on pin 1 of Encoder1. (But it would be much better if you check for etch continuity using...

The etch shows 5 volts going directly to pin 3, does it not? It doesn't even matter if the encoders were not plugged in, pin 3 will still see 5 volts.

The library returns negative numbers for any error, so I don't think one should be surprised about the values printed being negative - it just points to some kind of error, like Kurt says maybe SPI errors. Some...

Perhaps receiving with SPI slave mode with a hardware or software one-shot to recover the clock.

Water is not conductive unless it has impurities. My well water is very hard, and some water in the sink has about 100k ohms resistance between probes about 6 inches apart. You could measure your setup to see what...

The pinout is different CBE and EBC. This statement is nonsensical.

So the switch blocks the traffic for some reason, I would check logs/settings in the switch. Firewall settings. Improper network class chosen. Spanning tree decided the IP was on a different port. It...

The example code in the library shows some significant differences when using the T4, pin used and time in microseconds. /* FreqCount - Example with serial output * http://www.pjrc.com/teensy/td_libs_FreqCount.html...

Try removing AudioNoInterrupts(); from your loop. You need to let the audio processing happen in the background while you write the display.

The data sheet has the information to answer your question: IIH High-level input current VI = VCC 1 μA IIL Low-level input current VI = 0 −1 μA 1 micro ampere is a very small current, you will not need current...

I2C is relatively slow compared to modern processors. Adding to the issue is that the historical Arduino Wire library is somewhat brain dead in that it blocks during the end transaction function call while it writes...

Interesting thread. https://forum.pjrc.com/attachment.php?attachmentid=27831&d=1647280960 Since the circuit uses an external pullup, use of the internal pullup is redundant. I thought for sure we would discover...

A click and drag in the audio design tool and it writes the program for you. How many sine waves do you need? With 4 mixers fed into one mixer you would have your USB audio plus 15 sine waves all mixed together.

You can use two 1K resistors as a voltage divider to reduce 6.4 volts to 3.2 volts. Hopefully you haven't damaged pin 15 on your Teensy but you should keep that in mind as a possible future cause of problems. For...

You can use attachInterrupt, here is a simple explaination. https://forum.pjrc.com/threads/42800-Teensy-Interrupts-for-Dummies You can see in that example that you do not need to read what pin caused the interrupt...

Is "88" less than 10000?

I am not sure finding out why faulty code might work on T3.x and not T4 is worth any time. It is most likely due to speed and when Serial available becomes true. But here is a code review that my help with some...

How do you know it still runs in this ^ scenario was what I was questioning. You could try single shot triggered mode with your scope and try to catch the power up of your switching power supply.

Since the test program doesn't do anything, how do you know it still runs on battery? My initial thought was that some i/o pin(s) was powered up first and the Teensy entered a latch up state. Looking at the...

>>>How can I return the accumulate moved steps of Accelstepper to Encoder library side? You could make use of one or both of these functions that are in the encoder library. As you can see, they reset the absolute...

The 74HCT125 enables are active low, you would tie that to ground instead of +5 volts. Side effects of connecting switch 1,2,3 together puts the 10K and 22k resistors in parallel. You could just not use the 10K...

I would look for where you may be writing to a readonly audio buffer, for example maybe your allocate() function.

The problem at hand seems very much like servos. The servo library drives 12 ( I think ) servos with one timer without any jitter. There are differences in that servos are pulsed one at a time, and here you turn on...

Do the programs work without the level shifters using short wires for hookup? In reading the 1st post a few days ago my thoughts were that perhaps there are glitches on the signals or the slew rate is slow causing...

Yes you're correct and not I. You can reference analog reads using the digital ground. The digital and analog ground are connected on the Teensy with an inductor. Teensy schematic. Using the digital ground will...

If you interrupt on A falling, you can see that B will always be low. Only if there are encoder bounces will you have something different.