If you're supplying Vin as 3v3, then there's nothing to worry about, as the modules won't have a way of stepping the voltage up. You might want to check if 3v3 is within the safe operating range of...
Type: Posts; User: Edward
If you're supplying Vin as 3v3, then there's nothing to worry about, as the modules won't have a way of stepping the voltage up. You might want to check if 3v3 is within the safe operating range of...
Yes, it's actually a reasonably elegant way of doing things.
You've got VDD_SNVS_IN which needs to be the first 3v3 (ish, it accepts something like 2-3.5 IIRC) line powered, but the hardware...
My first glance wasn't quite right.
USB_VBUS will power VDD_USB_CAP which through D1 will power VDD_SNVS_IN, which is the bank PMIC_ON_REQ is on, which is pulled up. So eventually the 5V line will...
It looks like some kind of input telling the processor that 3v3 is being supplied. I don't quite know offhand, but I imagine it's some kind of feature that prevents the teensy from trying to boot if...
Yeah, that's an idea, it's called fast edge slugging/spectrum limiting and it's basically used to remove the highest frequency components from a square wave to reduce the emissions. You can...
pjrc.com has schematics for all boards that might make some things like this easier to understand.
Suppling 3V3 directly to the teensy doesn't sound like a great idea to me. You'll have to look...
Nice, sounds like you have a solution.
The values of the resistors might have been important, high resistances are more susceptible to coupling in noise. I imagine given your description that it...
You need to do some sort of debugging to get some idea as to where the noise is coming from. Move things away from your setup, does the noise lessen? Do you still see the noise with your device...
I'm working on a design for a client, and we weren't sure if a teensy 4.1 would be able to run fast enough to handle everything we need. We have a bunch of time-sensitive outputs, as well as some...
filter.begin(100);
tells the filter function that you're update is 100Hz, so maybe you need to change this.
https://www.circuitbasics.com/basics-of-the-i2c-communication-protocol/
is a...
Hi Lopenguin,
Welcome to the forum. If you could post your top-level code
int wrappedInTagsLikeThis;
that would help. Look for the hash symbol at the top to get the tags. I presume...
This question is pretty vague, and it's impossible to estimate the lifetime of your project from your description.
Conformal coating is used to add an extra layer to assembled circuit boards, to...
The I2C, as Mark says, is set in silicone. The chips have dedicated hardware to run these busses that are only available on certain pins. If you mean to say you want to swap the pin locations you...
The answer to your main question :
The code that prints the key stroke is executed in bubbleSort(), line 119 counts is set to the value of median and the key is determined from that.
bubbleSort()...
I've not heard of using synchronous rectification with a H-bridge, but if I've understood, that would require opening the appropriate MOSFETs in Phase with the supply. Surely that would require two...
It's just a function of how the timers work out. A simple view of a PWM is a counter that counts up to number, turns on at zero, turns off at X, and resets at Y back to zero. Let say your counter can...
Hi smuscat,
I'm not sure I understand your project. A H-bridge can drive a motor in either direction, by turning on two out of four motors. For each pin of the DC motor, one MOSFET can connect...
I'd recommend Pogos, I think they'd be a lot less faff than trying to get a connector to fit. The issue I've had with connectors is getting them to line up on the SMD pads so they mate properly....
it depends on how neat a solution you're looking for.
If you're making a PCB to receive the teensy, you could place pogo pins to contact the pads.
Or you might have to look around and find a...
Yeah you can drop in the USB port you like, and then just connect it up directly to the teensy. The micro USB on the teensys is a little delicate IMO, so actually using a beefier option is a good...
it looks like you've derived your code from the example file multikey, which is fine, but I don't understand the use of lines 35-41 where you define the columns as outputs and the rows as input...
- The teensy lc is designed to be plugged straight into the usb, so J1 and U2 are a bit redundant. You should also crunch the numbers on how much 3v3 current you need, as while the regulator will...
Further to this, I've not found any such library and I'm definitely going to need something to do the job as I actually need to drop in a micro to change a single register at power on. The MDIO...
If it makes an audible sound when crashing, my first thought is brownout. Looking at the lidar datasheet, I can see the maximum current draw of the system might exceed 500mA, which for some USBs...
You've not really given enough information, if you post your code and a schematic someone might be able to help. I'm also not entirely sure of the error you're seeing, are you finding that the key...
My first question, is have you got your power connections in order? The program not working without the USB connection would suggest to me that there's a problem with that, I'm going to leave the...
Well, you could implement the change in frequency by changing the time base in the Timer3.Initalize(), though the resolution towards 1kHz would start to drop a bit. Changing phase again doable, but I...
Perhaps a better phrasing would have been: "what can be considered significant jitter on 1Hz PWM signal?"
It's about the same. Though when I put a bit of random code into the void loop (some...
Ok well that's grand.
I do have to ask, academically, what constitutes jitter on a 1Hz PWM signal? Looking at the above on the scope, I'm getting a jitter of about 500ns, for the off cycle. I'm also...
Hi All,
I'm designing an ethernet repeater, and I was looking at ways to debug it. I'm not planning on having anything manage the link, it's just going to be two phy's back to back with the RMII...
You'll need to find the pin from the datasheet, then look at the T4.0 schematic and see where it's connected to the teensy's header (assuming it is, and I wouldn't guarantee it), and then you'll need...
Logic levels are a product of the hardware and can't be changed, additionally, when you find the appropriate datasheet you'll be given a voltage below which a 0 is guaranteed and a voltage above...
Assuming you're using arduino ide
File->Examples->Ethernet
has a bunch of examples. Obviously, you're not interested in the UDP examples, the ones with UDP at the start of the name.
Here's a picture of V1!
24071
I've been working on a ~1kW adjustable load for work, because I'm doing a lot of PSU design, and it's getting awkward testing them. You can buy a big high power...
BriCom'sp suggestion of a buffer chip would work just fine, or the simplest thing would be to use a MOSFET. Assuming you're using this for some kind of slow switching rather than signalling. ...
Yes, your project seems possible :)
Presumably, you mean to store the samples on the card, and then unload them into memory at runtime. I guess it would be a case of comparing read speeds from the...
Ahh, I see. I didn't realise you were working with some software, so my comments about sending the data don't apply sadly.
If you want it to work with that reWASD, you'll need to find out what...
Oh wow, the answer's right there!
I confess I've yet to use a T4, which is why I've never seen this before. If you crack open pins_teensy.c in the T3 core files and compare it to pins_digital.c (as...
Well clearly the pullup resistor is changing something, what are the resistor values you're using for the divider compared to the internal pullup? Have you looked at the signal with and without this...
I've used maybe 15 adafruit libraries, and I've never had a problem with them getting started. Occasionally I've had to re-write my own to replace them where I've not been happy with the performance,...
Good that you've figured out a fix.
I wouldn't point the finger at the documentation when really this is a fix for your specific setup. Input_pullup adds, as you probably know, a pullup resistor...
I think it's worth pointing out that the teensy 3.5 and 3.2 are 5V tolerant, that means while they output 0-3V3, they won't be damaged by a 5V input on their digital pins. Think of it as an...
I think, particularly as a second-ever project,...
I think, particularly as a second-ever project, it might be a bit much, but don't think for one second you shouldn't give it a go if you fancy it!
The teensy-trellis combo is a big winner in my...
Well, I've been silly enough to be looking at .mp3 files (Serato uses .mp3 for its libraries) which is why the info about .wav doesn't match!
are you going to use the teensy for playback as...
I'd probably suggest teensy might not be the best platform for this. Assuming you're using DJ software such as Serato, you'd need to load the .wavs onto an SD, plug that in, get it to do your...
It probably doesn't matter, and my main answer would be "whatever is going to be easier", but seeing as I do love a circuit design discussion -
A) An advantage of using pull-ups (active low)...
So if you look at the teensy schematic (3.5 at least) you'll see AGND and GND are connected through a ferrite, and there's a circuit around this for the analog reference. Placing a pot between VDD...
I've just looked a bit deeper into the datasheet and it says the USB_VBUS inputs are "not part of the power-on sequence and may be powered at any time". So I was wrong, you can (as other's have...
This is great!
I've often thought about this sort of thing as much as I love the teensy's, I really don't care for 0.1" header as I'm almost always dropping them on a PCB. Personally I'd want a...
So with that charger you dont even need the switch, if you
cut the track
connect Vusb to the charger Vin pins
connect the battery to the charger Vbat pins
connect the charger Vout pins to the...