General_Hex

@AndyA Thank you for the feedback we are looking into those points now. Is it possible for you to recommend a value for the capacitors as we are unsure as to what value(s) would suffice? Regards, Ryan Beikrasouli

Hi all, Thank you very much @BillFM for your advice on our colour sensor PCB, we made the changes you said and ordered them. We received and tested them recently and they work beautifully. Today we also finished designing our "Main" PCB so it...

Hi Everyone, An update on how the competition this weekend went: After a difficult competition our team was successful in becoming the State champions and earning our place in the national competition. However some things to note with the...

On this note, we have finished one of our two PCBs and the image of the PCB and the schematic are below: For context this is a secondary PCB which includes a Raspberry pi pico, 16 TCRT 5000 colour sensors and 1 multiplexer. The purpose of this...

To answer your first question no, after burning the first teensy months ago and doing extensive research on why it could have happened one of the things I learned was to never power the teensy with the computer and the power source at the same...

To be honest I wish I was because then we would know the problem. However no, I am not using the FM Signal Output wire as currently we do not have a use for it so it is just tucked away and not plugged into anything. We are only using the Ground...

I have already put the ultra fast diodes on the motors too in parallel. I will buy a 5V6 Zener diode then and replace my fuse with that. As for the resistors on the IO pins since I do not want to have to solder the wires to the resistors to be...

Ok that makes sense, should i replace my current fuse and ultra fast diode that I have placed between the 5V line and the VIN pin of the teensy with 1 zener diode or is there no need for a zener diode with those two or should i add the zener...

To answer your first question yes, we are using a 12V battery as our main power supply. my question is that by this do you mean that there is no point in me implementing this circuit or that it will still protect the teensy just in more rare...

I know they are online however I need them in store as I need them tomorrow and there is no stores which offer those specific diodes in store. I also have the same issue with the 200mH inductor however I believe that value to be quite high given...

General: Answers to your questions: D1 is a Transzorb and has a voltage rating similar to a Zener diode, except it is super fast, will clamp any over voltage in about 1 nanosecond. L1 is an inductor, which is part of the Pi filter (Or low...

Also I cannot find the TSV diode or the 200mH inhibitor (does the inhibitor have to be 200mH because I cannot find any that big, I can only find maximum 6200uH RF Inductor) anywhere in store near me. Is there any substitute I can use for these...

General: This circuit will protect your Teensy from just about anything the outside world can throw at it. It was originally designed to protect military circuits from EMP developed from Nuclear weapons. I have been using it on sensitive...

Thank you SOOO MUCH @sbfreddie. can you please outline what those components are specifically so I do not accidentally mix anything up and so I can use the exact components. main questions are: what type of diode is D1? would an ultra fast or...

I understand that electronics is complicated and I apologise again for not being able to better describe or show my circuit. Thank you to everyone who has tried to help me this week your time and advice is greatly appreciated. While there is not...

I understand that but what I meant was that for the resistor to be connected in series it means that one end needs to connect to the IO pin of the teensy and the other end needs to connect to the input/output wire correct? Because my issue is...

Yes, that DCDC converter is probably fine. While not documented on that site, it uses LM2596 which is a good quality part. Though whether it's a genuine TI part or leftover inventory from before TI acquired National Semicondutor (the marking is...

Apologies @PaulStoffregen, here is the link to the exact voltage step down we are using and the data sheet is on this website too under "downloads" : Voltage Step Down There is nothing in the data sheet that states that a diode or anything is...

@BillFM The motors do not have a motor controller because we specifically bought brushless DC motors with high torque and high enough RPM that also came with a built in encoder. However here is the link to the motors with the built in encoder we...

That's ok, I certainly understand as my main role is the software developer of my team however the work of having to create the preliminary circuits before we can get our PCBs has fallen on my shoulders and I am trying the best I can given that I...

so its not possible that the voltage step down it outputting too much current? Because that was the only other reason I could think of which would cause the teensy to burn.

I tried copy and pasting the images but it would get stuck on "uploading" and never upload despite the image only being 1.5mb. However as @AndyA said, the images aren't that helpful as the wires and circuit are a mess and if anything it is more...

To be honest if you have 1 day left then there isn't much you can do other than make sure all the wires are in securely and hope. Given that birds nest of wires I'd be afraid of making any change this close to the final date. For future projects...

In the future we are designing PCBs so there will be little to no wires. We almost finished designing them but we just ran out of time and they would not arrive in time. we are assembling a new robot so I will have to remake the circuit anyways...

Hi all, Please try to view the images above soon because tomorrow is the last day I have to set up our robot and then out competition is on Saturday (note that I am in Perth WA so the timezone is different). We currently only have 1 teensy left...

Diodes "switch on" when the forward voltage is over a certain threshold, typically around 0.6V, but like anything that has to deal with real world physics they can't change state instantly. It takes a while for a protection diode to start to...

Hi all, I have taken the photos as requested however the forum is not allowing me to upload them strangely despite them being around 1-2mb. But I have put all of the photos I have taken of my circuit in this link on Google Drive. In the photos...

Yeah I understand thank you. If possible can you please tell me generic preventative measures I can quickly implement so that the teensy is protected even in the case of malfunction or error. i.e Would these three steps help: and which of...

Thank you that makes more sense about what they meant about the speed of diodes. As for the IO lines being close to the motors we have been forced to fit this entire circuit onto one breadboard so spacing is difficult however the 12V power line...

I understand and I will be sure to send you full photos of our circuit layout tomorrow. However it is highly "messy" with jumper wires running everywhere so hopefully the text I put above will help decrypt what is going on with the circuit when I...

I found these diodes which are available in a store near by which are classified as "Ultra fast diodes" are any of these good for my situation: Z0030 (100V UF4002 Ultra Fast Diode) Z0032 (400V UF4004 Ultra Fast Diode) Z0031 (200V UF4003 Ultra...

If by software you mean the code we uploaded to the teensy then no the code is not the issue crashing. Also the issue is I cannot run that crash report code on the teensy because the teensy is no longer detected by my computer in ArduinoIDE so I...

I'm a little confused about what you mean by the "speed" of the diode. Currently we have these diodes and we have a lot of these so would these work: 1N4004 400V 1A DO41 As for diagrams and photos I am currently unable to now but tomorrow...

Building on this: (Yes this has been copied and pasted from my other thread because I was told to continue the discussion here) Hi, Within the past two days I have burned two teensy 4.1s with a third one being burned months ago. The one burned...

Appologies but this thread is different because in my other thread my intention was to solve the issue with the teensy 4.1 flashing and in this thread I am trying to solve a seperate issue of ensuring no more teensys are burned (i.e how to ensure...

Hi, Within the past two days I have burned two teensy 4.1s with a third one being burned months ago. The one burned ages ago I know why they burned (because a pin received more than 3V) however the two that were burned within the last two days I...

Yes I know and we did but again after releasing it, it stayed stable for 40 seconds and then went back to flashing 9 times and according to links above it should turn off the red LED and start blinking it's orange LED which it did not do.

Thank you for understanding and trying to assist me. We do not own an oscilloscope and I doubt we would be able to get one in time if we tried. However despite not having the robot we do have the troublesome teensy so we can do any tests/fixes...

Tried that and again the LED goes stable red for a while but then it goes back to flashing after about 40 seconds.

Again as stated previously I do not currently have the robot with me so I would be unable to test that and I do have a multimeter I could use if that is the same as an oscilloscope. I have also previously ensured that the voltage step down is...

We are trying to do the 15 second reset again, after 15 seconds a steady red LED is turned on. However after waiting for a while the LED goes back to flashing 9 times and does not turn off nor does the orange LED flash like it says it should in...

No, the motors all have their own built in controllers. the Motors themselves are powered directly by the 12V battery and the only way they are connected to the teensy in any way is the PWM and direction wires they each have (and of course all...

Also I just realised that during the few minutes I was panicking about what happened to the teensy I tried doing the 15 second reset then the LED turned stable red but I kept trying to connect and nothing would work so I unplugged it however...

I sadly do not have the robot with me right now and we do not have a schematic as we are currently just using breadboards as we planned to finish designing and creating our PCBs in the future. However I can explain what we do have connected to...

Hi, I was using my Teensy 4.1 with my robot project today when all of a sudden in the middle of running the robot stopped and the teensy started flashing. I thought it strange but as the code was no longer running I turned off the power supply...