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Faulty Batch of Teensy 3.5 Units
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Faulty Batch of Teensy 3.5 Units

by Rbowyer on Wed May 23, 2018 3:50 am

We have recently ordered 20 Teensy 3.5 Units in the same order for use in our school robotics program. Within a ridiculously short period of time a large quantity have experienced debilitating issues. We have been utilizing your technology for years, including past orders of Teensy 3.5 units which we had no issues with. Since such a vast quantity from the same batch have experienced issues we are inquiring about the possibility of the distribution of a faulty batch in our order.

Any response would be greatly appreciated as we wish to continue using your company as our supplier.

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Re: Faulty Batch of Teensy 3.5 Units

by franklin97355 on Wed May 23, 2018 2:20 pm

Out of the 20 how many have failed and what are the symptoms?

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Re: Faulty Batch of Teensy 3.5 Units

by adafruit2 on Wed May 23, 2018 2:31 pm

That's unusual, have you tried contacting pjrc.com? we dont remove or tweak or use the boards before sale

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Re: Faulty Batch of Teensy 3.5 Units

by Rbowyer on Thu May 24, 2018 1:54 am

Thank you for your responses,

So far, out of the 20, 12 have become unusable. The symptoms include and are not present in each: Pads that are incredibly fragile, coming off with little to no force; drawing no current and subsequently not turning on; drawing a high current, consistent with symptoms of running too high of a voltage through it even though the max voltage we have delivered has been 3.3v through VIN and 5v through USB; and not appearing to be connected with over USB.

I have not contacted pjrc.com yet, would this be the next logical step in finding a solution?

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Re: Faulty Batch of Teensy 3.5 Units

by franklin97355 on Thu May 24, 2018 2:34 am

Yes, they are the manufacturer and designer.

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