ckahlo

Hi @blahfoo, we're suffering from the same problems. We're using Teensy 4.1 on sounding rocket experiments (DLR MAPHEUS). So, when the payload is at the tower and "radio silence" is active (motor arming, etc.) we need a backup for some of the...

I have recently run into this problem too. What I have found is among the 5 teensy 4.0's I have, the power consumption for the rtc varies wildly. This is measured with no external components for 5 different teensy 4.0's: 2x 92uA, 84uA, 46uA, 27uA...

More on getting the standby (xtal RTC only) current down, and a question (anybody listening to this thread? :) Currently I'm using the same large 3.6V lithium (Tadrian TL-4902 non-rechargeable) battery, but with two silicon diode drops in series...

One thing I notice is that the T4.1 schematic shows two Shottkey diodes to supply the standby power, and if the 5V power in is on, this will pick up the current if the battery voltage is below ~3.1V. So, if I put a silicon diode voltage drop...

More on this problem, I'm running a T4.1 with a largish 3.6V lithium battery into the Vbat pin. I was surprised to see an immediate voltage drop on the battery when turning on the 5V power, and corresponding battery voltage increase with the...

Indeed, the hardware we get really depends on what NXP (or perhaps other microcontroller manufacturers) design into their chips. I have no control over this. In the past I've had conversations with people at NXP, especially expressing desire...

Given Paul doesn't design the actual microprocessor within the Teensy, he is dependent on the chips that are designed by the microprocessor companies. Given the newer chips no longer have 5 volt tolerance, Paul can't magically make the future...