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This is unlikely. Because it happens regularly on 5 different devices. The battery is connected to the cable by welding, and to Teensy 4.1 by soldering without mechanical contacts. Those devices that have a GPS receiver, after long periods of time, restore the RTC through it. Those that do not...

Indeed, I did not conduct a "clean" experiment. I measured the voltage with different devices. This is most likely a mistake. Now I measured the consumption current, it is about 29 μA. With such consumption, the CR123a battery should lose only 8.5% of its capacity in six months. So, after all...

I measured the voltage on the RTC battery with one channel of the oscilloscope. With the other channel I monitored the supply voltage of 3.3 V during the normal switching on of the device. The supply voltage increased in a smooth exponential. I did the same measurements after reprogramming the...

Thanks Mark for the advice on setting the time. I also have to set the date. This is a much more elegant solution than mine. I'll gladly use it. Also thanks to jmarsh for the advice. Now I'll definitely switch to an external RTC. However, I don't understand at all what the battery has to do...

I have at least 5 devices and all of them have this problem. Accuracy of several minutes is practically not scary, but the RTC completely loses settings. At the same time, before switching on, I check the voltage on the battery, everything is normal there and with a large reserve (3-3.1 V). I...

Hello everyone! For several years now I have not been able to solve the problem of the loss of the current time by the real-time clock built into Teensyy 4.1. In those devices that are equipped with a GPS receiver, I correct the time according to the receiver. As soon as it is determined...

Hi Paul. An attempt to work through the I2C bus was also unsuccessful. Here is the connection diagram.

This is a schematic diagram in PDF format. I think that the SPI port cannot be connected to other pins because the processor does not know them.

This is cirquit.

Apparently this is impossible? Or am I wrong?

Several projects with accelerometers for Arduino NANO and TEENSY 4.1 work well for me. All examples from the SparkFun_ADXL345 and Adafruit_ADXL345_U.h libraries work perfectly. But now there is a need to connect this accelerometer to Teensy2.0. Nothing works. The processor doesn't see it. The...

Good day. There are thousands of such implementations. It is important to know the power requirements of consumers and remember that it is not recommended to take more than 0.5 A from the port. Maximum ripple, Average and maximum current consumption, time diagram of approximate current...

Good day everyone. First, I want to thank the support for the help. Now my previous project Datalogger receives information at a speed of 5 Mbps, processes and stores the data. That's great!!! Now a new challenge. I'm not a fan of ESP for reliability reasons. And I want to solve the following...

The error was in Teensyduino's installation. Now everything works fine and the write speed to the SD card is high. Super!!

I cannot understand the reason. After removing Arduino IDE and re-installing version 1.8.13. With the subsequent installation of Teensyduino 1.54. half of the libraries were missing, I had to install them manually, but some libraries stopped working. For example, the example of TimeTeensy3...

Some problems with the SD card. I first purchased Teens 4.1 from you and tried to work with it. Deep respect for authors. That's great. In a short time, I solved the problem of creating a datalogger for an underground radar. There is a large stream on the serial port. About 200 kilobytes per...

I first purchased Teens 4.1 from you and tried to work with it. Deep respect for authors. That's great. In a short time, I solved the problem of creating a datalogger for an underground radar. There is a large stream on the serial port. About 200 kilobytes per second at an exchange rate of 5...