I wanted to make some very heart-felt, one-of-a-kind gifts for my parents. For my Mother, it was definately a 'one-of' clock design. I was not concerned with keeping
The PCA2131 is a CMOS real time clock (RTC) and calendar with an integrated temperature compensated crystal (Xtal) oscillator (TCXO) and a 32.768 kHz quartz crystal optimized for very high accuracy and ultra-low power consumption. The PCA2131 features: Automotive qualified AEC-Q100 grade 2 Oper...
DS323X is a low-cost, extremely accurate, I2C real-time clock(RTC) module. It can provide ±5%ppm accuracy (no more than 0.432s error) within the whole temperature range and lifespan, and is compatible with 2.5-5.5V wide voltage range. The current comsumption of the module is as low...
The code uses the Arduino framework. It has only one dependency, the Wire library for I2C communication. About Source code and circuit design for the Remarkably Accurate Quartz Clock, a timepiece with ±10 sec annual accuracy Resources Readme License MIT license Activity Stars 6 stars ...
The breathing volume per minute can be checked with the pump and a clock. It seems to fit even at high respiratory rate.Please let me know about your test results. Any errors in the calculation?In the meantime i build a second version with additional CO2 sensor. The results are similar ...
The PCF2131 is a CMOS real time clock (RTC) and calendar with an integrated temperature compensated crystal (Xtal) oscillator (TCXO) and a 32.768 kHz quartz crystal optimized for very high accuracy and ultra-low power consumption. The PCF2131 features...