stratum2 Drift One of my goals with the RTC Pi Hats was to have a more stable local frequency. This is useful when you can't reach your upstream clock. GPS modules lose signal from time
TCXO TCXO aging part 2 The previous data I have on aging covered 10 days, and now I want to come back to this now that more time has passed. This data is from the same Pi Hat
ntp TCXO RTC Hats: aging & RTC frequency I'm focusing on oscillator aging and RTC frequency in this post. See also: initial data, picture, other stratum 2 posts I've been letting these boards run to see what happens. My TCXO's aging
ntp TCXO RTC Hats: Initial data The TCXO RTC hats are collecting data. I'm focusing on the RTC part in this post. See also: other stratum 2 posts Required picture This hat is on an Odroid C2. The GPS
ntp TCXO RTC Hats My new stratum 2 NTP server hats arrived from Macrofab today! I have a few hand soldering things to do (32khz crystal and headers), and then I can start calibrating them.
time Temperature compensation Temperature effects are usually the largest source of frequency changes in clocks. So I have three temperature sensors on my test system. The sensors are: one built into the stm32 chip, a TMP36
time Frequency synchronization without phase in NTP I've been working on my high accuracy RTC project. Here's a picture of one of the two systems: Connections The TCXO devboard, BME280, and PCF RTC are all on the i2c bus. The
rtc RTC comparison Real Time Clocks I bought two high accuracy RTC (real time clock) modules and wanted to compare them. RTCs are useful for very low power clocks. They can run for years off of