Re: KX3 / KXBC3 NiMH Battery Charger and Real-Time Clock
Posted by
Joe Stone (KF5WBO) on
May 05, 2016; 9:12pm
URL: http://elecraft.85.s1.nabble.com/KX3-KXBC3-NiMH-Battery-Charger-and-Real-Time-Clock-tp7617153p7617196.html
wayne burdick wrote
Hi Joe,
The KXBC3 uses a nano-power PIC MCU running our own firmware, not a real-time-clock IC. This MCU provides both the clock and charge-controller functions.
It would be possible to add support for date readout in the future. This is the first such request, but it's now on the wish-list.
73,
Wayne
N6KR
Thank you for the reply, Wayne. And thank you for supporting the broader Elecraft community.
Let's start by adding basic logging support to the PX3 wish-list. I'm simply trying to understand where the PX3 will get the date and time from. The KX3 / KXBC3 is one option. I did receive one report (privately) suggesting the KXBC3 loses up to three hours per month. I haven't verified the accuracy of the KXBC3 myself. Worst case, we periodically reset the date / time. Of course, not everyone has a KXBC3.
I'm assuming PX3 logging support will require a new memory or microSD (preferred) "option board" connected via the existing PX3 40-pin SPI and I2C expansion interface. It may make more sense to add a real-time clock IC with a lithium coin cell battery back-up to the new PX3 option board, rather than relying on the KX3 / KXBC3 for the date and time.
You gave us PX3 keyboard and message / macro support for free ... a $150 value. Do yourself a favor ... build a PX3 microSD / real-time clock option board for peanuts and sell it for $79.95. Cha-ching. We'll install it ourselves. Sell a new PX3 left side panel with an added microSD slot for $26.39. Cha-ching, cha-ching. And, keep pace with that new Japanese SDR in the area of microSD / logging.
Joe
KF5WBO