properly planning out major upgradez

2026-07-24 20:43:59 -06:00
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+## for sure upgrades:
+1. Upgrade to Pi5 8GB
+   1. 
+2. GPS MODULE TIMEKEEPING
+   1.  new NEO-10 gps timekeeping one, one with a 3.3v battery input for hot/warm starts maybe the [139Euro NEO-F10T L1/L5/E5a Receiver](https://gnss.store/products/elt0184)* MAKE SURE YOUR ANTENNA PLUG MATCHES THIS FORMAT! NO SCREW ON MORE LIKE SMA attached
+   2. maybe get the canonical antenna/cable/adaptors off same site: 
+      1. (? not sure this is any better than my existing barrel antenna) [gps antenna](https://gnss.store/products/elt0140)
+      2. (need) [gps antenna adaptor](https://gnss.store/products/elt0179)
+      3. solder 3.3v lithium coincell battery/breakout to timekeeping gps (see datasheet)
+         1. for hot and warm starts when power is lost
+         2. to prevent pwoer loss of precision or accuracy
+      4. see datasheet
+3. PCB HAT
+   1. featuring
+      1. pps gpio pin input (from NEO-10 gps timekeeping)
+      2. 10mhz reference clock gpio pin input
+      3. UART gpio pins in/out (from NEO-10 gps timekeeping)
+      4. i2c pins for high precision RTC module
+         1. and 3.3v lithium coin batt
+   2. with NEO-10 gps module attached
+      1. room for 3.3v lithium coin batt on NEO-10 gps timekeeping
+      2. room for external antenna
+   3. (?) clock generator chips (Texas Instruments LMK04832 or Analog Devices ADF4351) plus programming figured out
+      1. these can take 10mhz/etc as input then multiply or divide the signal into a clean jitter free signal modified frequency output
+4. HIGH PRECISION REFERENCE OSCILLATOR SHIT ([gps disciplined 10mhz rubidium reference oscillator](https://www.aliexpress.us/item/3256811412964525.html))
+   1. options for adding external oscillator:
+      1. desolder pi4's normal crystal and input 10mhz reference pulses after high precision multiplying/dividing to the expected value, then soldered in. high precision pi native clock
+         1. crystal available internetally
+         2. would make pi4s ops far more consistant speed
+         3. no effect on pps accuracy
+      2. desolder gps timekeeping crystal and wire in 10mhz reference through high precision frequency multiplier/divider and soldered in
+         1. this will make the gps pps very very accurate
+         2. will let pi4 just operate off of the high quality pps signal
+      3. apply 10mhz reference clock to rpi x xtal 0,1 to get 10mhz signal inside pi (see pi4 datasheet/notes)
+         1. recalibrate chrony/gpsd/etc to base time off of this input
+            1. may require custom forks or other shenanigans
+      4. use high precision frequency multiplier/divider to get `10mhz reference into useable frequency for timekeeping, then input via x xtal 0,1 (see pi4 datasheet/notes)
+         1. then base chrony/gpsd/etc off of that clock
+   2. clock pulse generator? https://www.adafruit.com/product/2045
+      1. uses i2c and an internal precision ox to generate up to three clock signals
+      2. no clock input?
+   3. convert 10mhz ref clock into 54mhz clock for rpi4 and rpi5
+      1. Texas Instruments LMK04832 or Analog Devices ADF4351 programmed with a 5.4 frequency multiplier to convert 10mhz to 54mhz for rpi4+5 clock
+5. OUTPUT IMPROVEMENTS
+   1. remote hosted web apps (prolly node) that get goverened by grandfather clock over idk webrtc/websockets/mqtt/calling a page, whatever
+      1. goven universal beat time web app
+      2. govern a normal multi-tz grandmasterclock output web app
+6. PULSAR SHIT
+   1. will need to use google starmap thing to identify the roughs of where the milisecond pulsars are
+   2. 2+ RTL-SDR V4 s
+   3. 2+ LNA (Low Noise Amplifiers)
+      1. coax in and out
+      2. low noise < 0.5db
+      3. high gain > 20db
+   4. BPF (Bandpass Filter) to block strong out of band sdignasls
+   5. parabolic antennas (ali express)
+      1. high gain
+      2. 2.5-3 meter diamater
+      3. tuned to 420–440 MHz (70cm band) and/or 1420 MHz (21cm band).
+   6. wire to connect to RTL-SDR 4
+   7. tripod/mount/adjustment mount (look into)
+   8. maybe extra usb space