Changes

   <nowiki>'''U1''' - GPS - [https://www.trimble.com/embeddedsystems/copernicus2.aspx<Trimble 63530-50] - 12-channel GPS, 2x serial ports, 2.7-3.3VDC, SBAS, flash almanac/nowiki>ephemeris/location storage. (The -50 variant is probably a custom variant, and exact capabilities are unknown.)   

'''U3 ''' - [http://web.archive.org/web/20200903011648/https://datasheet.octopart.com/ST72F324J6T6-STMicroelectronics-datasheet-14047.pdf 72F324J6T6 - ST72324 - Main Microcontroller, ST7 series]- 32K Flash, 1K RAM, 5VDC, 10-bit ADC (16 inputs, muxed), 4x Timer, SPI, SCI, 32-bits total I/O

U5, U6 ''U4 - [http://web.archive.org/web/20200206204209/http://www.ti.com/lit/ds/symlink/lp2985.pdf LP2985](Marked Z252)''

U?? '''U5''', '''U6''' - [http://web.archive.org/web/2020012323464520200206204209/httpshttp://www.ti.com/lit/ds/symlink/tps72lp2985.pdf TPS7201QLP2985]- LDO - 2.8V?[[File:U?? - TPS7201Q.jpg|none|thumb|TPS7201Q on PCB]]U13 ''U7 - [http://web.archive.org/web/20200214104034/http:(Marked G4//www.ti.com/lit/ds/symlink/cd4040b.pdf CD4040BPW]905)''

U14 ''U8 - [http:(Marked G4//web.archive.org/web/20200214042837/http://www.ti.com/lit/ds/symlink/cd74hc4051.pdf CD74HC4051PWR]905)''

''U9 - (Marked F50)'' ''U10 - (Did not locate, maybe not placed?)'' ''U11 - (Marked 73RW, SOT-89 or similar) - Pre-amp for GPS ant? In GPS section can.'' ''U12 - (Marked G5/849)'' '''U13''' - [http://web.archive.org/web/20200214104034/http://www.ti.com/lit/ds/symlink/cd4040b.pdf CD4040BPW] - 12-stage Ripple-Carry Binary Counter/Divider '''U14''' - [http://web.archive.org/web/20200214042837/http://www.ti.com/lit/ds/symlink/cd74hc4051.pdf CD74HC4051PWR] - High-Speed CMOS Logic Analog Mux/Demux - 8:1 '''U15 ''' - [https://www.ti.com/lit/ds/symlink/lmc555.pdf TI LMC555CMM Family] per the ZC5 marking noted in datasheet. Pinout and footprint matches. '''U16''' - [http://web.archive.org/web/20190417163532/https://www.ti.com/lit/ds/symlink/lmv761.pdf LMV761MF] - Low Voltage Precision Comparator w/ Push-Pull Output ''U17 - (Marked Z252)'' ''U18 - (Did not locate, maybe not placed?)'' ''U19 - (Did not locate, maybe not placed?)'' ''U20 - (Marked H157/82.5; TSOP-8 or similar)'' '''U21''' - [http://web.archive.org/web/20190202204556/https://www.ti.com/lit/ds/symlink/cc1050.pdf CC1050] (back) - Low Power Transmitter - 300MHz-1000MHz, variable power, FSK '''U22''' - [http://web.archive.org/web/20200223104004/http://www.ti.com/lit/ds/symlink/tps791.pdf TPS79133DBUR] - 3.3V LDO - for U21 ''Unot_marked (23/24?) - (Marked W6K/W76) - RF Amp, similar to SKY65013-70LF (No designator; under TX can to bottom-right of U21.)'' '''U25''' - [http://web.archive.org/web/20200123234645/https://www.ti.com/lit/ds/symlink/tps72.pdf TPS7201Q] - Adj. 1.2-9.75V LDO - (Designator silkscreen is hard to read; 8-SOIC on bottom-right)[[File:U?? - TPS7201Q.jpg|none|thumb]]