LMS-6 Radiosonde: Difference between revisions
Paul Rixon (talk | contribs) →Connectors: SENS1 mapped to endpoints |
Paul Rixon (talk | contribs) Analog Mux breakdown |
||
| Line 361: | Line 361: | ||
Sens 4 is know to be capacitive since it is listed as such on page 13 of the [https://web.archive.org/web/20200619153019/https://www.wmo.int/pages/prog/www/WMOCodes/WMO306_vI2/LatestVERSION/WMO306_vI2_CommonTable_en.pdf WMO Common Code Tables Document] | Sens 4 is know to be capacitive since it is listed as such on page 13 of the [https://web.archive.org/web/20200619153019/https://www.wmo.int/pages/prog/www/WMOCodes/WMO306_vI2/LatestVERSION/WMO306_vI2_CommonTable_en.pdf WMO Common Code Tables Document] | ||
== Test Points == | |||
TP58 - MUX in/out (U14 Pin 3) | |||
<br /> | |||
==Circuits== | ==Circuits== | ||
| Line 374: | Line 379: | ||
===Relative Humidity Circuit=== | ===Relative Humidity Circuit=== | ||
[[File:Relative Humidity Circuit Schematic.pdf|thumb|Relative Humidity Circuit Schematic]] | [[File:Relative Humidity Circuit Schematic.pdf|thumb|Relative Humidity Circuit Schematic]] | ||
U16 -Input also has a cap to ground not shown on the sketch.<br /> | U16 -Input also has a cap to ground not shown on the sketch. | ||
<br /> | |||
=== Analog Multiplexer === | |||
U14 is an 8-channel mux/demux. Four of the channels (A0-A3) go to SP1. (A4-A7 appear to go to SENS2-4, need to be traced) Pin 3 is the common in/out, and goes to R13 (560k) and R15 (47k). R15 goes to U15 Pin 7 (555 Reset), and R13 goes to U15 Pin 8 (555 Control.) <br /> | |||
==Modifications== | ==Modifications== | ||