From b6c9c5de06f759fdeb1f720edfdd218167ac0eb9 Mon Sep 17 00:00:00 2001 From: Mateusz Lubecki Date: Wed, 25 Sep 2019 07:41:00 +0200 Subject: [PATCH] hardware readme --- HARDWARE-README | 14 ++++++++++++-- 1 file changed, 12 insertions(+), 2 deletions(-) diff --git a/HARDWARE-README b/HARDWARE-README index 09b589e..5529bf4 100644 --- a/HARDWARE-README +++ b/HARDWARE-README @@ -23,6 +23,7 @@ long experience with many different stations -> Separate watchdog IC. -> Optional Radiometrix BiM1H 500mW VHF transceiver tuned on 144.800MHz. -> The PCB mechanical design which fits into standard Mikrotik RB411 case. + -> Supplied from single +12V...14V5 DC source using standard DC barrel jack. The main problem observed during long experience with meteo stations is RF feedback. Most sensors (like temperature, wind and humidity) needs to be @@ -86,7 +87,16 @@ The connector itself repeats the Tapr (Muel) TNC-2 pinout which goes as below: Pin 5 - AF from TNC to Radio Pin 7 - AGND -7. JUMPERS (Sketch not to scale!) +7. Adjusting audio levels +The ParaTNC controller has two trimpots mounted on PCB which may be used to +tune the level of audio coming from/to the radio. + +The trimpot located close to the microcontroller is used to set the output signal +level. The another one which is near right isolation transformer changes the +input level and it is hooked up between the primary winding and DC-blocking +electrolytic + +8. JUMPERS (Sketch not to scale!) ------------------------------------------------------------------------------- | | | JP1 MS5611 sensor | @@ -132,7 +142,7 @@ DHT22 - .1' connector for DHT22 humidity sensor ========== -8. CHOOSING BETWEEN RS485 AND RS232 +9. CHOOSING BETWEEN RS485 AND RS232 ParaTNC controller has connectors for both 485 and 232 variant of RS standard. This doesn't automatically means that ParaTNC has two separate serial ports, this is still the same serial port from the microcontroller which just may