feeling/seatalk-autopilot-remote-control
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AK-Homberger
2020-11-28 10:27:10 +01:00
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@@ -36,7 +36,7 @@ MFDs with Lighthose II will react on the Seatalk alarm function with a short bee
# Problem with some 74LS07 variants
It seems that there are different types of 74LS07 devices available with slightly different electrical charcteristics. See issue "R3 wrong value?" for details.
If you get a "Send Error" problem (with 12 Volt connected) then the solution is to lower the value of R3. It is important to check two voltages. With Satalk signal line high (12 Volt) the voltage on pin 3 of 74LS07 (or alternatively on cathode of D1, which is easier to measure) should be above 2 Volt. When Seatalk pulled to GND (low) the voltage on pin3 should be less than 0.8 Volt.
If you get a "Send Error" problem (with 12 Volt connected) then the solution is to lower the value of R3. It is important to check two voltages. With Satalk signal line high (12 Volt) the voltage on pin 3 of 74LS07 (or alternatively on cathode of D1, which is easier to measure) should be above 2 Volt. When Seatalk pulled to GND (low) the voltage on pin 3 should be less than 0.8 Volt.
# Software
@@ -106,7 +106,7 @@ Remote Control (KeyFob): [Link](https://www.amazon.de/XCSOURCE-Elektrische-Univ
# Updates:
- Version 1.4 - 28.11.20: Changed R2 and R3 back to 68 KOhm / 27 kOhm.
- Version 1.4 - 28.11.20: Changed R2 and R3 back to 68 KOhm / 27 kOhm. 6.8 KOhm would impact the Seatalk high voltage level too much.
- Version 1.4 - 27.11.20: Changed R2 and R3 to 6.8 KOhm to eliminate problems with some 74LS07 devices (see issue "R3 wrong value?" for details).
- Version 1.4 - 27.07.20: Use of millis() funtion to avoid delay() and timer counter in loop(). Improved detection of 433MHz keys.
- Version 1.3 - 13.12.19: Added definition for certain OLED displays that require this to work properly.