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Anomalie #215

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Evolution #214: Convert the whole security block to use only -12/+12 (no GND/5V anymore)

Security fan is currently progressively started

Added by François Cerbelle over 4 years ago. Updated over 4 years ago.

Status:
Résolu
Priority:
Normal
Assignee:
-
Target version:
1.1
Start date:
07/03/2020
Due date:
% Done:

100%

Estimated time:
1:00 h
Spent time:
1:00 h

Description

- A comparator LM311 or LM393 to avoid progressive ON/OFF of the brushless fan. To be inserted between U1A/1 and Q1/2.
- Replace Q1 with a darlington ? (TIP120) as suggested by René Lefebvre and Didier Badez
- insert a Zener before or after R3 as suggested by Aurélien Léconte. Probably a little bit over Q1 Vbe threshold

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