DETECTING CIRCUIT FOR FANS

摘要

A detecting circuit for a number of fans includes a connector module and a controller. The connector module includes a number of connectors. Each connector outputs a first signal or a second signal depending on the connection or non-connection to a fan. The controller receives a speed signal of the fan upon receiving the first signal which indicates a connected state.

主权项

1. A detecting circuit, comprise:
a connector module comprising a plurality of connectors, wherein each of the connectors outputs a logic-low level state signal upon a condition that the connector is connected to a fan, each of the connectors outputs a logic-high level state signal upon condition that the connector is not connected to a fan; and a controller, wherein the controller does not receive a speed signal from the connector upon receiving the low-voltage state signal of the connector, and receives the speed signal from the connector upon receiving the high-voltage state signal from the connector.