| 摘要 |
<p>An optional security system for monitoring door opening is designed to be plugged into the main board of a slot machine without any change of hardware or addition of extra switches. This security system allows time stamping of any access to the machine interior and will operate while the machine is powered down. Standard and optional security is designed so that when the optional security module is added it can share the same sensors as the standard system. The normal security system does not prevent the security module functioning when the power is off. Ideally, a security module can be plugged into a machine and take over or add the new security features. The isolation between the main board and the security system is achieved by the use of schottky diodes. When operating from battery power, the security subsystem remains in a low power drain 'sleep' state for the majority of the time, 'waking up' periodically to check the door switches and then going to sleep again.</p> |
