This kit ATM Machine Gate Security System is an effort to design a security system for the ATM machine gates or ATM machine. The arrangement requires proper implantation to work. If someone forcibly opens the gate or try to move the ATM machine from its position it will blow an alarm. The circuit uses a no switch which has to parts. If the two parts are in contact there is continuity else the continuity is broken. So, one unit can be installed on the bottom (ATM machine) and the other on the floor (one above other) to ensure continuity. Any disturbance to ATM machine will remove the contact and this act as a signal input for the audio Amplifier to generate an alarm via a speaker.
In the kit, ATM Machine Gate Security System there are two connector used in which one is used as input for a NO Switch on ATM door and other is used for output as a 8mohm speaker .The NO Switch is used to link these two input points It is powered by a compact 9V battery. A connected loop cannot activate IC UM3561 which can generate multi tone siren IC used for toy applications and therefore the speaker does not sound. When the loop is broken, to enable tone generator UM3561.