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  1. 89c52

    Analog Hotel Communication intercom

    Firstly any one knows any discussion forum for electronics and particularly on intercom manufacturing etc... Secondly, Iam trying to make such an intercom system for Hotel room communication for lets say 8 rooms which has following facilities:- 1} there will be a Main Reception Pannel board...
  2. 89c52

    making cordless door intercom

    Hi iam really interested in making a door intercom full deplux which works without cable. i have developed a door intercom using 4 inch speaker at main gate with LM386 on the door side and KA2410 on the hand set side. This intercom works on 4 wires , and uses 18 volts. Now how i can make it...
  3. 89c52

    controlling cross talk in a 50 lines digital slic based intercom

    Now here is a issue that is really confusing me these days. I have got a simple 50 lines pulse dailing intercom system. For this system 8816 and microcontroller 89c52 is used. I have practically done its cabling using the common wire thing but there is lot of cross talk coming in this system...
  4. 89c52

    Designing a Simple Tone or pulse based Intercom system

    hello all, this is my first time on this forum so if i make any mistake in asking the question let me know. Iam willing to design a simple 8 lines intercom system, no trunck or co. line involved, its a simple intercom system with which normal tone or pulse dailing telephone sets can be...

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