Recent content by 89c52

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...

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...

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...

thanks a lot all of you, i am trying to learn the theory first ... so if any one gets any type of info on this intercom system please share your suggestions, iam also putting up another question related to intercom so kindly suggest some solution there also.

sir iam really greatful to you mr. daron for provding me such information... the main point is that i want to design the system my self a small PABX for 2 truncks and 8 extensions. Now can you please guide me how should i make the software for this using assmebly or any recommended language...

thankyou all of you for helping me so much. but i think i never mADe my queStion cleaR.. i want to design a simple PABX in which there are 2 trunck lines facility and 8 extensions means a 2+8 PABX and i want to design its SLIC by my self... so i thought the first step is to make a 8 lines...

thankyou both of you for giving my question so much time but i don't understand what is 1A2... can any one please explain

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...