DAVE@ORION.BITNET (09/12/90)
Our elevators on campus are always quite busy, and we are looking to modify them with a 'remote control' to allow authorized personnel immediate access to a car when nessecary. We hope to do this by placing radio-controlled switches in parallel with the inspection key switches, and certain floor buttons. Can someone please give us some advice and schematics for INEXPENSIVE circuits that can control at least 5 switches independantly. I would like one or two of them to be 'permanent toggle' controlled, ie: a button is pressed on the transmitter, causing the switch to be closed, untill the button is pressed again, upon which point the switch will be opened. I need other switches to be momentary, closing the circuit only while the transmiting button is pressed. My knowlege of electronics is not great (obviously) and I would like the RC circuit to finally control a relay - which I can connect across the switch terminals. If my objectives are not clear, please email me and I can explain them further. If NOTHING ELSE, I would like the schematic for a single xmitter/reciever to control ONE relay - momentary contact. thanx, dave michaels dave@mercury.njit.edu
henry@zoo.toronto.edu (Henry Spencer) (09/13/90)
In article <154DAVE@ORION> DAVE@ORION.BITNET writes: >Our elevators on campus are always quite busy, and we are looking to modify >them with a 'remote control' to allow authorized personnel immediate access >to a car when nessecary. We hope to do this by placing radio-controlled >switches in parallel... Is there a reason why you absolutely must have *radio* control? Given that one seldom summons an elevator without being physically at one of the doors, a keyswitch system would be an order of magnitude simpler, and would avoid concerns about noise pickup etc (a significant worry for simple radio systems). -- TCP/IP: handling tomorrow's loads today| Henry Spencer at U of Toronto Zoology OSI: handling yesterday's loads someday| henry@zoo.toronto.edu utzoo!henry