Hi all
I was just wondering how those doorbells are made, where the button is wireless.
Or a system with say 2-4 buttons wireless?
I can think of all kind of complex solutions, but there must be a simple way - or chipset - for this
wireless doorbell / button
Jan 28, 2015
10 Replies
The receivers are COBs, xmitters are (cough) discreet.
I have a transmitter in front of me and it has at least one chip and what looks like a SAW device. The TX is discrete using one SM transistor.
The chip is a SM HT48RA0-2 8 bit MCU.
formatting link
I'm adapting the doorbell to latch on and off an automatic antenna matching unit in a shed at the bottom of the garden. The unit is powered by solar panel & SLAB arrangement so I don't want it on all the time during the winter.
Charlie.
He who throws dirt loses ground.
What is COB short for? Google find e.g. corn when looking for COB
Chip On Board, the black blob things.
Also, discrete* (@ Bob). Discreet is when they're being very quiet. (See also: 'complimentary' pairs.)
Tim
-- Seven Transistor Labs Electrical Eng>> s>> > Hi all
chip on board , die directly on pcb with a blob of black goo on top
-Lasse
Cheap on board.
;-) ...Jim Thompson
| James E.Thompson | mens |
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I love to cook with wine. Sometimes I even put it in the food.
Cost Of doing Business.
Black goo?
Usually a UV cure epoxy. Something which cures quickly to make produced goods able to be handled not long after application.
yes that is a very technical term for it ...
ofcourse, but unless you are going to make it at home in your kitchen that doesn't really matter
-Lasse
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