DC 12V Wired Doorbell Door Bell Chime for Home Office Access Control System

Product Information

You can see a weight or mass near the top of the thin, vertical "reed" which is used to adjust the vibrating frequency (add or subtract mass. The faster you can get the relay to operate (low mass is good), the smaller the transformer can usefully be.

The mass and the screw have differing impacts, so making this thing work "properly" involved adjusting both the mass and the screw to get "perfect" behavior. You need to test with your meter first of all, at the transformer's output, with no wires connected at the output, to ensure that works. Just need to remove the top box over the fridge/freezer to be able to take the lid off the transformer and get my probes in there.It is just a doorbell but it integrates easily with the keyless door entry control panel and works a treat.

There are four cores in the thin wire leading to the front door button: red, yellow, blue and black.Blink is small, battery-powered and truly wire-free, so it’s simple to place and move within any environment. The new, simpler A-G energy rating scale is stricter and designed so that very few products are initially expected to achieve the top “A” rating. Electrical wiring must be in place or installed, often requiring a transformer to ensure the correct voltage is supplied.

When I stripped some insulation from the four cores, two momentarily touched each other and there was a visible spark, so there was power although I can't now reproduce this.

Please note, the installation of this Video Doorbell model is intended to bypass the chime kit, thus disabling the sounds operation. That formed one of the switches and you could also adjust the screw (press harder or less hard on the reed when it wasn't operating) to also adjust the frequency. Cutting and shorting the cable between CHIME and button should not blow the fuse as it is a + and a + switchline, shorting them would just ring the chime.