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Good catch. Sorry about that. The schematic in my design notebook shows a value of 510 ohms for R4, but I can envision that value being dependent on the SSR that is being used.

I want to say that someone had measured the doorbell "on" time and it was about 150mSec, but I don't have a reference source for that. It's certainly a short period of time, and is the reason for the "pulse stretcher" circuit in my wiring writeup. One thought is having a 24V relay driven by...

There's also no guarantee that the doorbell would ever make it to the general access store. For example, a lot of us bought POE switches from Early Access 1 to 2 years ago that never made it.

After reading the thread to better understand the experiences people have had with electronic chimes, I now believe you pretty much HAVE to use the power kit with both a mechanical or electronic/digital chime. I'm tweaking my earlier theory about the chime kit. I now agree with @TechBill that...

Replying to an old post... I'm slowly working through the entire thread and this question didn't appear to get answered. The blue component is an electrolytic capacitor - likely in the power circuit that converts the AC input from the transformer to DC for the video doorbell to function...

I'm not sure I have an answer. I don't have one of these video doorbells, so any suggestion from me would be of questionable value. I would think, however, that only trial and error would determine a) how well the transformer and doorbell can drive two chimes in parallel, or b) whether the...

There might be some electronic chimes that use the doorbell button in a dry contact way, but that's not my understanding of how most work. With electronic chimes, the chime needs to be receiving power even when the doorbell button isn't pressed. Why? Because the chime may be playing some...

I've made a pass at searching through the thread for the history with electronic chimes. Can you answer a question? Is there any kind of setting on the video doorbell where you choose the type of chime that you have? Mabye a selection between none/mechanical/electronic? I've seen posts mention...

I actually had another paragraph in my post that I removed in a meager attempt to reduce the long post length. An advantage of shunting across the mechanical chime during the inactive state is that yes, the video doorbell will then be receiving pretty much the full AC voltage of the power...

David L - Thanks for the images of the power kit and the link back to the oscilloscope measurements. OK, so the power kit has some electronics to it. It's not just a simple resistor as I had suspected. The board images aren't high enough resolution to zoom in and read part numbers, but I can...

Has anyone ever characterized what the "Power Kit" is? It is wired in parallel with the the mechanical chime. Its going to be limited on what it can do to "regulate" the power going to the chime. My guess is it is nothing but a power resistor inside a fancy package. Not really sure what else...

It would be more complicated than that since the typical doorbell wiring is low voltage AC, not DC. One option that comes to mind is to add a resistor across the chime terminals - that is prescribed as a means to reduce the idle state "chatter" at the chime solenoids. The reason for that would...

The problem is that the chime and DB1 are powered in series. When power is reapplied, current rushes through the chime to the DB1 as part of powering it up, and that can be enough current to cause the chime to strike. Likewise, if you watch the chime throughout the startup, you may even see...

WilRC - A lot of information on this HikVision video doorbell is in the thread Sweet! LTS is releasing an ONVIF compatible doorbell with SD card slot and 940nm IR. One post talking about how to clean the inside of the lens to reduce glare issues is at Sweet! LTS is releasing an ONVIF compatible...

The "most complete" listing of firmware options I'm aware of is at Nelly's Security. On their firmware downloads page, select Camera type, brand NSC, and model NSC-DB1 to get the firmware options. Unfortunately, there are no release notes, the version number doesn't appear to ever change, and...

Fundamentally, I think you have to compare the DB1 against whatever alternative you might have. I'm not aware of a perfect solution - especially one that doesn't involve an ongoing fee to use. From that perspective, all things considered, I'm "OK" with our DB1. Is it a robust product? No...

Yeah, that 4-note or 8-note chime likely won't work. You need to find a more basic two-note chime where you get one note when you press the doorbell button, and another note when you release it (assuming the button is wired to the front door terminal on the chime). Basically, look for the...

No, that's just the mechanical chime part. The two rods with springs around them are solenoids that are "pulled" into the block when the doorbell button is pressed. Have someone press the button for you so can see this. The transformer would be located somewhere else - here they are...

For your reference, there's another thread on ipcamtalk with lots of info on the DB1, assuming you can bear with reading all 49 pages of it. You can find the thread at Sweet! LTS is releasing an ONVIF compatible doorbell with SD card slot and 940nm IR Receiving notifications while away from...

I'm not familiar with changing any settings from a NVR, so I'll say the web interface for the doorbell itself.

@Ip2b - Can you clarify how you see/notice the time discrepancy? Are you seeing it in the NVR data, or from liveview in the app, motion detection notifications, or the web portal, or...? Sounds like you've been trying Manual Time Sync. Via the web portal, have you tried the option to sync to...

@alarmpro - Pressing the side button for the 30 seconds or so until the doorbell says "rebooting" is actually a restore to factory defaults, not just a reset. Yes, that sets the password for the doorbell back to the factory default. From info earlier in the thread, the default password is...

@ChasCam580 - your doorbell has likely went "offline" as far as Hik-Vision is concerned. You can verify this by logging into the url at hik-connect.com using the email address you used to create your app log-in with your app password. If it shows offline, one way to recover is to reboot the...

Have you tried a new SD card?

@Getzy24 - Maybe two cameras leads to too much data for your WiFi?

FWIW, I had some extra time today and threw together the attachment. It tries to address some of the technical aspects behind wiring up doorbells in general, some specifics in wiring the DB1, and culminates in describing an electronic circuit that can be used to extend the minimal delay between...

Bah. Well, I went 15 days anyway. HikVision reported our DB1 as offline today, for no known reason. Even with no streaming to the DVR and only one phone with RCA Security logged into it. Reboot through the web gui brought it back online.

Understood. I think the main concern I had was not knowing when we could be "trusting" the doorbell. For a while, I actually kept logging into the hikvision user authentication site a couple of times a day to check the online/offline status as an indicator. Then, whenever the wife took our...

Well, but you've been having the offline issue and had to reset the doorbell, right? Those are exactly the problems I'm saying I avoid by not streaming. EDIT: That wasn't a very clear response. I really have OTHER issues, but I think they all relate to the DB1 being declared offline or at...

I got mine from Nelly's Security - their part number for it is NSC-DB1. There's a thread on it in the Nelly's Security category in the vendor area here. If nothing else, their "quick start" guide for it is more detailed than I've seen anywhere else, and they have a downloads page where you can...