Spam comments.

I have always believed in free anonymous exchange of information, thoughts, ideas and comments.

I have always kept the comments on my blogs free from needing to sign up, or jump through any hoops in order for you to come here and post a comment, and have never deleted comments unless they were blatant spam and totally unrelated to the content of the blog.

However, as of lately many of the comments that I have been getting are spam related. Some obvious, others not so much (nonsense comments that make little sense, but still provide the spammers with back links)

I will be deleting all comments that I believe to be spam. This in no way is intended to restrict anyone's free and anonymous exchange of their thoughts or comments, and I will be removing ONLY comments that are spam. So feel free to continue to comment anonymously however you feel, even if you feel the need to hurl insults, as the only thing that will be removed from the comments from here forward will be spam related comments.

More doorphones + loudringer

Seems that lately I have been doing nothing but installing doorphones for customers. I had a huge inventory of doorphones and relays that I depleted within just the last week alone. 

Two SPA112 devices.
One is for 2 separate door phones
One is for 2 analog lines added to the door phone ring group.
One RC2A - only one of the doors that got a doorphone installed has a doorlatch,
the other door is always open during business hours and did not require a relay. 

Since the analog stations were placed within the warehouse so that workers
would be made aware when someone was ringing the door phone
a loud ringer had to be added above those phones so that people could hear
from anywhere in the warehouse that someone was at the door.
The customer picked these up on their own, and I am extremely impressed
with this model. All that is required is a connection to the phone line
it is powered by the ringing voltage of the phone line it is connected to. 

More doorphones and keypads installed

Front door and inside front door get their own relay,
Share a single phone line, and activate simultaneously
Upstairs office has its own relay and own phone line,
and acts independently.

Upstairs office has a doorphone (relay in above image)
and a keypad to activate the door latch. 

Buzzing a mantrap with a single user input

I have been installing many new VoIP systems and door releases in the diamond district lately. Just about every single office within the diamond district has a mantrap at the entrance. Basically a mantrap is a set of two doors. When one door is open the second door can not be open.

Configuring multiple relays like this are not limited to mantrap applications. If both doors are permitted to be opened at the same time the magnets can be removed from the configuration, and the wire going to the magnet can go directly to the door latch. Other possibilities would be for an electronic gate, or garage door that would automatically close - timings would need to be adjusted to allow sufficient time between cycles, and should be wired into a laser to ensure that the door does not close on anything that might not clear the gate/door. 

The image shows configuration with a doorphone, but this could easily be modifiable for any relay application, such as keychain FOBs.