Alarm these days is often a necessity. Unfortunately, most products of this category sold in stores are not affordable for everyone. It would seem that it was worth simply abandoning the idea of acquiring a security system or an alarm system. However, why deny yourself that you can make it yourself?
The manufacture of a homemade push alarm from a syringe is dedicated to the video review, which you can see below
So, what do we need to make an alarm:
- a syringe;
- crown;
- three wiring;
- scissors;
- stationery buttons;
- Light-emitting diode;
- glue gun;
- soldering iron.
Let's start with the syringe to be taken apart. Next, we take a piece of metal wire, heat it and make a hole on the top of the piston. Note that according to the author, almost any syringe is suitable, regardless of size.
Next, take a piece of wiring and thread it through the hole made on the piston.
We wind the tip of the wiring onto the pushpin of the needle.
Push the pushpin in the middle of the upper part of the piston of the syringe, next to the hole made for wiring.
Next, we fix the wire on the piston with a glue gun.
Next, take the scissors and cut one rib on the piston. If you wish, you can do this with a stationery knife.
Again, heat the wire and make a hole near the nozzle of the syringe.
We insert another clerical button through this hole so that the needle remains outside.
We take one more posting and wrap it on the pushpin. Solder the wire to the clerical needle with a soldering iron.
We collect the syringe, pushing inward a little wire, which is fixed on the piston.
Glue the wire on one of the ears. Leave so much wire in the syringe itself so that the piston can move freely.
We take the crown and fix it on the syringe. The alarm is almost ready. It remains to bring it into action.
To do this, take one wire coming from the crown and connect it to one wire coming from the syringe.
Next, we take the LED, which we will use as an example, as well as testing the alarm. Later, after a successful test, the LED can be replaced with any other electrical device, such as a siren. We connect one contact of the LED to the battery, and the second to the second wiring coming from the syringe.
We take the electrical tape, which is needed to isolate all the bare wires.
After such simple actions, our alarm system is ready for use. It works according to the following principle. It is worth pushing the piston so that two push pins close the contact and the alarm goes off. In our case, it will be a light bulb LED.
