DIY ultrasonic washing machine

ultrasonic washer A few years ago, advertising information aimed at promoting ultrasonic washing machines could be seen everywhere. And they bought such washing machines much more often. Now the euphoria has passed, and there are fewer and fewer people who want to use an ultrasound assistant. However, craftsmen are still interested in the design of such equipment and want to assemble it, so we have no choice but to offer them all the necessary information in this article.

Why do we need such a washing machine?

Some people will ask: what is an ultrasonic washing machine? We have already answered this question in another publication posted on our website, so we will not return to this question again. But it is worth noting that an ultrasonic washing machine is a fairly simple device that can be easily assembled at home by any craftsman with basic knowledge in the field of electronics.

An ultrasonic washing machine is assembled from improvised materials; often you don’t even need to buy any semiconductor parts, and the circuit is very simple.

ultrasonic washer_2 Many people remember how ineffective such a washing machine is, how much our grandparents spat when they bought this device on the cheap. Why assemble such a washing machine with your own hands, if you can easily buy it at a thrift store for a couple of dollars and then use it as much as you like, as long as your nerves are strong?

Arguing this way, we incorrectly assess the motivation of an experienced DIYer. Very often it is interesting to simply study the principle of operation of the device and then assemble it with your own hands, which then does not matter. Often, after the task has been successfully completed, the DIYer throws the assembled device away, without even thinking about using it. We also assembled a homemade ultrasonic washing machine for the sake of principle, and not because each of us dreams of washing with it. So we will be happy to share our experience with you, no matter what goals you pursue when assembling this device.

What will you need?

An ultrasonic washing machine is a simple electronic device, but to assemble it you will need some simple equipment: a multimeter, a soldering iron, a microdrill for drilling holes for semiconductor elements, a screwdriver, an awl, a household hair dryer. You will also need materials that may require you to rummage through your shed, storage room, or garage to find them. We will need:

piezoceramic element or simply piezoelectric element;
power supply without transformer;
module generating pulses;
small plastic box approximately 4x4 cm;
glue "Moment";
tube of silicone sealant;
solder;
phone charging;
board from an electronic alarm clock, telephone or Chinese radio.

In our case, we will take an old phone charger Siemens and a board from a Chinese electronic alarm clock, as well as a plastic case from a burnt doorbell. The rest of the details are on the list.

We took the board from an electronic alarm clock because it can be turned into an ultrasonic washing machine with minimal modifications with your own hands. The circuit of an ultrasonic washing machine and the circuit of a Chinese electronic alarm clock are very close.

We make the device

Before you start assembling the ultrasonic washing machine with your own hands, let’s get acquainted with its diagram.As we have already noted, there is nothing complicated; in fact, you need to put together the charging parts from the phone and the electronic alarm clock.

ultrasonic washing machine diagram As you may have guessed from the electronic alarm clock board, we will only unsolder the piezoelectric element. Let's do the following manipulations with it:

we open the body of the burnt doorbell and throw out all the guts;
securely glue the piezoelectric element to the inside of the case;
we solder the wires to this element with our own hands as shown in the figure below; in this case it is not necessary to observe the polarity;
we take the wire outside the housing and fix it at the base of this housing;
fill the insides of the box together with the glued piezoelectric element with sealant, there is no need to spare the sealant, since it is necessary to ensure reliable waterproofing, since the box will need to be lowered into water;
dry the sealant with a hairdryer, and then screw the box.

Next, we will rework the power supply, as indicated in the diagram. We take out its board, find rectifier diodes and a four-hundred-volt capacitor. We get rid of the capacitor. We solder 3 IN4007 diodes into the board. We solder the wires coming from the box with the piezoelectric element to the secondary winding of the transformer. The wiring must be well insulated. Assembling the charger housing.

Well, the homemade ultrasonic washer is ready. The advantage of the design is that it works without interruption in conditions of high humidity. We will not discuss the effectiveness of the device, but we can speak with complete confidence about its performance. Good luck!