This project is a major upgrade of the idea to clean/wash clothes and other small, water resistant items.This divice does not require impulse transformer and is not critical to the type and number of piezo activators. A new way to sweep the frequency is used, in order to improve the efficiency of the cleaning.Driving a piezo buzzer at a high frequency is not an easy task, especially when it is out of resonance. A special curcuit for insuring a dead time in the switching the output transistors was emplemented. This way, a great improvement in the power efficiency was achieved.As with the first device, this can be powered both from a 12V car battery and a 220/110V to 12V adapter, so it can be used in- and outdoors. Here you can learn more about ultrasonic washing/cleaning and here are instructions for operation of the device. In short, with this device you get:- You can wash delicate tissues as silk, nylon, underwear, man ties and so on.
- Colors of the clothes will be more radiant than ever.- The clothes will have a soft, feather like touch.- Ultrasonic washing effectively kills most of the bacteria on the clothes.- Energy saving - the device consumes appr. 4W.
- Simple design with low cost elements. - Enhanced Frequency Sweep. - Power Supply +12V 0.35A - Time to build: Appr. 3 hours. - Cost of elements: Appr. USD 3.
- two CMOS 4001 chips. - 4 transistors 1,5A - 2 general purpose transistors. - 12 resistors and 12 capacitors. - 4 piezoceramic buzzers. - 1 schottky diode.
In the zip file (..MB) you will find:
- Circuit diagram with EAGLE PCB design. - LTspice simulation of the circuit. - Read me.pdf file with explanations and practical tips. - Pictures of the the device.
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