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Recent content by william2016

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    How to improve the power of Ultrasonic power circuit?

    Re: How to improve the power of Ultrasonic power cicuit ? Thanks for your help. I have put a transducer in parallel connect with the other transducer. And i increased the driver transistors to 8(the original is 4). But the fact is that, there is no improving about the welding power. What...
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    How to improve the power of Ultrasonic power circuit?

    Re: How to improve the power of Ultrasonic power cicuit ? Thanks for your reply. It's really my fault that I have't predict the power down. So can you give me some advices about improving power of every tranducer when multiplle tranducers working togeter. Thanks.
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    How to improve the power of Ultrasonic power circuit?

    How to improve the power of Ultrasonic power cicuit ? Hi,everyone. I have a ultrasonic welding machine (28KHz,800W),mached one tranducer,and it's working well. But now I want more tranducers to match the welding machine. And there is a problem, When the tranducers getting more, the power is...
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    315MHz remote key entry

    Hi,every one: I meet a very interesting thing today. I found the remote key's control distance in the rainy days is far than in the sunny days. I check the battery in the key，the voltage is 3.2V, it is look like good. I don't know why? Who can tell me why? Thanks!
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    [moved] Ultrasonic welding machine

    Thanks for your help. My plan is here.First of all,I will design a circuit with 555 timing chip as a control of welding time, and this is easy for me. Second, I realize the square wave oscillation of piezoelectric ceramic piece best,but how to make a circuit output square wave for 28KHz? That is...
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    [moved] Ultrasonic welding machine

    Thanks for you help. Your explanation is mainly about work principle, please recommend circuit of ultrasonic welding, can you give me some examples.
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    Has anyone tested these 433MHz modules?

    That's right.The length of the antenna module for 433MHz, at about 17cm.
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    [moved] Ultrasonic welding machine

    Re: Ultrasonic welding machine Thanks for you help. I want to use the ultrasonic welding of plastics with piezoelectric ceramic transducer.
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    Has anyone tested these 433MHz modules?

    i suggest you should transmit a preamble about 1ms before send data.and receive module is Super regenerative,may have much noise.
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    [moved] Ultrasonic welding machine

    Hi All who can help me? i want to make a ultrasonic welding machine. and i meet two questions. 1: i haven't any circuit design information about 28KHz. 2: how to design a transducer apply for generater circuit and horn. please help me.
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