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Registered Member #1430
Joined: Sun Apr 06 2008, 11:12AM
Location: Ã…rhus, Denmark
Posts: 102
hey all. i was wondering if you could help me figure out a way to easily turn DC into AC and how to make a DC pulser. they both need to be able to run off 1,5VDC and up if possible the frequecy should be variable
Registered Member #1408
Joined: Fri Mar 21 2008, 03:49PM
Location: Oracle, AZ
Posts: 679
The Rules of the Forum dictate that there should be very limited posting of schematics & none -as a direct response; thus I'll make an attempt at this with generalities as the question was something I wondered about a few times also.
The output of a non-rectified transformer is AC. Therefore you have a starting point. As for DC pulsing is concerned there is a common little device often used in commercial "shockers" called a pulse transformer (see mouser.com, etc, etc). So with two common components you have alteration of energy. You could go further depending upon output voltage & frequency requirements but you must bear in mind what you are attempting prior to contextual design.
I was given some VERY good advice by a member here once. He said he learned by himself with VERY limited direct textual study (he didn't like to live in books, etc - - while I, myself, am a "reader").....He would find various components and briefly study WHAT they do within a given circuit. .......(Example) A variable rectifier & it's relationship to a given resistance, etc - you get the idea). ....Well, it's a great way to design your own stuff and learn.
Take the individual components and REALLY learn what they do. There is more than may meet the eye. By broadening your understanding of existing components you will have a starting point with your design. THEN you can contact someone with experience and he might help you iron out the little kinks. My point here is that I don't want someone to do my hobby FOR ME: I want to learn, so I just need a starting point, so his advice was worth gold!
Frankly I ask by personal message a question that I have exhausted all my resources finding even a starting point, instead of starting an entire thread because the concept may be elementary or of marginal application to the majority of members and have only been told to bugger-off by one "gentleman".
Registered Member #1370
Joined: Mon Mar 03 2008, 09:01AM
Location: Finland
Posts: 56
DC to AC-conversion isn't very complicated. You need only square-wave oscillator that drives power transistor and transformer. You get adjustable frequency, voltage and power (PWM). See
Registered Member #1430
Joined: Sun Apr 06 2008, 11:12AM
Location: Ã…rhus, Denmark
Posts: 102
thanks for the feedback. it sounds like a 555 driver is the way to go. making the 555 driver is simple but is there any way i can make a 555 driver drive a transistor or something to act as a switch? like a switch that starts and stops conducting controlled by the pulser. would a transistor work for that?
would something like this: work? as the 555 pulses the "random device turns on and off
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DC to AC/pulsed DC?
