The image appears to be that of a ferrite core transformer of the type commonly incorporated in SMPS units --- Such transformers are generally comprised of a primary, an (often tapped) secondary and, occasionally, a feedback/auxiliary winding... Please perform a continuity 'scan' of the leads such that we may be of further assistance.It's from a regular, cheap mobile phone charger. A tiny tranformer, kind of like this one:
http://sc01.alicdn.com/kf/HTB13JztH...transformer-tesla-transformer.jpg_200x200.jpg
I apologize for my over-cursory treatment of the subject in my first post...Thank you for the answer but I don't know how to do that. I'm not even sure I know what it means...
Hi,It's from a regular, cheap mobile phone charger. A tiny tranformer, kind of like this one:
http://sc01.alicdn.com/kf/HTB13JztH...transformer-tesla-transformer.jpg_200x200.jpg
I'm not sure if I undertood you correctly but I'm using only the transformer for stepping up voltage. The higher frequency required for that to work doesn't bother me, I'm trying to use a 555 oscillator with a 9v battery, so changing some specs in the schematic should increase the frequency.Hi,
I dont think you can use that like an ordinary wall wart transformer. That looks like it is from a switching regulated wall wart, which use higher frequency transformers. The only way you could use that is if you knew the specs of that transformer or just needed some light current perhaps.
In any case, you have to use a higher frequency switching signal to power it, not directly from the line. I dont know if you want to do that or not.
Back when they made regular wall warts they would consist of just a 60Hz line transformer and rectifier diodes and a filter cap. These days they make regulated wall warts that use a special switching IC chip that pulses the primary of the transformer and also regulates the output to stay within a certain percentage of the target voltage, such as 5v. These newer kinds have completely different kinds of transformers so they have to be used in a switching circuit.
The 'equidistance' of the tapped winding (i.e. 1,2,3) is curious --- I can but assume such owes to the indicator's precision limitations -- What does the instrument show when the prods are 'shorted' together?That is the result from the "continuity scan", I think that between 6th and 7th lead is the secondary, but I'm not sure about the primary. Any thoughts?
Thanks.
In that case 6,7 is a good choice for the secondary - bear in mind, however, that higher resistance does not necessarily = greater number of turns (though, in this case, I feel same is a safe assumption).I'm not sure if I undertood you correctly but I'm using only the transformer for stepping up voltage.
It reads 0.4 ohms. It isn't the most expensive and high quality multimeter on the market . As for a "half-bridge arrangement" I assume that means using only the first two leads instead of the first and second?The 'equidistance' of the tapped winding (i.e. 1,2,3) is curious --- I can but assume such owes to the indicator's precision limitations -- What does the instrument show when the prods are 'shorted' together?
Please give me a moment that I might compose a diagram
Best regards
HP
Stated plainly it means applying power to the center-tap and alternately switching the 'outer ends' to groundAs for a "half-bridge arrangement" I assume that means using only the first two leads instead of the first and second?
No problem! -- Please let me know should you have further questionsThank you very much for the assistance, plus giving me the tip about the frequency it requires. You helped me a lot!
Okay, sorry to bother you again but just a small final question: wouldn't it be even more efficient if I just connect 5 and 6 together and use 4 through 7 as a single coil for greater inductance?Stated plainly it means applying power to the center-tap and alternately switching the 'outer ends' to ground
Best regards
HP
First off - Please don't assume the phasing is shown correctly! - Such was not determined via resistance testing! --- But to the 'gist' of your question, you could do that (assuming you will be using 1,2,3 as the primary) howbeit it would offer only a modest increase in secondary EMF - whether or not such would be more efficient will depend upon the impedance of the load...wouldn't it be even more efficient if I just connect 5 and 6 together and use 4 through 7 as a single coil for greater inductance?
Thank you very much for your help, you are awesome. Have a great day!First off - Please don't assume the phasing is shown correctly! - Such was not determined via resistance testing! --- But to the 'gist' of your question, you could do that (assuming you will be using 1,2,3 as the primary) howbeit it would offer only a modest increase in secondary EMF - whether or not such would be more efficient will depend upon the impedance of the load...
Please feel free to ask should you have further questions or require clarification
Best regards
HP
Hi,I'm not sure if I undertood you correctly but I'm using only the transformer for stepping up voltage. The higher frequency required for that to work doesn't bother me, I'm trying to use a 555 oscillator with a 9v battery, so changing some specs in the schematic should increase the frequency.
Thank you for your answer.
by Aaron Carman
by Jake Hertz
by Jake Hertz
by Aaron Carman