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Yes i try to help where i can, as over the years others have helped me, thats right 0 volts neutral connection, and posative volts in, but its AC and either way round is ok, but if the line in is marked as neutral and live in, then observe the input status. And the trasformer bracket, and the chassis case is grounded with a bolt washer and nut connected to the wire ground link from the supply input. Good luck with the project, i will keep an eye out for updates. Dave.
Yes i try to help where i can, as over the years others have helped me, thats right 0 volts neutral connection, and posative volts in, but its AC and either way round is ok, but if the line in is marked as neutral and live in, then observe the input status. And the trasformer bracket, and the chassis case is grounded with a bolt washer and nut connected to the wire ground link from the supply input. Good luck with the project, i will keep an eye out for updates. Dave.
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Whats EEE, i dont know that. Expert no not me, keen hobbyist best sums it up, i have long term illness to contend with, but stil enjoy electronics on a hobby level, when my health allows me. My forum activaty is part of it all, and lets me have some electronic contacts even when not well enough to build any circuits, anyway good luck with it all. Dave.
Whats EEE, i dont know that. Expert no not me, keen hobbyist best sums it up, i have long term illness to contend with, but stil enjoy electronics on a hobby level, when my health allows me. My forum activaty is part of it all, and lets me have some electronic contacts even when not well enough to build any circuits, anyway good luck with it all. Dave.
"chassis case is grounded with a bolt washer and nut connected to the wire ground link from the supply input." I will have to use the earth wire for this grounding?
EEE means Electrical and Electronic Engineering. Sorry to hear that. You will get better
you can take your hobby to the next lvl.
EEE means Electrical and Electronic Engineering. Sorry to hear that. You will get better
you can take your hobby to the next lvl.this circuit can be designed in 3 stages..
firstly,the ac voltage from the mains supply must be reduced to 24 V ac voltage by using a transformer
next is converting the 24v ac to unregulated dc by using a bridge rectifier...
then the obtained voltage must be smoothened by connecting a capacitor in parallel
next it is reguleted by using a simple zener diode or by some regulator ics...
the resulting will be a regulated dc supply...
firstly,the ac voltage from the mains supply must be reduced to 24 V ac voltage by using a transformer
next is converting the 24v ac to unregulated dc by using a bridge rectifier...
then the obtained voltage must be smoothened by connecting a capacitor in parallel
next it is reguleted by using a simple zener diode or by some regulator ics...
the resulting will be a regulated dc supply...
transformer with 24v is not enough,coz there will be some voltage drops in the circuit...
its better to use 25 or 26 v
its better to use 25 or 26 v
op-amps cannot be used...coz they also require dc power supply( +Vcc and -Vcc)to operate...if u want to increase the current drawn from the transformer,u hav to buy the transformer with high KVA (kilo-volt ampere) rating...
how can u provide power supply to an op-amp?...transformer of 50 VA cannot provide your required current of 2A becoz its not ideal...u still have to increase..
opamp also requires a negative power supply...if u can provide +24 volts..u must also provide -24....and moreover how can u use your input to the opamp as its power supply...i think its not possible...the above calculation which u made is just theoritical...most of the transformers we use are practical...so eventhough the specified VA rating is 50...it may just provide some voltage around 30 or 40...
surely...it will work...even i made it...
+/-24V seems a little high for post op-amps. +/-18 is a more common maximum.
When you rectify AC you create a DC rail that can be as high as the peak voltage of the transformer. This is 1.4 times the RMS value. It also means that the current available is roughly limited to 0.71 of the nominal transformer rating. (1/1.414 = 0.707).
In practice it may not be so simple, but you get the idea.
When you rectify AC you create a DC rail that can be as high as the peak voltage of the transformer. This is 1.4 times the RMS value. It also means that the current available is roughly limited to 0.71 of the nominal transformer rating. (1/1.414 = 0.707).
In practice it may not be so simple, but you get the idea.
yeah steve....but i think we get the average value((1/pi)Vmax) and not the peak value when ac is converted to dc...
capacitor does not increase the voltage...its just used to reduce the ripples in ac voltage...(smooothening the waveform)
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