Ayne said:Below in the picture is my idea to construct the power supply.
Out Puts
+5V
+9V
+2 to +35V
GND
-5V
-9V
-2 to -35V
Sin Wave Genrator 100Hz TO 1MHz.
The problem is, i don't know that which type of Oscillator i need to use.
Sqr Wave Genrator 100Hz TO 1MHz.
The problem is, i don't know that which type of Oscillator i need to use.
Will LM555 timer will work???
Displaying Unit,
There should be a displaying unit for displaying the frequency of Signal gernators and out put voltage coming from power supply. But i not know how can i show them on 7Segment Display.
Thermal Protection,
There should be a thermal protection circuit, Need Help.
Short circuit Protection,
A short circuit protection circuit, Need Help.
I want to Build, not to buy.
And Plz guide me for more improvement.
Is there need for adding some thing more???
Thanks.
Ayne said:Below in the picture is my idea to construct the power supply.
Out Puts
+5V
+9V
+2 to +35V
GND
-5V
-9V
-2 to -35V
What output impedance? 50ohms is the norm.Sin Wave Genrator 100Hz TO 1MHz.
The problem is, i don't know that which type of Oscillator i need to use.
The TS555 will bo all the way up to 2.7MHzSqr Wave Genrator 100Hz TO 1MHz.
The problem is, i don't know that which type of Oscillator i need to use.
Will LM555 timer will work???
You mean a frequency counter?Displaying Unit,
There should be a displaying unit for displaying the frequency of Signal gernators and out put voltage coming from power supply. But i not know how can i show them on 7Segment Display.
Thermal Protection,
There should be a thermal protection circuit, Need Help.
Short circuit Protection,
A short circuit protection circuit, Need Help.
It's certainly possible, but it will depend on your level of experiance, how many projects have you built before?I want to Build, not to buy.
And Plz guide me for more improvement.
Is there need for adding some thing more???
Thanks.
Hero999 said:What current?
What power?
Is it important to you be able to run all the outputs at their maximum currents simultaniously?
This will require quite a large transformer.
What output impedance? 50ohms is the norm.
Will TL072 Work???I'd go for a wein bridge oscillator, but you'll need to switch the capacitors around and you'll need a fast op-amp.
Can u help me for protecting output from short circuit???The TS555 will bo all the way up to 2.7MHz
What about protecting the output form short circuits?
Do you what to be able to adjust the duty cycle?
Would you even like to be able to adjust the duty and frequency seperately?
If so then a schmitt trigger oscillator and comparator is probably a better option.
Yes a frequency counter and a voltage measurer circuitYou mean a frequency counter?
Wouldn't it be even better if you had the option to isolate it from the sig gen so you can use it seperately?
You can build a frequency counter from discrete logic, programmable loge or even a PIC. The choice is yours.
My transformer is rating is 35-35Volts 2A, I think it will work with no problem.The regulator IC have this built in. However if your transformer and rectifiers can't supply enough current to power all the output simultaniously then you'll a fuse on the DC circuit, it's probably best to use a pollyswitch for this as replacing it everytime you over load it will be a pain. Anyway I'd but a suitable slow blow fuse in series with the live/phase/hot line connected to the transformer's primary just in case.
I already had made power supplies with LM317 and LM7805 seperately.It's certainly possible, but it will depend on your level of experiance, how many projects have you built before?
Ayne said:Yes a frequency counter and a voltage measurer circuit
I think that PIC is a best choice but i am not a good programmer. I only know the MikroBasic and i have made some little programs like LED flashing etc.
Needed help.
Will PIC16F876 will work???
As u r saying use seperately than how is possiable to use same PIC for measuring Voltage and frequency??
You really need a 28V-0-28V transformer, either that you you could try building a 39V pre regulator using a transistor and zenner but this isn't an ideal solution.Ayne said:I need 1A current on both side(+,- V).
currents will be simultaniously...
I have 35-35Volts center tape transformer rated current on it is 2A.
As audioguru says, find a faster op-amp, pay particular attention to the slew rate as well as the unity gain bandwidth.Will TL072 Work???
I need out put impedance 100hm:
Like I said before, the regulator ICs will protect against that, but for extra protection you should add a 2A polyswitch in series with both outputs from the transformer secondary.Can u help me for protecting output from short circuit???
Yes i want to like to adjust the duty and frequency seperately, Guide me more.
Plz help me with tutorials or any web link
That's more than I know but it doesn't sound too difficult.I only know the MikroBasic and i have made some little programs like LED flashing etc.
Hero999 said:Forget about using it upto said fequency and expect the PIC to count it, but there's always the option of adding a divide by 10 counter.
Hero999 said:How does that work?
Just thinking, can't the PIC be used as a low frequency pulse generator and sinewave generator too? If so hwat are the typical frequency limits? Somehow I can't see you been able to generate a 1MHz sinewave with a PIC!
Are there any good waveform generator ICs that are still made?audioguru said:Maxim's MAX038 function generator is also not made anymore.
Ayne said:But i want to made a power supply as above.
The regulators reduce their output current when there is more than 15V across them. Their max heating is only about 20W before they shut down.Ayne said:It mean i need to rewind my transformer to reduce more turns of transformer's winding.
Am i right???
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