eng_shady00
Member level 2
lm358 virtual ground
Hello,
I want to design a simple circuit to generate +4.5 v and -4.5v from a single 9 volt.
I'm designing a small circuit, and instead of building my own power supply i decide to buy a regular 9 volt dc adapter as a power supply.
I want not to use batteries to guarantee a long life power source.
But some ic's i use need split supplies.
Also generating ±6v from 12v adapter will be good.
I'm not sure if dc adapters generate a regulated voltage or not.
If not i think i should use regulators to get a clean voltage. Write?
Finally, The whole circuit is low power and draws low current. But i haven't calculate the current exactly. I'm now using a computer power supply as a test.
Thank u so much.
Hello,
I want to design a simple circuit to generate +4.5 v and -4.5v from a single 9 volt.
I'm designing a small circuit, and instead of building my own power supply i decide to buy a regular 9 volt dc adapter as a power supply.
I want not to use batteries to guarantee a long life power source.
But some ic's i use need split supplies.
Also generating ±6v from 12v adapter will be good.
I'm not sure if dc adapters generate a regulated voltage or not.
If not i think i should use regulators to get a clean voltage. Write?
Finally, The whole circuit is low power and draws low current. But i haven't calculate the current exactly. I'm now using a computer power supply as a test.
Thank u so much.