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Voltage in noise part
Posted: May 16th, '14, 09:24
by juicyboy
When I measure voltage from power supply I get +15.05V, -16.30V and +5.04V and with 2,7k resistor i get -15.04 from the negative side.
Question is that is it ok that when I measure voltage from NOISE negative pin, I get the same -16.30V? Is the situation same that the regulator does not have enough load to start regulating?
Re: Voltage in noise part
Posted: May 16th, '14, 17:13
by e-licktronic
Dear Juicyboy,
Is it the first instrument you built ?
Could you adjust TM4 to get the 130mV ?
If your negative regulator 7915 is working with loading resistor you can continue building the other instrument
Best regards,
e-licktornic
Re: Voltage in noise part
Posted: May 19th, '14, 20:16
by juicyboy
e-licktronic wrote:Dear Juicyboy,
Is it the first instrument you built ?
Could you adjust TM4 to get the 130mV ?
If your negative regulator 7915 is working with loading resistor you can continue building the other instrument
Best regards,
e-licktornic
Yes, It was my first instrument. I got 130mV right away with little adjusting of TM4. I don't understand why people need to change their resistor values? Is it that they use cheap AC/AC power supplies or what?