Combine 3 circuits--To Many Power Supplies, Help

[amdx]

I have three circuits I'm putting in one box.
I have one +15v circuit, one plus and minus 9v circuit, and one plus 9v
circuit.
The Plus and Minus 9v is an opamp circuit, I'd like to make that
single ended if possible.
How do I rearrange the circuit for single ended supply and still have
a DC output to drive the meter?

btw, this will be battery operated, so I want to come up with a
combination of rechargeable batteries to run it.

The circuit setup is here.

> http://s395.photobucket.com/user/Qmavam/media/Power%20Supply%20problem_zpsqk12scc9.jpg.html

More info,
The +15V unit has a 12V regulator in it. I could run a 12V line to the
LM386 and If, the Opamp was single ended, to that also.

Thanks, Mikek

 

[Jasen Betts]

On 2016-02-04, amdx <nojunk@knology.net> wrote:

I have three circuits I'm putting in one box.
I have one +15v circuit, one plus and minus 9v circuit, and one plus 9v
circuit.
The Plus and Minus 9v is an opamp circuit, I'd like to make that
single ended if possible.
How do I rearrange the circuit for single ended supply and still have
a DC output to drive the meter?

btw, this will be battery operated, so I want to come up with a
combination of rechargeable batteries to run it.

The circuit setup is here.

http://s395.photobucket.com/user/Qmavam/media/Power%20Supply%20problem_zpsqk12scc9.jpg.html

More info,
The +15V unit has a 12V regulator in it. I could run a 12V line to the
LM386 and If, the Opamp was single ended, to that also.

Thanks, Mikek

Put DC blocking capacitors between the RF amp and the op-amps and
between the op-amp and the LM386

run the rf-amp off +9, -9 that's 18V and withing allowable range
run the op amp of +/- 9V as shown in your drawing
run the LM386 of +9, 0V as shown.

--
\_(ツ)_

 

[amdx]

On 2/4/2016 10:30 PM, Jasen Betts wrote:

On 2016-02-04, amdx <nojunk@knology.net> wrote:
I have three circuits I'm putting in one box.
I have one +15v circuit, one plus and minus 9v circuit, and one plus 9v
circuit.
The Plus and Minus 9v is an opamp circuit, I'd like to make that
single ended if possible.
How do I rearrange the circuit for single ended supply and still have
a DC output to drive the meter?

btw, this will be battery operated, so I want to come up with a
combination of rechargeable batteries to run it.

The circuit setup is here.

http://s395.photobucket.com/user/Qmavam/media/Power%20Supply%20problem_zpsqk12scc9.jpg.html

More info,
The +15V unit has a 12V regulator in it. I could run a 12V line to the
LM386 and If, the Opamp was single ended, to that also.

Thanks, Mikek

Put DC blocking capacitors between the RF amp and the op-amps and
between the op-amp and the LM386

run the rf-amp off +9, -9 that's 18V and withing allowable range
run the op amp of +/- 9V as shown in your drawing
run the LM386 of +9, 0V as shown.

Thanks, here is a slightly more detailed drawing showing where I think
I have a reference problem.


http://s395.photobucket.com/user/Qmavam/media/Power%20power%20meter%20PS%20Check_zpsjulpz5ui.jpg.html

Mikek

 

[Jasen Betts]

On 2016-02-07, amdx <nojunk@knology.net> wrote:

On 2/4/2016 10:30 PM, Jasen Betts wrote:

On 2016-02-04, amdx <nojunk@knology.net> wrote:
I have three circuits I'm putting in one box.
I have one +15v circuit, one plus and minus 9v circuit, and one plus 9v
circuit.
The Plus and Minus 9v is an opamp circuit, I'd like to make that
single ended if possible.
How do I rearrange the circuit for single ended supply and still have
a DC output to drive the meter?

btw, this will be battery operated, so I want to come up with a
combination of rechargeable batteries to run it.

The circuit setup is here.

http://s395.photobucket.com/user/Qmavam/media/Power%20Supply%20problem_zpsqk12scc9.jpg.html

More info,
The +15V unit has a 12V regulator in it. I could run a 12V line to the
LM386 and If, the Opamp was single ended, to that also.

Thanks, Mikek

Put DC blocking capacitors between the RF amp and the op-amps and
between the op-amp and the LM386

run the rf-amp off +9, -9 that's 18V and withing allowable range
run the op amp of +/- 9V as shown in your drawing
run the LM386 of +9, 0V as shown.

Thanks, here is a slightly more detailed drawing showing where I think
I have a reference problem.

http://s395.photobucket.com/user/Qmavam/media/Power%20power%20meter%20PS%20Check_zpsjulpz5ui.jpg.html

put a large-ish ceramic capacitor between the -9v RF ground and the 0V
op-amp ground, right where that arrow points. say 10uF or so. (chosen
to be 100 times greater than the 0.1uF)

the capacitor will effectively be parallel with the "-9V" battery, But
locate it where that line points to reduce loop dimensions.

--
\_(ツ)_