Loftech TS-1 Schematics

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mediatechnology
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Re: Loftech TS-1 Schematics

Post by mediatechnology » Fri Nov 24, 2017 2:59 pm

JR. wrote:
Fri Nov 24, 2017 1:08 pm
I am not enthusiastic about trying to merchandise this, but tempted to make one, because I can... 8-)

JR
And you should.
"There does seem to be a pattern where, the more difficult a truth is to stomach, the higher the hysteria levels go internally at Google."
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JR.
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Re: Loftech TS-1 Schematics

Post by JR. » Sun Nov 26, 2017 11:50 am

I found a nice back lit LCD display with 16, 1/2" high characters... not cheap (>$20) but with 16 characters I can display decibel level and frequency at same time.
Image

There are cheaper displays but with much smaller characters. The only cheap/large character LCD was 4 digit clock display....

JR

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JR.
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Re: Loftech TS-1 Schematics

Post by JR. » Sun Nov 26, 2017 2:52 pm

This is fun thinking about this....

I could use a 16B DSPic that has 2x16b DAC built in, but only 12 bit A/D built in... Or in the $3-$4 range I can get a 24b stereo in/stereo out codec... that I can hang on a cheaper micro...

Probably use a DPOT to pad scale the input range down to the 3V codec.

Now that is probably more bits and I/O than I need, but why scrimp?

I need to soak this in beer tonight. 8-)

JR

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mediatechnology
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Re: Loftech TS-1 Schematics

Post by mediatechnology » Sun Nov 26, 2017 5:06 pm

After soaking it in beer you might want to start a thread in the Design area of the forum. I'm liking this.

Other than the analog front end for the measurement A/D and the balanced output there doesn't seem like much additional outboard circuitry would be required.

Rather than a DPOT you might consider a resistive pad since the DPOTs THD would limit you if you ever wanted to use the same engine to perform THD measurement. You would want a low distortion coarse output pad too wouldn't you?
"There does seem to be a pattern where, the more difficult a truth is to stomach, the higher the hysteria levels go internally at Google."
Visit RockmoreLabs on Etsy https://www.etsy.com/shop/RockmoreLabs
http://www.ka-electronics.com

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JR.
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Re: Loftech TS-1 Schematics

Post by JR. » Mon Nov 27, 2017 11:27 am

Wayne can you split this topic and move this veer to another forum?

Moderators should have that capability.

If not I will start another.

JR

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mediatechnology
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Re: Loftech TS-1 Schematics

Post by mediatechnology » Mon Nov 27, 2017 12:00 pm

I will move that. Not something I do often so I have to remember.

What shall we call it?
"There does seem to be a pattern where, the more difficult a truth is to stomach, the higher the hysteria levels go internally at Google."
Visit RockmoreLabs on Etsy https://www.etsy.com/shop/RockmoreLabs
http://www.ka-electronics.com

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JR.
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Re: Loftech TS-1 Schematics

Post by JR. » Mon Nov 27, 2017 12:09 pm

TS-too.... TS-1 revisit

JR

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mediatechnology
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Re: Loftech TS-1 Schematics

Post by mediatechnology » Mon Nov 27, 2017 12:13 pm

"There does seem to be a pattern where, the more difficult a truth is to stomach, the higher the hysteria levels go internally at Google."
Visit RockmoreLabs on Etsy https://www.etsy.com/shop/RockmoreLabs
http://www.ka-electronics.com

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