Pro Audio Design Forum

The relays are latching type. OK, to be honest, I quickly gave up figuring out this contraption. IIRC the author doesn't go into the "why" but I think it would shed a whole lot of light on his motivation. Could be the author doesn't know the "why", his motivation being to have somebody figure out f...

Relay-Based ON/OFF Flip-Flop Remembers State During Power Failure http://www.electronicdesign.com/analog/relay-based-onoff-flip-flop-remembers-state-during-power-failure https://www.electronicdesign.com/sites/electronicdesign.com/files/IFD2671_Fig1.png https://www.electronicdesign.com/sites/electro...

Thanks for these reviews on ADA4522-2 and OPA2189 for dual DC servo uses. Giving more than datasheets. Good to know about beats from asynchronous clocks, an effect one can hardly guess beforehand. BTW: Which dual servo do you use ? A differentiel Deboo integrator ( that has one cap ) or a more usual...

Thanks for your answers.
I forgot I do have a microchip PIC developement kit Unused for so many years.....
It might very well support what I need for audio projets.

@JR. Wonderful, I am glad to see a DSP with a DAC built in, a perfect solution for this and many more.

EDIT: I spotted dsPIC33F 4 bucks !
Can you recommend a kit with a DSP and DAC, I could play with, plug and play ?

This thread revived an old time where I struggled with LF oscillators for measuring distortion with the double T bridged filter. The best I achieved was nothing to praise, distortion measurements capable of 0.1 %, that was good enough for me. I remember the struggle to achieve an amplitude stable an...

I just discovered the LMP2021. It has very low offset and it is pretty quiet. http://www.ti.com/lit/ds/symlink/lmp2021.pdf Fantastic Vos. Trouble is, for me, I need +15V -15V op amps. I just couldn't get the choppers quiet in my circuit, though they are also working for me. How bad is it ? How to c...

What can be expected with offset compensation with a trimmer ? For instance considering OPA2277: Vos 20µV typ, 65µV max Vos drift 0.15µV / °C Can I expect with proper trimming a final Vos based on drift only. Considering à 10°C to 60°C temperature span, if trimmed at 35°C, this would give about 4µV ...

To minimize loop area this is an interesting way, however there are other objectives. Some components better be on the same side of the PCB for better thermal matching. It is likely there is less temperature gradient for components close on the same side rather than closer but on opposite side. Prac...

opportunity pricing around the internets... This drives me mad. They heavily do it on air flight prices. Years ago I was used to book from an internet travel agency, until I noticed that if I was not bying right away, prices were jacked up, the next times looking for the same flights. Now, I forgot...