HarryA

It is back. On first loading this site I see: members 94524 and 1 reply for this topic. On refreshing see members 94526 and replies 2.

That works . I see the number of members at 94,524 before and after refreshing at the browser.

I noticed that Firefox was caching this site. For example coming here today I see member a count of 94,515. If I force the browster to refresh I get a count of 94,520. I have dorked around with the Firefox browser to find how or where it was caching the site; to no avail. I tried Opera and Edge browsers and got the same results - old data/web site 94,515. It must be cached upon a the server somewhere? I have not noticed this with other web sites but perhaps other web sites are cached but I do not notice.

Conduction loss is larges loss in a MOSFET, it occurs when the MOSFET is in the 'on' state and current flows through its channel. It's calculated using the formula: P = Current^2 × Rds. Also switching losses occur during switch the transistor on and off. Look it this calculator and you will see how large conduction losses are compared to the other losses. https://www.dmcinfo.com/latest-thinking/blog/id/10517/mosfet-power-loss-calculator The LTspice circuit simulator has a large number of MOSFETs listed. If you post what voltages and currents you are interested in I could see what is listed there. It would benefit you to learn to use the simulator for your work.

How do you transfer data from the buffer to a USB interface?

Can you pick a signal off the speakers? Perhaps use a three wire connector-jack that disconnects the speakers when you plug it in. The grounds at the speakers are required by the simulator.

You would need to supply a schematic for anyone to help you. What is "2008"?

I2C is for data transmission not for audio.

One would expect the heads to be parked (off the platters) if not actively in use. If it still works then it must be okay?

see: electrolytic-capacitors-in-electronic-devices

Given two gaps in series both gaps would have to fire simultaneously. Say the narrow gap fired first; where would the electrons come from? What do you mean by not regular needed milliseconds? I built a CDI for a chainsaw. At 1800 rpm it worked fine, at 3600 rpm it would blow the 10 ampere fuse in the 12v to 350v up-converter. I solved the problem by buying a new chainsaw 😉

The TLV9002 output at 25C is 67.8 mv; to get 4v one would need an amplifier gain of 58.99 At 50C the output is 3.27v ; to get 12 volts one would a gain of 3.66 I think a log amplifier would work here. "Log amps are non-linear, analog amplifiers that produce an output that is the logarithm of the input signal or the signal’s envelope. They compress input signals having a large dynamic range into output signals with a fixed amplitude range. This is accomplished by providing high gain for low input signal levels and progressively lower gain for higher level signals" The LTspice simulator has one Analog Devices log amplifier in it. I could try to simulator a circuit using a ramp of 67.8mv to 3.27 As Analog Devices has numerous log amplifier chips and they own the the LTspice simulator it seems odd there would not be more.

Perhaps you will something useful from these two circuits; although somewhat dated. If you are interested I will try to redo the second later.

https://www.alldatasheet.com/view.jsp?Searchword=M88CS8001-S000