Wow! I thought this might be a bit interesting at first glance, but after watching I have a few ideas for projects I want to build. These different circuit blocks are interesting little beginner's tools on their own. Thanks for a save-the-reference level upload. -Jake
Hey Rodger, after looking at this in a little more detail, I have one question. 15:01 On IC5 pin 3 (TL082), why is this node connected to the 10k trim pot (R17) of the adjustable high voltage circuit block below? Is the 5V6 zener (D11) just acting as a reference for the high voltage circuit or is there something more to this? If I build the current limiting circuit independently, should there be a 10K resistor in parallel with the zener to ground or just omit the resistor entirely? I'm pretty sure it's needed to act as a voltage divider with the 10K resistor of R9, but I'm not 100%. Also I guess a 5V6 zener (D11)/voltage reference would be needed for the trim pot to build the adjustable high voltage circuit by itself. Thanks in advance for any advice ;) -Jake
D11 creates a 5.6V reference voltage for the upper tab of the pot so that with the middle tab you get a variable voltage between 0 and 5.6V which then goes the inverting input of the OpAmp as a "set voltage" If you build the current limiting circuit alone you don´t need an extra 10k resistor in parallel to the zener-diode. That´s the purpose of the zener-diode: to make the voltage across it relatively independent of the load in parallel to it (here: no load or 10k load). And yes: to build the high voltage circuit alone you need the part with the zener-diode (or another stable 5...6V reference voltage from somewhere else in your circuit)
@@KainkaLabs I meant in used condition. I know that ELV don't sell it anymore 🙂 But I successfully recreated the device and it works 👍🏻 Now I'm going for the Klirrfaktor Messgerät. Too bad that you don't make more of this videos.
Yes. I noticed that only after publishing and couldn´t change it any more. I wil try to insert a hint that no easter eggs are hidden in the last 5 minutes :-)
Welcome back Roger, happy 2019!
Thank you for sharing Rodger! NICE to see you back. Joel
Wow! I thought this might be a bit interesting at first glance, but after watching I have a few ideas for projects I want to build. These different circuit blocks are interesting little beginner's tools on their own.
Thanks for a save-the-reference level upload.
-Jake
Hey Rodger, after looking at this in a little more detail, I have one question.
15:01
On IC5 pin 3 (TL082), why is this node connected to the 10k trim pot (R17) of the adjustable high voltage circuit block below? Is the 5V6 zener (D11) just acting as a reference for the high voltage circuit or is there something more to this? If I build the current limiting circuit independently, should there be a 10K resistor in parallel with the zener to ground or just omit the resistor entirely? I'm pretty sure it's needed to act as a voltage divider with the 10K resistor of R9, but I'm not 100%.
Also I guess a 5V6 zener (D11)/voltage reference would be needed for the trim pot to build the adjustable high voltage circuit by itself.
Thanks in advance for any advice ;)
-Jake
D11 creates a 5.6V reference voltage for the upper tab of the pot so that with the middle tab you get a variable voltage between 0 and 5.6V which then goes the inverting input of the OpAmp as a "set voltage"
If you build the current limiting circuit alone you don´t need an extra 10k resistor in parallel to the zener-diode.
That´s the purpose of the zener-diode: to make the voltage across it relatively independent of the load in parallel to it (here: no load or 10k load).
And yes: to build the high voltage circuit alone you need the part with the zener-diode (or another stable 5...6V reference voltage from somewhere else in your circuit)
Hi, welcome back, finally :)
Very cool device. Do you know any new bench device with the same functionality as the ELV TT7000? Thanks in advance
No, I don´t think that there was ever build a device like this in the last 20-40 years.
Schönes Video Roger 👍🏻
Ich baue mir den gerade nach weil ich den Tester leider nirgends finde. Keiner bietet den an. Also, selber bauen.
40 years old instrument are of course not sold any longer by ELV. And you find one on Ebay once every 5...10 years at best.
@@KainkaLabs I meant in used condition. I know that ELV don't sell it anymore 🙂
But I successfully recreated the device and it works 👍🏻
Now I'm going for the Klirrfaktor Messgerät.
Too bad that you don't make more of this videos.
@@KainkaLabs Got one this day! :) Found one on Ebay and it works!! 😁
great job!
if i want to build it myself with arduino, what do i need to do so it will also measure mosfets?
A lot. 2 Computer Controlled Voltage Source, 1 with settable current limit, 2 precision voltage and current ADCs....
@@KainkaLabs computer controlled voltage like LM317?
LM317 is an analog voltage regulator; not a digitally controlled that can be interfaced to an Arduino.
Oops! 5 minutes of black screen at the end! When you started to say bye I thought no there is more but alas there was no more.
Yes. I noticed that only after publishing and couldn´t change it any more.
I wil try to insert a hint that no easter eggs are hidden in the last 5 minutes :-)