"...something that looks *THAT* good..." ))) That brought a smile to my face! I'm an electronics hobbyist and I really enjoy your approach. You're willingness to just "do it" is refreshing. Well done!)))
@@electrarc240 Still waiting - but love the feeds on basic components. Can you look at some high Voltage/current pieces and explain why it is more than just heat dissipation please.
@@electrarc240 do you think that the matching of the photodiodes or the coupling of them to the LEDs to get equal light was the issue? I wonder if a 3d printed mount would help to get them to match or characterise them.
I recon it must have been more than one thing for it to be that bad, but yeah alignment was definitely the biggest issue cause as i mentioned the photodiode used for feedback was working fine. A 3D printed mount would definitely be better than just a load of tape haha
Use chrome decoration tape (=plastic) around the two IR LEDs and finally use heatshrink to seal it. This will increase the sensitivity and makes it more accurate. I use this method to make Vectrols (commercial name), a LED and a LDR.
If you are still toying with this circuit you can increase the photon transfer by sanding the top of the led and photoled flat just avoid hitting the semiconductor or bond wires
Fun making a DIY opto coupler, but I felt it took you away from the original goal of the video. Yeah you covered it essentially, but you kind of whizzed through the opamp section because you were keen on the DIY part. Then you spent ages measuring the performance of that DIY part, and it all kind of went off the tracks. The DIY opto would have made a great extra video though!
5:49 schematics shows photo transistor, not a diode for some reason, btw. Now, remembering that it is a diode, the source of non-linrarity is probably opamp input bias current which becomes significant at lower diode output voltages. So maybe try FET-input opamp.
"...something that looks *THAT* good..." ))) That brought a smile to my face! I'm an electronics hobbyist and I really enjoy your approach. You're willingness to just "do it" is refreshing. Well done!)))
You popped up on my main feed, I love this kind of content! I especially enjoy how fast paced and eloquently you narrate.
Thank you!
same-sies! looks like hes buying a vishay opto. i was like #67 and its been merely a week.
This video has been far more popular that I anticipated haha! It will be ordered in the next few days
@@electrarc240 Still waiting - but love the feeds on basic components. Can you look at some high Voltage/current pieces and explain why it is more than just heat dissipation please.
@@NoelWillis Will do soon. Just sorting out acquisition of some HV kit
Very educational and fun to watch as well. I like hw you explain why things don't work as expected and the work-arounds
I had such high hopes for the closed loop circuit! Great video.
Same, my disappointment was immeasurable and my day was ruined! I probably will end up buying the Vishay one just to see how good it can be.
@@electrarc240 do you think that the matching of the photodiodes or the coupling of them to the LEDs to get equal light was the issue? I wonder if a 3d printed mount would help to get them to match or characterise them.
I would trust that the Vishay would be awesome 😄
I recon it must have been more than one thing for it to be that bad, but yeah alignment was definitely the biggest issue cause as i mentioned the photodiode used for feedback was working fine. A 3D printed mount would definitely be better than just a load of tape haha
I like the aesthetics of the second DIY optocoupler... "strange misshapen brown blob" has a nice vintage "valve-radio" look about it. ;)
You got yourself a new fan❤️
Masterful presentation!
Love your work! Subscribed
Thanks!
Great video
Thanks!
Use chrome decoration tape (=plastic) around the two IR LEDs and finally use heatshrink to seal it. This will increase the sensitivity and makes it more accurate. I use this method to make Vectrols (commercial name), a LED and a LDR.
very interesting to see cobbled together electrical components and unforeseen consequences..
Good work, thanks 👍!
The videos get better each upload. Any hints on when part 3 will be coming out?
Whenever I have the time. I’m aiming for uploads at least once a week
👍👍
If you are still toying with this circuit you can increase the photon transfer by sanding the top of the led and photoled flat just avoid hitting the semiconductor or bond wires
the best than tape is a foil, i think... thanks for the videos!
Thank you!
Fun making a DIY opto coupler, but I felt it took you away from the original goal of the video. Yeah you covered it essentially, but you kind of whizzed through the opamp section because you were keen on the DIY part. Then you spent ages measuring the performance of that DIY part, and it all kind of went off the tracks.
The DIY opto would have made a great extra video though!
Honestly the original output looks very *linear* between 0.5V and 4V just not 1:1, how much would it help to just add a second trim-pot for offset
Yes I thought that too. I did consider adding an offset trimmer, but decided to just keep things simple here.
5:49 schematics shows photo transistor, not a diode for some reason, btw.
Now, remembering that it is a diode, the source of non-linrarity is probably opamp input bias current which becomes significant at lower diode output voltages. So maybe try FET-input opamp.