Uploaded March 2021 | Updated September 2026, 1 week ago
#112 In this video I continue working on the LM317 high voltage supply by adding a current limit circuit. First I look at a few ways in which the circuit does not work, and then, after looking at the core issue in more detail I get a circuit up and running that no longer brakes instantaneously...
Updated schematic: drive.google.com/file/d/1osBddJWAdd0cnp_jxC6LgksQH36A0cQg/view?usp=sharing
More in this mini-series:
Part1: youtu.be/Qud914Pqlqs
Part2: youtu.be/hp2wc6N_vYs
Part2b: youtu.be/lF8OAZ45Pw8
Datasheets:
onsemi.com/pdf/datasheet/lm317l-d.pdf
tdk-electronics.tdk.com/inf/55/db/PTC/PTC_OC_Leaded_230V_C810_C890.pdf
https://www.tme.eu/Document/7eef32ba0e06f06ac87182b720a77de2/NTCC-1K.pdf
Special Thanks to all my supporters on Patreon! Especially @afiskon and Ralf B.!
If you liked this video be sure to check out my other videos and you can also subscribe to be up to date with all the new ones!
If you want to support the creation of more and better videos please consider checking out: patreon.com/feszelectronics
#112 In this video I continue working on the LM317 high voltage supply by adding a current limit circuit. First I look at a few ways in which the circuit does not work, and then, after looking at the core issue in more detail I get a circuit up and running that no longer brakes instantaneously...
Updated schematic: drive.google.com/file/d/1osBddJWAdd0cnp_jxC6LgksQH36A0cQg/view?usp=sharing
More in this mini-series:
Part1: youtu.be/Qud914Pqlqs
Part2: youtu.be/hp2wc6N_vYs
Part2b: youtu.be/lF8OAZ45Pw8
Datasheets:
onsemi.com/pdf/datasheet/lm317l-d.pdf
tdk-electronics.tdk.com/inf/55/db/PTC/PTC_OC_Leaded_230V_C810_C890.pdf
https://www.tme.eu/Document/7eef32ba0e06f06ac87182b720a77de2/NTCC-1K.pdf
Special Thanks to all my supporters on Patreon! Especially @afiskon and Ralf B.!
If you liked this video be sure to check out my other videos and you can also subscribe to be up to date with all the new ones!
If you want to support the creation of more and better videos please consider checking out: patreon.com/feszelectronics
![EMC tutorials - [2/3] Testing the LISN](https://i.ytimg.com/vi/nq-IhHbZdD0/mqdefault.jpg "EMC tutorials - [2/3] Testing the LISN
#117 In this video I start testing the LISN to see just how good it is. I look at multiple things starting with output impedance then go for insertion loss, input impedance and input side filtration and finally look at inter-channel isolation or cross talk.
More on the topic:
Part 1: https://youtu.be/OEvkRW5vZNA
Part 2: https://youtu.be/nq-IhHbZdD0
Part 3: https://youtu.be/M_ab0Oz2ypI
Website with CISPR limits:
https://www.com-power.com/products/lisns/li-3100
Further reading:
AN-7_Measuring_a_Line_Impedance_Stabilization_Network(LISN) - https://coretechgroup.com/wp-content/uploads/2017/01/AN-7_Measuring_a_Line_Impedance_Stabilization_NetworkLISN.pdf
Special Thanks to all my supporters on Patreon! Especially @afiskon and Ralf B.!
If you liked this video be sure to check out my other videos and you can also subscribe to be up to date with all the new ones!
If you want to support the creation of more and better videos please consider checking out: https://www.patreon.com/feszelectronics")
