Updates and additions to an earlier video Adjustable LM317 High Powered Current Source at • Adjustable LM317 High ... Webpage: www.bristolwatch.com/ccs/LM317...
Mr. Loflin, as usual I am so pleased to watch you explain so well circuits in general, including this updated one. Please keep on producing more videos as you are a wonderful teacher for so many practical electronic stuff for all hobbyist, and enthusiasts like me. Of course I have subscribed a long time ago now, and created special links of interests pointing at your videos.
Newbie here. How can this be adjusted to be current limiting device. I want to test broken motherboards with voltage injection (usually 1 up to 5 volts) but need to protect the motherboard from too much current (100ma to 1000ma range). How would this be achieved ? Can you make video about this?
Great video. In regards to the PNP power transistor used, if I require a higher input voltage of say 200VDC and output current of 8 - 10 amps, could I swap out the single PNP power transistor for a Darlington Transistor? Also the LM317 would be changed to LR8NS
About 25 years ago I assembled a circuit exactly similar to your first schematic. The output current varies by more than 10% depending on the temperature of the transistor. This phenomenon disrupts the performance of the device I built.
Pl make a video on foldedback current and its calculation of resistors ( linear regulated power supply with short circuit protection as fold back current limit).
Mr. Loflin, as usual I am so pleased to watch you explain so well circuits in general, including this updated one. Please keep on producing more videos as you are a wonderful teacher for so many practical electronic stuff for all hobbyist, and enthusiasts like me. Of course I have subscribed a long time ago now, and created special links of interests pointing at your videos.
Newbie here. How can this be adjusted to be current limiting device. I want to test broken motherboards with voltage injection (usually 1 up to 5 volts) but need to protect the motherboard from too much current (100ma to 1000ma range). How would this be achieved ? Can you make video about this?
Just wondering why you deleted my comments about the cadex battery site?
Great video. In regards to the PNP power transistor used, if I require a higher input voltage of say 200VDC and output current of 8 - 10 amps, could I swap out the single PNP power transistor for a Darlington Transistor? Also the LM317 would be changed to LR8NS
can you make an ac current source using this and pwm ?
Thanks for sharing your knowledge
dear sir please explain about the capacitor on the point 3 of lm 317?????
About 25 years ago I assembled a circuit exactly similar to your first schematic. The output current varies by more than 10% depending on the temperature of the transistor. This phenomenon disrupts the performance of the device I built.
This is an update to an earlier video on the LM317-transistor combo at
Good info.
Pl make a video on foldedback current and its calculation of resistors ( linear regulated power supply with short circuit protection as fold back current limit).
why did you use pnp transistor for Q1 ? which better to use NPN or PNP ?
Lead Acid battery and Lithium ion battery are the same charging strategy or different?