Tex
New Member
- Joined
- Dec 16, 2019
- Messages
- 82
Ok, so I have dug out and old power supply based on an LM338 I made (under instruction) years ago, the original transformer died, so I just cut all the wires and kept the electronics back then.
I am now trying to resurrect it with a new transformer, partly with the intention to use it to charge various Lipo packs I have built with various voltages.
My issue is I have assembled it as best I could recall with reference to a few schematics (not my long suit). The first issue is it has a few extra components I was advised to use when I originally built it just to add to the confusion, the second issue is it is not working correctly, starts at about 2 volts and drops instead of raising on a 16 volt supply.
I did a very rough schematic (see attachment) to try to verify the layout, but I am now just giving myself a headache.
I'm pretty sure the LM338 is ok, so my question is can anyone run their eye over the attachments and tell me if they see an obvious mistake please?
I am now trying to resurrect it with a new transformer, partly with the intention to use it to charge various Lipo packs I have built with various voltages.
My issue is I have assembled it as best I could recall with reference to a few schematics (not my long suit). The first issue is it has a few extra components I was advised to use when I originally built it just to add to the confusion, the second issue is it is not working correctly, starts at about 2 volts and drops instead of raising on a 16 volt supply.
I did a very rough schematic (see attachment) to try to verify the layout, but I am now just giving myself a headache.
I'm pretty sure the LM338 is ok, so my question is can anyone run their eye over the attachments and tell me if they see an obvious mistake please?
Attachments
-
Adjustable-Voltage-Regulator-using LM338 (1).jpg218.1 KB · Views: 8
-
Adjustable-Voltage-Regulator-using LM338 (1).png25.5 KB · Views: 8
-
Adjustable-Voltage-Regulator-using LM338 (4).jpg229.8 KB · Views: 7
-
Adjustable-Voltage-Regulator-using LM338 (5).jpg165.6 KB · Views: 4
-
Adjustable-Voltage-Regulator-using LM338 (6).jpg259.4 KB · Views: 6
-
LM338 charger.jpg250.8 KB · Views: 7