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LM338K 3-Digit Digital Display Step Down Buck Converter 3A Power Supply Module Voltage Regulator DIY Kit

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Parameters:
Circuit Board Size: 9.6*5.8CM (L*W)
DC input: 3-35V;
AC input: 1-25V;
DC output:1.2-30V;
Maximum Current: 3A
Input and output the minimum differential pressure: 3V;
Maximum power consumption: 50W;

Component Listing:

NO. Component Name Quantity
1 PCB 1
2 KF301-2 1
3 terminal(red and black) 1
4 1N4007 3
5 KBL608 1
6 200ohm 1W resistor 1
7 4.7K ohm resistor 1
8 3MM blue LED 1
9 104 capacitor 3
10 50V100UF capacitor 1
11 50V2200UF capacitor 1
12 50V4700UF capacitor 1
13 101 switch 1
14 Potentiometer knob 1
15 Potentiometer stents 1
16 M3*6 screw 2
17 5K Potentiometer and the screw nut 1
18 LM7812 1
19 338K Heat sink 1
20 12V fun 1
21 LM338K 1
22 30V3A PPTC 1
23 M3*50MM screw 4
24 3MM nut 20
25 20mm copper cylinder 4
26 4MM copper sheet 4
27 4MM nut 2
28 4*10 screw 2


Diagram:




Finished Product:




I. Tested by ICStation's Outstanding Partner Ideatronic:

Learn More Details in the Video:
(The language in the video is Spanish)

 

II. Tested by ICStation's Outstanding Partner CarlosVolt Tutoriales:

https://rogerbit.com/wprb/2018/06/review-fuente-de-alimentacion-regulada-de-1-2-a-30-voltios-con-lm338k-icstation/

Learn More Details in the Video:
(The language in the video is Spanish)

Feedback

By
Rating: [5] 5 of 5 Stars! Date Added: 2021-02-18 16:40:15
Bought & built this kit. Worked ok for 3 days, then the LM338k MIL (TO-3 housing) failed. Replaced it with an LM338t (TO-220), now it works ok again. I also used another 3-wire display, with the display's V+ to the LM7812 output and the Vin to the LM338 output so it is always visible and does not fade with low output voltage. Also made the switch in the AC power supply instead of DC output.

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LM338K 3-Digit Digital Display Step Down Buck Converter 3A Power Supply Module Voltage Regulator DIY Kit
$7.69
$10.99
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