Many variants of the scheme is available and all is working. One these is below:

Used material:

• PCB 100x50
  https://www.gme.cz/v/1508537/cu-ta-040-univerzalni-spoj-vrtany-100x50mm
• LM317
  https://www.gme.cz/v/1488537/stmicroelectronics-lm317t-dg-linearni-stabilizator-napeti
• Voltmeter (3 wire)
  https://www.gme.cz/v/1504652/digitalni-voltmetr-0-999v-dc-3-draty
• XT60 socket for panel
  https://www.tme.eu/cz/details/xt60e1-m/konektory-dc/amass/xt60e1-m-xt60e-m/?brutto=1¤cy=CZK&utm_source=google&utm_medium=cpc&utm_campaign=CZECHY%20%5BPLA%5D%20CSS&gad_source=1&gad_campaignid=9886211519&gbraid=0AAAAADyylhL_7bWtOEWPfGazh3bIAY1gD&gclid=Cj0KCQjwrc7GBhCfARIsAHGcW5WI0pWT26xYAXN9ZVN2NIwmK4Qwjc3JFyTGIX8uCEmbRkF4TU-N4XoaAg7kEALw_wcB
• potentiometer 5k
  https://www.gme.cz/v/1494572/pc1621nk005-potenciometr
• potentiometer knob
  https://www.gme.cz/v/1500337/kn-8f-knoflik-plastovy-prumer-155mm-osa-6mm-cerny
• jack socket 5.5x2.1
  https://www.gme.cz/v/1501923/ds-241b-dc-konektor-55-21
• terminal block / wire clamp
  https://www.gme.cz/v/1497551/kls-306v-500-02p-3-sc-svorkovnice-2pol-roztec-5mm-16a-250v-vstup-90-sroub
• heatsink
  https://www.gme.cz/v/1500924/assmann-v4330n-chladic
• 2x diode 1N4007
  https://www.gme.cz/v/1493670/1n4007-dioda
• resistor R240
  https://www.gme.cz/v/1488125/gym-cym-rm-240r-06w-1-0207-metalizovany-rezistor
• 1x capacitor 10uF
  https://www.gme.cz/v/1489562/hitano-ce-10u-50v-hit-ecr-5x11-rm2-bulk-elektrolyticky-kondenzator
• 2x capacitor 100nF
  https://www.gme.cz/v/1489722/gym-cym-ck-100n-63v-x7r-rm508-20-keramicky-kondenzator
• 1x capacitor 470uF (better to use 2pcs in parallel)
  https://www.gme.cz/v/1489694/hitano-ce-470u-35vt-hit-ehr-10x16-rm5-bulk-elektrolyticky-kondenzator
• polyswitch (optional)
  https://www.gme.cz/v/1512430/littelfuse-ruef135-vratna-pojistka-polyswitch
• thermal fuse (optional)
  https://www.gme.cz/v/1511767/df77s-l-axialni-tepelna-pojistka
• 4x wood screw 3x30
   

For high load is better to use bigger heat sink.
As a power source is 12-24VDC/1,5A
https://www.gme.cz/v/1506754/mean-well-gsm36b24-p1j-sitovy-napajeci-adapter