🆗⚡ 220V Soft Start module for amplifiers and more: assembly and connection. Soft Start DIY

Опубликовано: 30 Август 2026
на канале: ▶️ Radio-Lab UA

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✅ $2 for 1-4 Layer PCBs, Get SMT Coupons: https://jlcpcb.com/DYE

⏩ Hello everyone! This video shows the assembly of a simple "Soft Start" module. This module is designed to reduce the inrush current of a transformer power supply with large capacitors when powered from a 220V network.

⏩ Link to the archive with Gerber and LAY files:
https://drive.google.com/drive/folder...
(Where there are 6 boards, there's also reverse polarity protection, 2 adjustable LM317t voltage regulators, and 2 LM335 temperature sensors)

⏩ Author's article:
https://cxem.net/sound/amps/amp158.php

⏩ Links to some radio components:
✅ https://fas.st/8vYNf - radio components store (has almost everything)
✅ https://fas.st/iFQoa - 0.25W resistors
✅ https://ali.ski/Oj8JK - 1N4007 diodes
✅ https://ali.ski/HYKWS - 1N4148 diodes
✅ https://ali.ski/4i_rWO - 18V 1W zener diode
✅ https://ali.ski/tb9p4 - fuse holder
✅ https://ali.ski/yyswgN - BD139 transistors
✅ https://ali.ski/WuPkZq - 12V relay
✅ https://alii.pub/5y9ohv - 5.08-301-2P terminal blocks
✅ https://ali.ski/jpWdUV - 0.47μF 600V capacitor
✅ https://ali.ski/hU4LTB - 220μF 25V capacitors

✅ https://ali.ski/yOJJ4 - LCR-T7 ESR tester
✅ https://ali.ski/ULFBAm - LCR-T4 ESR Tester
✅ https://ali.ski/B7gmNx - POS60 Solder
✅ https://ali.ski/h4ywOz - FR4 PCB

⏩📲 https://fas.st/kRIzr - GVDA GD128 Smart Multimeter

⏩ Building a Power Filter with a Diode Bridge
   • ⚡ Сборка Двухполярного блока питания +/-20...
⏩ Building an Amplifier on a TDA7294 Microchip
   • 🔊 Hi-Fi усилитель мощности звуковой частот...

⏩ Mini Tabletop Circular Saw (for cutting PCBs)
   • 🔁Настольный Циркулярный станок для резки п...

💲For cheap support💲
👉 https://donatello.to/RadioLab
👉 https://send.monobank.ua/jar/6dKFDUky7i

Thank you for your time!

Timing:
00:00 - Introduction
00:50 - Ordering JLC PCBs
02:32 - Assembling the Soft Start module
05:28 - Assembled Soft Start
05:48 - Connecting the 220V power supply
06:28 - Connecting to the transformer
07:18 - Operating principle of the Soft Start
07:36 - Connecting and operating the amplifier
09:25 - Conclusions
10:47 - Thermal imager view
10:57 - Conclusions and recommendations