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Spot Welder & Bag Sealer Timer Board

This is a simple Timer and SSR board to implement in the well known DIY MOT spot welder, and also is meant to replace a bag sealer board.

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This board is based on the 555 Timer in Astable configuration and integrates an SSR based in the commonly availible BTA25600B (for the spot welder) or the BTA12600B (for the bag sealer), isolated from the timer with an MOC3052 opto-triac.
I made both, smd and tht versions of the boards.

Kicad Project.zip

Kicad Project Files with 3D models included

Zip Archive - 309.17 kB - 10/05/2022 at 19:11

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SporWelderTimer.tar.gz

Gerber Files

gzip - 49.54 kB - 10/05/2022 at 19:09

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  • 1 × NE555 (PDIP) Discrete Semiconductors / Power Transistors and MOSFETs
  • 1 × MOC3052 (PDIP) Opto and Fiber Optic Semiconductors and ICs / Optocouplers and Optoisolators
  • 1 × BTA25600B Discrete Semiconductors / Thyristors (DIACs, SIDACs, TRIACs, SCRs)
  • 1 × 47uF 16V Capacitor
  • 2 × 10nF Ceramic Capacitor

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