MP3 Trigger icon MP3 Trigger — Serial MP3 Trigger for EZ-B: plays MP3s from mini‑SD; configurable port/baud. Deprecated-replaced by EZB v4 streaming audio. 3rd‑party. Try it →
Tutorial
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Steps

  1. Parts Needed.
  2. Schematics.
  3. Step 1. Method:
  4. Step 2.
  5. Step 3.
  6. Step 4.
  7. Step 5.
  8. Step 6.
  9. Step 7.
  10. Step 8.
  11. Step 9.
  12. Final Step.

Tip120 & Tip122 Transistor Switching Circuit

Step 8 of 12
Step 6.

10.) Job done. Plug the servo Extension in to a Digital port on the EZB and connect the circuit that needs switching to the Pin Header, I do this with another servo Extension (as I have hundreds of them).

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Or a JST connector works very well also...

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