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added 53 characters in body
Transistor
  • 180.4k
  • 14
  • 194
  • 417

Oops! This isn't correct yet. Deleting until fixed.

schematic

simulate this circuit – Schematic created using CircuitLab

Figure 1. An extra contact solves the problem.

Transistor
  • 180.4k
  • 14
  • 194
  • 417