Laser Communicator WITHOUT Audio Output Transformer

If you’ve searched around for “How to build a laser communicator“, you probably stumbled across several examples that use the RadioShack Audio Output Transformer, Catalog #: 273-1380.  I’ve built one and it works great, but it’s roughly $3 just for the transformer and finding these things elsewhere is nearly impossible.  They also add unnecessary bulk to the transmitter and we can build it using much cheaper components!
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