<p>Is it wrong for an unsupervised 10-year-old kid to make a solar cell using asbestos, phosphorous, and a 2,600-degree furnace? Well, it turned out fine for me, but I never let any of my kids even come close to doing this.</p>

Is it wrong for an unsupervised 10-year-old kid to make a solar cell using asbestos, phosphorous, and a 2,600-degree furnace? Well, it turned out fine for me, but I never let any of my kids even come close to doing this.

Building my first P-N junction semiconductor

True stories about technologies I've used over the past fifty years. From 4-bit, Intel 4004 microprocessors to the marvel of op-amps to building an interface to an HP-3000 in a rat-infested animal feed company.

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Building my first P-N junction semiconductor

Building my first P-N junction semiconductor