Handicraft for handy boys; : practical plans for work and play with many ideas for earning money, (1911)
Hall, A. Neely (Albert Neely), b. 1883, Hall, Norman P., ill · Boston, : Lothrop, Lee & Shepard · leaf 293
set in between the detector and the switch (Fig. 326). If you have constructed the siUcon detector first anddo not care to use any of the other forms described, itwill not be necessary to make A Potentiometer, but with a microphone detector youwill require one. Its purpose is to regulate with… … Fig. 324. — A Home-made Potentiometer.(See Fig. 326.) be wound with German-silver wire instead of copper.This wire v/ill not be expensive to buy, as about twoounces will be enough, and this amount costs about25 cents. A piece of a i|^-inch curtain- or rug-pole 8inches long is of ample size for the…
Woodwork · Toys · Amusements
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