... fastened to awooden board to see how well a circuit would perform. To provide a quickcheck to see if a given circuit wouldwork, parts were screwed or nailed to a board. Wires were twisted onto ter-minals, ... example; shown arepatternsfor TO- 5, TO- 18 and TO- 92 transistors; all three leads are transferredtogether with proper spacing between leads But for 1/4 watt resistors and small capacitors, donut ... soldered.Today we have SolderlessPrototype boards for testing circuit ideas. Parts are simply plugged intoone of these boards with no perma-nent connections, such as soldering.The circuit...