Breadboarding A Presentation by Charles A. Schuler author of Electronics Principles & Applications Eighth Edition
Strip #22 solid wire 1/4 inch to 3/8 inch on each end. Four separate buses and 48 separate groups of 5 are shown here. Buses Groups of 5 Groups of 5 Many components have compatible leads. Buses
Buses Group of 5 The front side of a breadboard
Metal strips Metal strips The back side of a breadboard
Continuity No continuity Continuity No continuity No continuity How the groups and buses work
Series circuit + + 1 kW 560 W 470 W
Parallel circuit (with a common mistake) + + 560 W 1 kW 470 W
VCC .47/63 In Breadboarding a transistor amplifier VCC Out Out In
VCC .47/63 In Is this also correct? VCC Out Out In Previous slide
VCC A C A C A digital circuit VCC Observe polarity! Current limit Pull-up
General guidelines: • Do not force wires larger than #20 gage. Add soldered extensions using #22 solid wire. • Use an IC removal tool or use a screwdriver to carefully pry up ICs for removal. • Use buses for power and ground distribution. • Add bypass capacitors to power buses. • Check and recheck before applying power. • Cut off ends and re-strip jumpers when they are worn. • Do not breadboard high power, high current or high voltage circuits. • RF circuits usually won’t work properly, if at all. • Keep high gain circuits inline and avoid long jumpers. • Adapters are available for SMT devices.
You can’t breadboard SMT devices? Right? Wrong? You can, for some devices, but you will have to mount them on an adaptor or solder them to an adaptor such as the one shown below. Breadboarding has largely been replaced by circuit simulators. Not for education, though. For learning the basics, the ability to make one’s own connections and then experience the results is still a very valuable endeavor.