In the middle of the breadboard is an insulating "ditch" so that the pins on the chips both long sides are isolated from each other. This corresponds to a connection point (a node) in a wiring diagram. The contact springs are in groups of five holes vertically. Connector cables can then be entered in the holes to pass on the connection to other pins. On the underside there are contact springs of metal that electrically connects to the pins and for further connection to four additional holes.
The chips are inserted in the holes on the plastic isolated side. To the right is a picture of the coupling underside of the deck with the contact springs visible, and a picture of a contact spring for five holes.īreadboard at the lab. Supply voltage and ground are already connected to circuitry on the labequipment. They should therefore always be connected to an appropriate fixed level 1/0 depending on the function.īreadboard at the lab. Unconnected inputs picks up electrical interference and must therefore also be considered unsafe 1/0 (?). It will be a so-called short-circuit and the output value becomes uncertain 1/0 (?). Two outputs may not be connected with each other. The pin function is stated in the data sheets, and to some extent also in the symbols in the figures. Two of the pins should be connected to the supply voltage and ground and the other pins are used as logic inputs and outputs, sometimes a pin can lack connection to the inside of the chip, it is then called NC (no Connection). For orienting the capsules they have an outlet on the short side, and there can also be a "dot" to mark the pin number 1. The digital components have capsules with 14 or 16 pins.
Anyone interested can download it now.ħ4HCT00.fzpz 74HCT02.fzpz 74HCT08.fzpz 74HCT32.fzpz 74HCT86.fzpz (This program will be used in the course IE1206 but is not needed for this course).
Working with circuits on the breadboard is therefore the natural working method for project work and theses for school and hobby activities.įritzing Is the name of a software for documenting breadboard connections, and generate circuit diagrams, and possibly manufacture printed circuit boards. Breadboard are now also used with very complex circuits - then mounted on Breakout Board (a breakout board has the same pin spacing DIL) circuits. These old circuits, are however unbeatable for experiments with simple connections on the breadboard. This is today considered to be pure spare parts, and development has changed to completely different package types for surface mounting. Chips and BreadboardĪt the labs, we use digital circuits from the so-called 74-series of capsules of the DIL type (Dual In Line) for hole PCB assembly.