Adventskalender 2020: das erste Türchen

MB 102 breadboard kit with breadboard, power supply adapter and jumpers

Welcome to the start of our advent calendar. This month there will be a great special offer hidden behind the door every day combined with a small blog post. We would like to address especially young and young at heart makers who want to get to know the world of microelectronics. We start with a "must have" for test setups.

The breadboard kit is ideal for prototyping smaller projects. This means that you can build circuits without having to solder or screw. Resistors, capacitors, potentiometers, light-emitting diodes, sensors, ICs or microcontrollers can easily be plugged onto the breadboard. The connection contacts are used for this:

The spacing of the contacts matches many available components. They are internally connected to each other. The inside lying across, the outside lengthways. In this variant, the outer contact lines are interrupted in the middle. Also recognizable by the not continuously drawn red or blue lines:

This has the advantage that you can e.g. four different voltages can be applied to a breadboard, or you can use these contacts as a distributor.

The kit includes a converter for external voltage sources in the form of a power supply adapter. This can be plugged directly onto the board so that the outer contacts can serve as a voltage source for the components attached in the inner area:

Note: Make sure that the + and - labels on the breadboard do not match that on the power supply when the power supply module is placed on the other side.

With the yellow outer jumpers (bridges) you can choose between 3.3V or 5V output voltage separately for one of the two sides. Some sensors must e.g. supplied with 3.3V. Other components need 5V at their voltage input. Four additional header pins are used to tap the voltage directly on the module. Here, too, either 3.3V or 5V. The current at the output is a maximum of 700mA.

The power supply module has an input that can be supplied with a voltage between 6.5V and 12V. A 9V block or several AA batteries connected together are often used here. Of course also laboratory power supplies or other devices.

Some micro controllers require a USB cable for power supply. This can be connected to the USB socket on the adapter.

The switch on the module is handy because you don't have to pull out the cable to turn it on and off. The green LED shows the respective status.

The breadboard offers other features. It can be dismantled and expanded. If you don't need the external contacts, you can remove them:

Or you can add another breadboard in order to be able to attach more components:

The breadboard can be expanded as required. There is an adhesive surface on the back so that it can also be attached to a suitable surface.

You are already well equipped for the first projects (even without a micro controller). Finally, a picture of a small test setup:

The output on the power supply is set to 5V. This supplies the lower left side with 5V. I bridged the middle with the cables provided. The LED is lit up via a series resistor and a small switch. There are 3.3V on the upper left side of the breadboard, which are not used at the moment. You could also put the jumper in the middle to get 0V.

And this is what it looks like as a circuit diagram. For this we use the Fritzing software, which we use in a previous blog series have already presented.

We wish you a nice Advent season.

Andreas Wolter

for AZ-Delivery Blog


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