Portable and interconnectable trainers

A system, comprising:

• a plurality of trainers comprising first and second trainers, wherein the first trainer is an electronics trainer comprising:
• a set of one of more output terminals configured to provide electrical output signals to control one or more electronic devices on one or more other trainers of the plurality of trainers;
• a signal distribution relay, comprising:
• an output port connected to a first output terminal in the set of output terminals of the first trainer;
• a first input port configured to receive a first electrical signal;
• and
• a second input port configured to receive a second electrical signal;
• wherein the signal distribution relay connects or disconnects the first input port of the signal distribution relay to or from the output port of the signal distribution relay based on a voltage level of the second electrical signal;
• and
• a breadboard comprising a plurality of connectors configured to receive electronic components pins and connector wires of a user-designed circuit;
• wherein the second trainer comprises a set of one of more input terminals;
• wherein the second input port of the signal distribution relay of the first trainer is configured to receive a signal from the user-designed circuit on the first trainer;
• wherein a first output terminal in the set of output terminals of the first trainer is connected to a first input terminal in the set of input terminals of the second trainer;
• and
• wherein the user-designed circuit on the first trainer controls an electronic device on the second trainer by providing electrical signals to the electronic device on the second trainer through the first output terminal of the first trainer and the first input terminal of the second trainer.