EduTecBox with relays

EduTecBox with relays is an educational box containing three independent electromechanical relays and two power supply buses. Each relay contains three tilting electrical contacts. The three tilting contacts are mechanically connected to each other. Each relay coil contains one LED. The LED is part of the coil protection circuit and signals its power supply.
All terminals of the three relays can be used with 4 mm insulated banana connectors.