EduTecBox with time relays

EduTecBox with time relays is an educational box containing three independent time relays and two power buses. The functions of the three time relays are: ON-DELAY, OFF-DELAY and PULS. Each time relay contains two tilting electrical contacts. The two tilting contacts are mechanically connected to each other. The time relays each have a potentiometer that changes the time value.
The time relay coils each contain one LED. The LED is part of the coil protection circuit and signals its power supply. All terminals can be used with 4 mm insulated banana connectors.