This is a remote controller using HT12 integrated circuits which is widely used in robotic application where in momentary mode, 4 channels are available. Receiver side is equipped with four relays at the out put which can be wired in any configuration for the required operation. Individual addresses can be selected to operate more than one remote kit at a time. The kit is capable of controlling forward and reverse directions of 2 individual motor at the same time at 5 amps maximum per channel.
The circuit comprises the R.F. Transmitter & R.F. Receiver pair to transfer the coded data encoded by the integrated circuit HT-12E the transmitted data is received by the receiver circuit & decoded by the other integrated circuit HT-12D. The data then decoded is passed to the Darlington transistor array module ULN2003 which drives 4 electro-magnetic relays. Relay can be used to drive any loads like Bulb, Pumps, Fans, Blowers, or Motors.
Bi-Directional controlling of DC motor can be done with this circuit using 2 relays per Motor, thus 2 motors can be controlled by this kit. Click here for wiring diagram of the Bi-directional controlling of motors. Connection of One motors is shown in the schematic. Connections to the other motor identical.