Equivalent components (Relay)

RLA is stand for relay. This body detector consist of component such relay with value 5v p.c.b mounting miniature relay 200mW operating power (2-pole changeover). A variety of miniature relays would be suitable as long it provide that the nominal operating power does not exceed 500mW. The output of monostable IC2b at pin 9 provides current for switching transistor TR2, which in turn controls relay RLA. The actual relay that suppose be use in this circuit is the large one that it is almost same like potentiometer. But since the size was too large for the circuit, then we decide to change it with the another type of relay. We replace it with the same power and value, it just the shape that different which is the second one that we replace is rectangular shape blue colour. This relay will be trigger with "crackle" or "click" sound when it functional in the circuit. Since that, it show that the relay is functional work.