DIY 3 in 1 Siren | Police | Ambulance in just RS 35/- only 

You can add a selection switch instead of jumpers

I don't live in Delhi Am from punjab

I don't use soldering gun I use RS pro Soldering station

@@TEKNOISTIX Ok Thanks Sir 🙏

I will try it soon

Will try

I got it in rs 30 from a local market in punjab

Try local market in your area

Will try

i will try

@@TEKNOISTIX Yes, i also saw that video, you made using 555 ic but you did not put feedback in it, please try to put feedback in it, please, it is very important.

another high frequency signal will be generated, i have just tried after reading your comment. 😅

int relay1=5; int relay2=6; int relay3=7; int relay4=8; int rfA=9; int rfB=10; int rfC=11; int rfD=12; int sw1=0; int sw2=0; int sw3=0; int sw4=0; void setup() { serial.begin(9600) ; serial.peginIn("Hello"); pinMode(relay1,OUTPUT); pinMode(relay2,OUTPUT); pinMode(relay3,OUTPUT); pinMode(relay4,OUTPUT); pinMode(rfA, INPUT); pinMode(rfB, INPUT); pinMode(rfC, INPUT); pinMode(rfD, INPUT); /*// powersupply for RF Module PinMode (19,OUTPUT); digitalWrite(19,LOW); PinMode (18,OUTPUT); digitalWrite(18,HIGH); */ } void loop() { int A=digital read (rfA); int B=digital read (rfB); int C=digital read (rfC); int D=digital read (rfD); if (A==1){ if (sw1==0) (sw1=sw1+1; digitalWrite(relay1,HIGH); Serial.printIn("Relay 1 High");}else {sw1=sw1-1;digitalWrite(relay,1LOW); Serial.printIn("Relay 1 LOW");}delay(500);} if (B==1){ if (sw2==0) (sw2=sw2+1; digitalWrite(relay2,HIGH); Serial.printIn("Relay 2 High");}else {sw2=sw2-1;digitalWrite(relay,2LOW); Serial.printIn("Relay 2 LOW");}delay(500);} if (C==1){ if (sw3==0) (sw3=sw3+1; digitalWrite(relay3,HIGH); Serial.printIn("Relay 3 High");}else {sw3=sw3-1;digitalWrite(relay,3LOW); Serial.printIn("Relay 3 LOW");}delay(500);} if (D==1){ if (sw4==0) (sw4=sw4+1; digitalWrite(relay4,HIGH); Serial.printIn("Relay 4 High");}else {sw4=sw4-1;digitalWrite(relay,4LOW); Serial.printIn("Relay 4 LOW");}delay(500);} }

Will try

Very good

i brought it for RS 30 from local market

true it is 35-40 rs