Cytron Technical Forum

Hi, i need some help here.. i want to add lamp in this project.. where should i place this lamp? can i replace this lamp with led1? did i need to modify the source code? i think if i want to add the lamp, i need to use relay, then what type of relay that i can be used for this circuit and what type of lamp suitable for this circuit. if i can add this lamp here, can i delay the time for the lamp to switch on after the buzzer has been activated. Thank You so much for the information.. sorry for the inconvenience..

similar to buzzer, relay will need a BJT to drive.
Relay at least consuming 40 to 50mA so normal microcontroller pin cant afford to drive it. add a flyback schottky diode to the terminal for the flyback current.

if u want delay u will need writing code for the microcontroller.

Thank You so much for the information..