PR14 ALARM SYSTEM: MOTION DETECTOR

LED Blinking, Walking with Cytron Servo, Displaying RFID, Multi-function Mobile Robot......

PR14 ALARM SYSTEM: MOTION DETECTOR

Postby an2lie » Sat Sep 22, 2012 11:48 am

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.. :)
an2lie
Greenhorn
 
Posts: 2
Joined: Sat Sep 22, 2012 11:29 am

Re: PR14 ALARM SYSTEM: MOTION DETECTOR

Postby yonghui » Sat Sep 22, 2012 1:48 pm

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.
thanks&regards,
yh
yonghui
Moderator
 
Posts: 732
Joined: Mon Sep 28, 2009 3:27 pm

Re: PR14 ALARM SYSTEM: MOTION DETECTOR

Postby an2lie » Sun Sep 23, 2012 2:37 am

Thank You so much for the information..
an2lie
Greenhorn
 
Posts: 2
Joined: Sat Sep 22, 2012 11:29 am


Return to DIY Project Set

Who is online

Users browsing this forum: No registered users and 1 guest

cron