Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.
Hi, please disregard my last post about voltage rating of capacitor.
My question now is, can I use an adapter instead of 9v battery as a power supply? Or should I modify my circuit to be able to use an adapter? What adapter should I use?
Sir, I started to buy some of the components for my project. When I buy the capacitor, they asked me the volt value.
My question is, what volt of 100uF and 0.1uF capacitor do I need for this project? TIA.
No sir, I already figure out your modification in your post at post#9 and changing the value of resistor and capasitor. Now I can start my own project. Thanks a lot for your help. But if you would draw a schematic of the second one, I will use it as well. Again, thanks for your help sir d123...
If someone crosses the laser beam, it will trigger the alarm and I want it to trigger a 555 monostable timer that resets itself after a time duration (or reset it manually using reset button).
Could you give me a circuit diagram for that? and list of parts that I need to use.
Sir, what I want for my project is, if someone crosses the light beam, it will alarm constantly but stops in alarming until someone hit the reset button OR if there's no one could hit the reset button it will automatically stops after 2 minutes of alarming. But I don't know how to create a...
Thanks for your replies.
I just wanted to build a laser security alarm that buzzer turn off in a certain of time when no one can hit manual reset. My real problem is, I can not create a diagram like that. Would you help me to create a diagram for that so I can start building my own project...
Thanks for your response sir, btw here's the diagram using ic 555 for
laser alarm with timer
And here's the diagram using ic 4017 for
**broken link removed**
I hope will help me. TIA.
What I meant was laser security alarm, I saw some circuit that used ic 555 for timer and some circuit used ic 4071 for reset. What I want to ask is, is it possible to combine two ic (555 and 4017) in a circuit to have the laser security alarm a timer and reset.
Hi, I'm a newbie and I'm not an electrical engineer but I can read the circuit diagram. I saw some circuit diagram of laser alarm with timer and laser alarm with reset, but there's no diagram of it with the combination of timer and reset, would you help me to create a diagram with that...
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.
