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  1. irishluck

    Building a time delay relay circuit with 555 timer

    Here's what I'm trying to do. I made a laser fence project and I'm trying to improve the design. Currently I use an Arduino chip with a photocell shield. Basically when the laser is broke from the photocell, the arduino chip trips a relay on for about 25 seconds. Im using a 12v input and I...
  2. irishluck

    Building a time delay relay circuit with 555 timer

    So im looking at building a 555 time delay circuit. (Diagram of circuit will be attached below.) Im trying to make sure that this will be what I need but I want to make sure that this would have a 12v output? Im needing the output to be connected to a small relay that will trip when activated...
  3. irishluck

    Need a little help on circuit for 120VAC to 12VDC

    So just so I understand, if the transformer converts 110 to 14v or whatever you choose, whats the point of all the other components on a power supply?
  4. irishluck

    Need a little help on circuit for 120VAC to 12VDC

    So the instructable that @Harald Kapp pointed out is a 120v to a 12v? I just looked at the first page and it just says a 12v power supply
  5. irishluck

    Need a little help on circuit for 120VAC to 12VDC

    lol I wouldn't worry about that heatsink. The laser doesn't put off ANY heat at all. I just got those heat sinks for $1 each so they were cheap and easily available ha. Now my 3w handheld laser, yea it puts off a bit of heat. Burns a hole through my shirt ;) This project isnt a fence to burn...
  6. irishluck

    Need a little help on circuit for 120VAC to 12VDC

    Id use a PC power supply except it has to fit in a 6x6" tube. Ill check out the instructable though.
  7. irishluck

    Need a little help on circuit for 120VAC to 12VDC

    Hevans1944 how many od those NST do you have? Im going to be building another one soon, might need to pick up another one =D Anyways, lets see if I can anwser some of those questions for you. Here is a link to the exact converter I purchased...
  8. irishluck

    Need a little help on circuit for 120VAC to 12VDC

    I will get back on here after school and see if I can answer your questions. Im out in about an hour.
  9. irishluck

    Need a little help on circuit for 120VAC to 12VDC

    So think anyone can help me with a schematic?
  10. irishluck

    Need a little help on circuit for 120VAC to 12VDC

    Yea ha. I can make things if I have a schematic and what not. When it comes to really explaining things or understanding how it all works and so forth? Well that's why I'm in school, to learn in. We'll be building a variable power supply in about 6 months. So ill learn then! But unfortunately...
  11. irishluck

    Need a little help on circuit for 120VAC to 12VDC

    Powering the laser diode isnt the issue. I know how to power them and ive been building them for a couple years now ;) I have a specially built driver I have someone make for me to power the laser itself. How about I just better explain what Im building and give a little more background about...
  12. irishluck

    Need a little help on circuit for 120VAC to 12VDC

    Havans1984: We are actually learning the Ohms law and Kirchoff's Laws at the moment. Just took out test on that and leaning how to calculate the Amps, ohms, voltage, watts and power. We are learning about series circuits right now and we are about to start on parallel.
  13. irishluck

    Need a little help on circuit for 120VAC to 12VDC

    5A is the most i will need. I don't think I will need that much but its just to be safe. !2v is kinda what I need to keep it regulated at. Its going to power a laser diode so I don't need spikes. I'm looking to build this for a project right now but would like to learn and be able to build my...
  14. irishluck

    Need a little help on circuit for 120VAC to 12VDC

    What do you mean by regulation? I'm still learning a lot about electronics right now. I'm in school here at PCI in kcmo to get my associates in electronics technology. Unfortunately we haven't gotten to a lot of stuff yet. Just started our AC portion of school. Alot to learn! The circuit just...
  15. irishluck

    Need a little help on circuit for 120VAC to 12VDC

    Hi guys, I just need a little help here. I need to find a schematic for a circuit on 120VAC to 12VDC converter I don't need a lot of amps. I think at most would be 5A. But I just need to get a schematic with the proper parts to build this. Any help would be great!
  16. irishluck

    Guidance for making photocell and 12v relay on timer

    What kind of switches are on that circuit? I basically have to have a photocell in this. Where would I put that on the board. It will be a high power laser. So the 100k trimpot is what will tell the relay how long to stay tripped for? Is says this one can only do like 12 seconds. What...
  17. irishluck

    Guidance for making photocell and 12v relay on timer

    So I've been trying to do my own research on this.But just confusing myself. I figured this would be simple enough to do so maybe someone on here can point me in right direction and help me. Basically I'm helping out a school with a project. Main reason I'm doing it is because I'm a a laser...
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