can anyone help me with a question regarding laser tripwires? Answered
I need help! I'm absolutely new to DIYs and electronics etc but have always admired what people managed to put together on their own. So far i have only connected a computer fan to USB. I recently purchased a 'motion sensing' electronic guest saluting doorbell. it doesn't have more than a 5 maybe 6 feet range. anyway i wanted to make a laser tripwire with this (so it can also increase the range and work in the dark) so i experimented. A torchlight pointed at the sensor works fine so now i have a 'broken-beam' sensor. Getting fancier, i tried with a little cheap chinese laser, but it fluctuates too much and the sensor won't stop ringing due to the fluctuations in light! anyway, i need something with a steady beam that can keep lit for a few hours at a time - maybe some sort of laser that's plugged into an electric socket or some sort of battery? any ideas on what i can use?