[Nick Touran] wanted to make two Raspberry Pi’s communicate wirelessly. There are lots of options, but [Nick] used a LASER and a photoresistor, along with Morse code. If you don’t find Morse code fancy enough, you could always refer to it as OOK (on/off keying). The circuit uses a common LASER module and an ordinary photoresistor that varies in resistance based on light. A resistor forms a voltage divider with the photoresistor and an external A/D reads the resulting voltage.
The circuit works, but we couldn’t help but notice a few items. Not all photoresistors are as sensitive to the same light wavelengths, so for the maximum range you’d want to pick a particular photoresistor. While the analog to digital converter is certainly workable, we couldn’t help but wonder if you couldn’t set up the divider to use the inherent threshold of the Raspberry Pi’s input pins for a simpler circuit. Of course, if you used the same technique with an Arduino, you could use the built-in A/D converter, and the A/D converter is probably easier to get working.https://hackaday.com/2015/12/12/rasp...ion-via-laser/
Welcome to the DCEmu Homebrew and Gaming Network. This Network of sites is owned and ran by fans of the retro consoles and the latest next-gen consoles, we post news on all the consoles we cover about hardware aspects, gaming, modification, Hacking and Homebrew. Homebrew and Emulation are software thats made using free and legal tools to play on games consoles. This Network is the only worldwide network of sites where coders can upload and post news of their own releases and get the credit and comments they deserve for all their hardwork. We have a Network that currently supports PSvita, Nintendo 3DS, WiiU, PS4, Xbox720, Nintendo Wii, Xbox360,Pandora, Dingoo, Wiz, PS3, PS2, Xbox, Gamecube, Nintendo DS, PSP, GBA, Dreamcast, Sega Saturn, Android, Apple, Blackberry, GP32, GP2X, Nintendo 64, Snes, Gameboy, Nes, Virtual Boy, Apple iPhone, Ipad, Ipod Touch, Ipod, Windows Phone and also Mobile Phone Emulation. When new consoles appear we will expand to cover those consoles.
Please help DCEmu become stronger by posting on the forums every day and make our community larger.