Microchip’s new 23K256 is a serially interfaced 32 kilobyte SRAM memory chip, available in 8 pin DIP and 8 pin SO packages. SRAM, like EEPROM, is a data storage medium. Data stored in SRAM is lost without constant power, but it’s really fast and there’s no limits to the number of write cycles. EERPOM stores data even without power, but it’s slow and usually limited to around a million write cycles.
32K SRAM chips typically have 15 address lines and 8 data lines, like the IS61LV256AL we used on our CPLD development board. The 23K256 requires just four signal lines, but sacrifices the speed of a parallel memory interface. It’s a great way to add extra memory to a low-pin count microcontroller without routing 23 signal traces. We’ll show you how to interface this chip below.
[Kiethrobot] built this six legged little helicopter. You can see that it is fairly mobile. You can also see that it doesn’t really make it off the ground really well. He must have gotten more power out of it though because he destroyed it in a crash the day after filming this. It is surprising how much character those six little legs add to the RC helicopter. This thing is almost as cute as something from crabfu.
a true hacker knows that you just can’t blow away the competition with a stock piece of equipment. Nerf warfare is no different. These guys did what they had to do to become the dominant force in their offices Nerf wars. They built their own high power Nerf rifle. Using some PVC, a sprinkler valve, and a bicycle pump, they made a Nerf gun that can fire roughly 300 feet. You can see a video of it in action after the break.
In order to update Skate or Die to a newer experience, [Jeff] has hacked together a skateboard controller for his Commodore 128. He’s using a parallax propeller to interface the skateboard to the unit, and another controller to boot up the game. Watch out Wii.
