Fresh hacks every day
I finally set aside some time for one of my own projects. I have been playing around with ARM microcontrollers a lot lately and wanted to try out my GLCD display that uses the KS0108 protocol. It’s 5V but I had heard that some of these displays will work with 3.3V TTL. But the datasheet tells me otherwise. I tried … Read the rest
The rig pictured above works as an Internet connected temperature sensor which sends [Zaion] an email with a graph of the change over time. This in itself is interesting, but one part in particular caught our eye. He’s using an i2c temperature sensor , and we think the PCA9517 Level-Translating I2C Bus Repeater that makes it possible is a perfect … Read the rest
[Giorgio Vazzana] turned his Raspberry Pi into a PIC programmer using a rather small collection of common parts. It supports about a dozen different chips from the 16F family. But we’d guess that software is the limiting factor when it comes to supporting more chips.
Generally the problem with PIC programming is the need for a 12V supply. He chose … Read the rest
This is a Nokia 6300 screen. It’s a 320×240 display that has about 2″ of diagonal viewing area and boasts 24-bit QVGA TFT technology. It’s going to look fantastic in your next project and it won’t be hard to get up and running thanks to the hardware and software guide which [Andy Brown] put together. He chose this display because … Read the rest
[Andy Brown] wanted one level converter to rule them all, so he set out to build his own which included plenty of options.
The chip at the top and center is a pretty neat little device. It’s an NXP 74ALVC164245DL. In addition to having an incredibly long and seemingly meaningless part number, it contains a pair of bi-directional octal … Read the rest
You’ve got several devices which communicate via the I2C protocol, but some of them can only operate at 3.3V while the rest are hungry for a 5V connection. What to do? [Linux-works] built this I2C level converter to solve the problem.
The circuit comes from an NXP app note (PDF) on the issue. You can take a quick peek at … Read the rest
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