It turns out that hacking together a security keypad is remarkably simple if you know what you’re doing. [Don] needed to add a keypad with an RFID reader on it. He had previously built a USB RFID ...

A few weeks ago, I was working on a small project of mine, and I faced a rather large problem. I had to program nearly five hundred badges in a week. I needed a small programming adapter that would ...

We still have lots of things that have serial interfaces on them, switches, mangement modules, etc. But we're all out of things that have serial ports. Even the servers who's management modules have a ...

The HV509 is a 200V, 16-channel serial to parallel converter. The high voltage outputs and the backplane driver are designed to source and sink ±1.0mA. The high voltage outputs are controlled by a ...

A device that adds a serial port to a computer. It plugs into the USB port and contains one or more serial port sockets. See serial port. THIS DEFINITION IS FOR PERSONAL USE ONLY. All other ...

Since the introduction of the USB protocol, you don't see many serial devices anymore. For that reason, most manufacturers no longer include a serial port on desktop or laptop computers. Therefore, if ...

Jesus Echavarria has created a new design for a Dual USB Serial and I2C Converter he has created and released the schematic of the board making it available to download. The design is based on the on ...

I have a Palm, and I use it with a laptop that has no serial port. Now, I use the IR port to sync the data, but it is giving me all sorts of headaches lately.<br>The craddle I have only has a serial ...

This converter may help if just the serial port on a personal computer is free, whereas the printer needs a parallel (Centronics) port. It converts a serial 2400 baud signal into a parallel signal.