Hey ...does anyone remember the famous (infamous???) HC4LED units??? Well, they are back ... at least for a little while
Terry Hitt of Hitt Consulting (the "HC" in "HC4LED") bought them off eBay. They were salvaged from a cable TV set top box. Nobody knew what to do with them and they were sold off by the pound.
The unit has four seven segment LED displays and an SPI chip on board. It requires only a simple SHIFTOUT command with two I/O lines (Data and Clock) and optionally a third line to enable/disable (alternately it can simply be grounded). It became a big hit. Pretty soon there was code for Parallax BS1, BS2, SXB, and Propeller, Picaxe, various PICs (ASM and BAS), AVRs, Arduino, etc.
In fact, the most sophisticated library/driver object that has been written for the HC4LED units is for the Arduino. It can even do long ASCII string left scrolling text. Just search the Playground.
Sparkfun got ahold of some and they began selling them as well is Hitt Consulting. And then the well ran dry. If you look about the net you will find any number of HC4LED web pages pointing to the "no longer in stock" webpage at Sparkfun as well as the no longer registered www.hc4led.com
some of them loudly lamenting the absence of this neat little unit. Well ... lament no more! Terry found a carton with a little over 250 more of these units. We made a deal and they are now for sale here, while they last. http://www.wulfden.org/TheShoppe/HC4LED/index.shtml
I want to spread them around, so no bulk sales. For now I will sell up to four units per order. The webpage has a link to the newly updated docs and to an open file download directory for every piece of HC4LED code I could get my hands on (BS1/PROP1, BS2, SXB, Propeller, PIC asm and basic, Picaxe, Arduino, etc
I started with 251 units and there are about 180 left available.
cheers ... brian riley, n1bq, underhill center, vermont
The Shoppe at Wulfdenhttp://www.wulfden.org/TheShoppe/