I picked up this really interesting but cheap-looking lamp from the thrift store the other day, and basically it's 24 LEDs (8 each, R,G,B) connected to two M74HC595B1 8 bit shift registers and two ULN2003AG Darlington arrays. However, there's one 18 pin DIP chip in the heart of the circuit with no markings whatsoever. The board itself is white and hard to track much of anything on, but I can see a 12mhz crystal with three small ("30") ceramic caps, one bigger electrolytic (100uf), and a three-terminal LM7805 positive voltage regulator.
Any idea what this could be? I'm a complete newb (with persistence!) and have guessed it to perhaps be a PIC of some sort, like maybe a PIC16F88 or the sort? I don't have a lot of things to test it out with, but I DO have a lot of chips. Only thing that matches up just on a "hey, this has 18 pins too!" kind of way and after some Googling is the PIC16F88.
Thoughts? Thanks in advance for any and all help.
Cheers.
Any idea what this could be? I'm a complete newb (with persistence!) and have guessed it to perhaps be a PIC of some sort, like maybe a PIC16F88 or the sort? I don't have a lot of things to test it out with, but I DO have a lot of chips. Only thing that matches up just on a "hey, this has 18 pins too!" kind of way and after some Googling is the PIC16F88.
Thoughts? Thanks in advance for any and all help.
Cheers.