DTMF Logger
2003-12-11 00:35 by Ian
The DTMF logger uses an MT8870 DTMF decoder chip to listen to a POTS line and store any digits it hears in a 24C256 I2C EEPROM.
Comment [2]
ColdFire Test Code (LCD/HDD)
2003-04-07 21:51 by Ian
Some ColdFire code to read DriveID information from a hard drive, parse it, and display it on an LCD. All hardware was memory-mapped.
The hammer tester
2002-09-23 23:56 by Ian
My first experience working as an independent contract engineer was for my dad at age 19.
A capacitance meter built from discrete ICs
2000-04-11 23:58 by Ian
Not much to say about this one. It was a project that I saw in an issue of Popular Electronics before it became Poptronics. It is a capacitance meter built from discrete ICs. It creates an RC oscillator and counts the number of wave-fronts over a given period of time to arrive at a value for the unknown capacitance.
AT Keyboard Interface
1999-06-17 02:36 by Ian
My first HC11 project when I was 16. This device plugs into an AT keyboard and converts the scancodes to ASCII, sending them over an RS-232 port at 9600bps.