wheres the fun in buying a controller card when one can spend hours building somthing he can burn up in two sec.i find it more fun to build what i need ,i learn more when i do this.
will build program that sends data to serial port that will turn on/off relays i use visual basic for programs need help w/software developement for atmel chips
could use printer port ,but want to use serial port 4-wires need to go 25' to 50'(pc to atmel board).want to drive relays to controll 110v relay for light show.
i want to us a AT90S2313 to drive 8 relays on /off , will use pc's serial port to send data to atmel need a schematic an code for atmel . max232 will be between atmel and pc.thanks