this ir link that you created, grant, you said that it works with the i2c prot, right? for that to happen, should all of the slave calcs have the diodes pointing to the master calc's link? like this: S S S \ | / \ | / \ | / \ | / \|/ M S -> Slave M-> Master FUZZ I Don't See Why Not ------------------- listen.to/yankovic ICQ: 3512251