You do this so that the SpeakJet activates when you first press and then
release the switch. See the note and table after these steps for help in
choosing which check boxes you must select. (The simple route is to
just select all the Goes Low inputs, as shown in Figure 7-19.)- Connect the box to your computer by using a serial port cable to pro-
gram the SpeakJet.
Check over your circuit to make sure that no wires are loose or touch
another wire — which could cause a short — before hooking them up to
your computer.- With the box connected to your computer, simply click the Write Data
to SpeakJet button in the Event Configuration screen of the SpeakJet
program (as shown in Figure 7-19). - After you finish programming the chip, disconnect the box with the
electronics from the computer.
The event number in the SpeakJet software Event Configuration window
doesn’t always match the pin number in the SpeakJet IC — that would be
too easy. Here’s a list of event numbers and corresponding pin numbers.
We wired switches to Pins 2, 4, and 7, so we use Events 6, 4, and 2.Figure 7-19:
The Event
Configur-
ation
screen
of the
PhraseA-
Lator
software
program.
Chapter 7: Murmuring Merlin 161