lbenson
Senior Member
Breadboard images for slave 40x2 and MCP23017
Attached are two breadboard images from westaust55's excellent pebble program. The first shows 2 40X2s in master/slave configuration, the second is one I had previously drawn up for a 40X2 and 2 MCP23017s.
Note that the breadboards are in places more suggestive than definitive. The LEDs with no resistors come with built-in resistors, Digikey 67-1103-ND. For the LEDs which are shown with resistors, the resistors are in-line with the LEDs, not plugged into the breadboard column as shown. The SIL 10K pulldowns are something you might not have in your parts box--they are for preventing false triggering of the inputs due to noise.
The master/slave setup shows as examples one input port on the slave (portB), and one output port on the master (also portB).
Attached are two breadboard images from westaust55's excellent pebble program. The first shows 2 40X2s in master/slave configuration, the second is one I had previously drawn up for a 40X2 and 2 MCP23017s.
Note that the breadboards are in places more suggestive than definitive. The LEDs with no resistors come with built-in resistors, Digikey 67-1103-ND. For the LEDs which are shown with resistors, the resistors are in-line with the LEDs, not plugged into the breadboard column as shown. The SIL 10K pulldowns are something you might not have in your parts box--they are for preventing false triggering of the inputs due to noise.
The master/slave setup shows as examples one input port on the slave (portB), and one output port on the master (also portB).
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