Monitor 15 contacts with one PIC input

Monitor 15 contacts with one PIC input

Several previously published Design Ideas and appnotes [1-4] show how to use many pushbuttons with a minimum number of inputs. They require an RC circuit where the timing can be measured to identify which pushbutton has been pressed, or an ADC input, with resistors forming a divider for each pushbutton pressed. The following Design Idea […]

Monitor 15 contacts with one PIC input Continue Reading