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The positive wire going to the switches should come from whatever you're feeding into the LM3914 VHI pin.
Rgnd: 220
SW R Vo
SW1 120 0.65
SW2 270 0.45
SW3 680 0.24
SW4 1200 0.15
SW1/2 83.07 0.73
SW2/3 193.26 0.53
SW3/4 434.04 0.34
You, sir, are a god among men. Thank you!These are some values for parallel resistors that give you 7 outputs from 4 switches if you use combinations of two at a time.
Code:Rgnd: 220 SW R Vo SW1 120 0.65 SW2 270 0.45 SW3 680 0.24 SW4 1200 0.15 SW1/2 83.07 0.73 SW2/3 193.26 0.53 SW3/4 434.04 0.34
The resistors are 120, 270, 680, 1200 ohms (220 RHI to gnd). This should activate outputs 6, 4, 2 and 1 for single switch presses, and outputs 7, 5 and 3 for combination switch presses.
You may have a problem using combinations of buttons because you won't be able to press or release them at exactly the same time, and therefore you will have unwanted outputs when you try.
SyndromeOCZ said:Did your steering wheel buttons already have the resistors attached to them so you are getting different voltage out of each button when pressing it, or did you have to install the resistors onto each button? When I checked my buttons they seemed to have the same voltage no matter which button I pressed. But this is when my battery was weak from 2 days of working on the vehicle, battery is currently charging so I can test at full capacity.