CamB Posted September 17, 2016 Report Share Posted September 17, 2016 I've had my Storm set up (but not used in anger) with a 6 position rotary switch set up with resistors (ie a voltage divider). There's another post somewhere with what I did. The purpose was to use it to switch between boost levels and also using a virtual auxiliary to switch other stuff in various positions (eg different fuel and ignition maps for first 3 positions vs last 3 positions. It seemed to work well on my workbench.Being a G4 storm, I am short of inputs. I have TPS, wideband, oil pressure and want to add fuel pressure, so have been trying to think of a way to get the same rotary switch functionality into a DI. I've ended up going frugal by buying one of these (for US$0.99 delivered, different seller) on Ebay:http://www.ebay.com/itm/NE555-Pulse-Frequency-Duty-Cycle-Adjustable-Module-Square-Wave-Signal-Generator-/271251079422I have replaced the potentiometer that controls frequency with my rotary switch (which is similar in overall resistance to the potentiometer) and now can have a frequency output in 6 steps of 17hz to 30hz. I have powered the unit with the Storm's +5v and its a DI set as "Speed" with a sensible divider. It seems to work ... at least on my workbench. Basically my question is whether this unconventional approach has pitfalls. My concerns are:- it only cost 99c- I needed to use the +5v because without a regulated supply the frequency was changing (on +12v battery voltage)- the unknown - basically is there any reason to think this wouldn't be a reliable way of doing this. My electronic knowledge is pretty limited...Random supplementary question - I have configured an auxiliary output for a warning light by selecting SW Cond = Engine Limits and "1" for the engine limit. I am hoping this means the light will come on if any of the Limits are triggered. Can anyone confirm? Quote Link to comment Share on other sites More sharing options...
Scott Posted September 19, 2016 Report Share Posted September 19, 2016 Hi Cam,We think this should work. One thing to consider is what happens if the device fails. I'm expecting that it will then output 0 Hz, and so it may be worth adding a row on your able for this, or verify that the lowest (17 Hz?) line is used.Scott. Quote Link to comment Share on other sites More sharing options...
CamB Posted September 19, 2016 Author Report Share Posted September 19, 2016 Thanks for getting back to me. That's a good idea to consider what if it fails (and I should check, but hopefully it is a zero and not super high frequency) - at the moment if it went below the lowest row it would presumably stay there.That'd be OK as I think I am always planning on having the lowest row as the most conservative setting (for now I'm actually planning position 1 as a sort of limp mode, for crap fuel or some other mechanical issue, so low boost, slightly lower timing, etc) Quote Link to comment Share on other sites More sharing options...
CamB Posted September 19, 2016 Author Report Share Posted September 19, 2016 Sorry - also the supplementary question:Random supplementary question - I have configured an auxiliary output for a warning light by selecting SW Cond = Engine Limits and "1" for the engine limit. I am hoping this means the light will come on if any of the Limits are triggered. Can anyone confirm?Thanks! Quote Link to comment Share on other sites More sharing options...
CamB Posted September 19, 2016 Author Report Share Posted September 19, 2016 Random supplementary question - I have configured an auxiliary output for a warning light by selecting SW Cond = Engine Limits and "1" for the engine limit. I am hoping this means the light will come on if any of the Limits are triggered. Can anyone confirm?Never mind - I looked in the G4+ help file and found the following which confirms what I hoped:Engine Limits - True when RPM Limit, MAP Limit, Speed Limit, GP RPM Limit 1 or GP RPM Limit 2 are active.The value of Engine Limits has no effect. Scott 1 Quote Link to comment Share on other sites More sharing options...
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