I was searching for the most practical circuit that would work on my Honda Civic car to activate a relay/light/switch at a preset (adjustable by calibration) rpm. I found this circuit among others and hooked it up to my car.
https://web.archive.org/web/20020605035113/http://www.hondacrx.org/shift.htm
The multiturn potentiometers were working perfectly and i could adjust each one to turn on the each LED at their own preset rpm. However, i encountered issues when th engine was at idling and up to 1500 rpm. I have set the lights to work at 5,000rpm and 6000rpm respectively but when the engine is at idle speed up to 1500 rpm, both lights were flickering on and off quite quickly.
The engine is using an OBD 2 ecu (Honda P2J-003 computer box). When i tried this same circuit on a newer model honda (2009 Honda FIT engine), the circuit works perfectly without the flickering.
How do i go about fixing the circuit? do i have to add some sort of filter to make the input signal cleaner? what components do i need to add or change? I am only using a bench multitester (Volt-Ohm-Amp) for all of my projects.
https://web.archive.org/web/20020605035113/http://www.hondacrx.org/shift.htm
The multiturn potentiometers were working perfectly and i could adjust each one to turn on the each LED at their own preset rpm. However, i encountered issues when th engine was at idling and up to 1500 rpm. I have set the lights to work at 5,000rpm and 6000rpm respectively but when the engine is at idle speed up to 1500 rpm, both lights were flickering on and off quite quickly.
The engine is using an OBD 2 ecu (Honda P2J-003 computer box). When i tried this same circuit on a newer model honda (2009 Honda FIT engine), the circuit works perfectly without the flickering.
How do i go about fixing the circuit? do i have to add some sort of filter to make the input signal cleaner? what components do i need to add or change? I am only using a bench multitester (Volt-Ohm-Amp) for all of my projects.
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