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112 Posts
This has been driving me nuts! I can't change from ABBA to Cher (!) after I've switched the ignition off, and I can't use the MF buttons to control this fantastic BT phone set up without the ignition being on. Grr! I don't want to connect the internal wheel electronics and possibly the MFSW controller to 'always on' power for obvious reasons. Is this troubling others, or have I gone and overlooked something simple?
I do have a solution in mind, which would give a power source that becomes available once the key is inserted and turned to 'Ignition on' and which then stays available after the ignition is switched off until the key is removed, when the power supply is cut off. I have two alternative ways of doing this, with relay logic and with a standard 4019B CMOS chip driving a single output relay via a relay driver. I'll be constructing the relay version shortly. Any interest out there? (it's ok Lee, I'm not writing a paper on it ....)
I do have a solution in mind, which would give a power source that becomes available once the key is inserted and turned to 'Ignition on' and which then stays available after the ignition is switched off until the key is removed, when the power supply is cut off. I have two alternative ways of doing this, with relay logic and with a standard 4019B CMOS chip driving a single output relay via a relay driver. I'll be constructing the relay version shortly. Any interest out there? (it's ok Lee, I'm not writing a paper on it ....)