[Diy_efi] Sensor Heater

[bcroe at juno.com]

22 Feb 2003 18:19:29 -0600 bcroe at juno.com writes:
> I think I have figured out a way to reduce the operating 
> voltage required for the DIY-WB, by a volt.  Putting a 
> relay contact (or perhaps P channel MOSFET) across 
> R4, shorting it out after 1minute of operation, should 
> do it.  The 1 minute timer would be reset each time 
> power was removed.  Now need a cool way to do it.
> 
> Bruce Roe

Looking a little more, it might take an IRF5305L mosfet 
and a CD4541BCN timer ($2.53), and a few mis pieces 
to get the job done automatically.  Or maybe just the 
mosfet and an RC.  If there were a lot of difficult cases 
that could use this, a model could be worked up.  

Bruce Roe

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