minelab voltage regulator

[Anonymous]

i have a minelab sd 2100 and i want to increase the input voltage from 6 volt to 7.8...they are finding that these detectors run smoother and go deeper at this voltage...can anyone tell me how to build an adjustable voltage regulator for it...my input voltage will be around 8.4 volts...i need a reliable adjustable regulator that will keep it around 7.8 volts...also can anyone tell me how to build an audio amp for a detector...these minelab detectors dont sound off very loud...thank you

 

[Anonymous]

On the audio amp question it may be possible to
mod the speaker / headphone amp circuit in the
mainboard to make it adjustable and at the same time increase the gain/volume but I don't know what chip they use and have no Minelab, you could create a simple circuit board to boost the volume and can
do a search on the web for (simple audio amplifier)
probably several DIY designs usually a couple caps,
resistors and a chip.
The voltage regulator is a different story, you are saying it is for the input? 8.4 to 7.8 but the input to what?? The main board probably has an onboard
switching 5V regulator normal for the IC components
and will regulate anything input to it at 5V,
so I am not sure what you ar trying to gain.
The MC34063 is a great switching regulator and will regulate at any voltage depending on the setup of
components and it can handle over an 1 amp of current
which is another factor you need to consider in this question as to how much current you need.
I hope this helps a little.
HH <img src="/metal/html/biggrin.gif" border=0 width=15 height=15 alt="">

 

[Anonymous]

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