Grain of Wheat
hi all,
i using arduino dim on loop 12 volt grain of wheat bulb via transistor
which works fine.
to simplify installation share power supply
bulb , 12 volts arduino rather have 2 separate
supplies, installation ideally run pack of 12volt aa batteries.
is there reason should not share same power supply?
can ii take power lead bulb power arduino vin socket.
many thanks
keef476
i using arduino dim on loop 12 volt grain of wheat bulb via transistor
which works fine.
to simplify installation share power supply
bulb , 12 volts arduino rather have 2 separate
supplies, installation ideally run pack of 12volt aa batteries.
is there reason should not share same power supply?
can ii take power lead bulb power arduino vin socket.
many thanks
keef476
is there reason should not share same power supply?
yes. inefficiency!
if going power batteries, using linear regulator in arduino (which can @ 12v if powering nothing else 5v regulator output) wasting 60% of battery power.
it makes more sense power arduino (and use pro mini instead has no usb ttl converter waste more power) 4.5v - 3 aa batteries.
i do have query why using "grain of wheat" bulb nowadays when these have been functionally replaced - such in model railways - white leds in smd format can powered same 4.5v without switching transistor?
Arduino Forum > Using Arduino > LEDs and Multiplexing > Grain of Wheat
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