Hi I work in a school and we do go in training but it is very basic Electronics. We were given a circuit that was a temperature sensor that could be built 2 ways with an end result of a led lighting up.
The issue is we need to have the last circuit thats highlighted in yellow on the image attached run a fan and not a led when the thermisitor heats up the power goes normally to the led on the circuit we supply 9v into the circuit but the power come out were the led is connected is around 2.3v as any hire would burn out the led we need to have a minimum of 4v if not more come out at this point could any one suggest a few alterations to are project please thanks
The issue is we need to have the last circuit thats highlighted in yellow on the image attached run a fan and not a led when the thermisitor heats up the power goes normally to the led on the circuit we supply 9v into the circuit but the power come out were the led is connected is around 2.3v as any hire would burn out the led we need to have a minimum of 4v if not more come out at this point could any one suggest a few alterations to are project please thanks
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