I am just beginning to build simple circuits.
I am building a solar charged - battery operated - LED Array pathway light.
I plan on using a NPN power transistor to act as a switch to close the charging circuit to the battery.
When the cell begins to generate a voltage it will forward bias the gate and allow current to flow to the battery from the solar array. I have that taken care of.
The problem I face is I need a normally closed electronic device that uses little or no parasitic power to turn the LED array off when the solar cell begins to generate a voltage. I do not want to use a photonic device. I want to use a signal voltage from the solar cell to turn OFF the power to the LED array.
Again: When there is no signal voltage the device allows current to flow.
When there is a signal voltage the device quits conducting.
Is there such a device?
Any information you would be willing to share with me would be greatly appreciated.
Thanks
Gavilan
I am building a solar charged - battery operated - LED Array pathway light.
I plan on using a NPN power transistor to act as a switch to close the charging circuit to the battery.
When the cell begins to generate a voltage it will forward bias the gate and allow current to flow to the battery from the solar array. I have that taken care of.
The problem I face is I need a normally closed electronic device that uses little or no parasitic power to turn the LED array off when the solar cell begins to generate a voltage. I do not want to use a photonic device. I want to use a signal voltage from the solar cell to turn OFF the power to the LED array.
Again: When there is no signal voltage the device allows current to flow.
When there is a signal voltage the device quits conducting.
Is there such a device?
Any information you would be willing to share with me would be greatly appreciated.
Thanks
Gavilan