s_cihan_tek
Full Member level 2
Hi all,
I'm trying to obtain the I-V characteristic of a 55W solar panel for different temperature values. Since taking measurements manually would take too much time, i decided to build a simple DAQ circuit that will take the measurements automatically and save them to a EEPROM.
When the corresponding button is pressed, the circuit should start changing the load of the solar panel from full load to short circuit in small steps and measure&save the output I,V and Temperature values to the EEPROM for each value of the load.
My question is, how can i make a high power variable resistor whose value can be controlled by a circuit?
I'm trying to obtain the I-V characteristic of a 55W solar panel for different temperature values. Since taking measurements manually would take too much time, i decided to build a simple DAQ circuit that will take the measurements automatically and save them to a EEPROM.
When the corresponding button is pressed, the circuit should start changing the load of the solar panel from full load to short circuit in small steps and measure&save the output I,V and Temperature values to the EEPROM for each value of the load.
My question is, how can i make a high power variable resistor whose value can be controlled by a circuit?