Hello,
I have a circuit that I need to modify, the operating principles of the modified circuit have to stay at same as original circuit, or as close as possible. Basically I have a heating circuit with 4, 5Ohm 50W resistors as shown in the schematic below. (the original circuit)
The problem is that the source voltage is going to change to 120VAC instead of 28VAC. In the original circuit each resistor generates about 39W of heating power for a total of about 156W.
I can't change the original resistors.
I can add resistors, I have many different type.
I can use a transformer to drop the 120VAC down to the 28VAC. (Trying to avoid this).
Any Ideas will be appreciated.
I have a circuit that I need to modify, the operating principles of the modified circuit have to stay at same as original circuit, or as close as possible. Basically I have a heating circuit with 4, 5Ohm 50W resistors as shown in the schematic below. (the original circuit)
The problem is that the source voltage is going to change to 120VAC instead of 28VAC. In the original circuit each resistor generates about 39W of heating power for a total of about 156W.
I can't change the original resistors.
I can add resistors, I have many different type.
I can use a transformer to drop the 120VAC down to the 28VAC. (Trying to avoid this).
Any Ideas will be appreciated.