what is dpdt?
->o __ o-> 2. SPDT (single pole double throw) It switches one line to 2 different ways (3 pins). ->o __ o-> o-> 3. DPST (double pole single throw) It means two independent SPST in one switch (4 pins). ->o __ o-> ->o __ o-> 4. DPDT (double pole double throw) It means two independent SPDT in one switch.