The utility model belongs to switch technical field especially relates to a switch linkage
extender, including
signal input and control module,
relay drive module and
signal output module,
signal input and control module includes
USB male head,
triode, first resistance and second resistance,
relay drive module includes
relay, freewheeling
diode, fifth resistance and sixth resistance,
USB male head is inserted with the
USB female head of computer host, the high -speed
data transmission difference signal positive terminal of USB male head is connected with first resistance, sixth resistance, the high -speed data reception difference signal positive terminal of USB male head is connected with fifth resistance, first resistance is connected with second resistance, the base of
triode, the collector of
triode is connected with the
anode of freewheeling
diode, the first common end of relay, the negative pole of freewheeling
diode is connected with the first normally open end of relay, fifth resistance, through using the utility model can realize the linkage of the door lamp between the
package and computer host.