ITEM NAME:four-channel Relay Shield 5V 4-channel 4CH relay module screen for Arduino A4B9 four-channel Relay Shield 5V 4-channel 4CH relay module screen for Arduino A4B9 Standard and shape Arduino Shield interfaces continue to stack other Arduino expansion boards 3 M3 screw positioning holes for easy installation High units (5V or 3.3V) closing of the normally open contact Onboard indicator lss (red) Blue color materials: CCL dimensions: 7.6 x 1.3 x 0.5 cm Relay Shield (ie 5V Quad lss module) is a small current power signal control equipment commonly used electronic module, which allows single-chip high-power control devices are widely used in the SCM system to make project smart home; and the use of various types of motherboards can be inserted directly into the Arduino, eliminating patch cable problems. Special Note: When using the Arduino UN board connected to it, perches the UNO USB interface is extremely high, should avoid green terminals are shorting its shell. Package Included:1 x four-channel Relay Shield Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm..Standard and shape Arduino Shield interfaces. continue to stack other Arduino expansion boards.
