Keyestudio ARDUINO maker learning kit, Manual

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141
b. Voltage control is the control circuit. It can be AC or DC voltage according to different
models.
c. DC resistance: refers to the DC resistance of relay coil, multimeter.
d. Attract current: refers to the minimum current that the relay needs to generate suction action.
During normal use, given current must be slightly larger than the operating current to
guarantee stable operation of relay. Normally, the working voltage is 1.5 times of the coil’s. It
cannot be more than the rated working voltage or coil will be burnt out due to high current.
e. Release current: Refers to the maximum current for the relay to gennerate release
action. When the suction-state current reduces to a certain point, relay will return to its
unenergized release state. The current here is far less than the suction current.
f. Contact switch voltage and current: refers to the load voltage and current the relay allows.
This determines the magnitude of control voltage and current. Use current no high than these
values or relay contact will be damaged.
Hardware required
Uno board *1
Red M5 LED *1
220Ω resistor *1
8050 NPN dynatron
*1
4007 diode
*1
5V relay *1
Breadboard *1
USB cable *1
Jumper wires
Schematic diagram