HX711 súlyérzékelő dedikált AD modul erőmérő modul kétcsatornás 24 bites analóg-digitális konverzió pajzsgal
HX711 weighing sensor dedicated AD module force measurement module dual-channel 24-bit analog-to-digital conversion with shieldi
Sampling hx711 24-bit ad chip, dual-channel differential input. Full-chip machine welding, with metal shielding, distribution of straight and bent pins, which can meet various installation and welding methods. The board uses two 47uF capacitors, and the materials are sufficient! Built-in pull-up resistor, and reserved CPU welding position, it is very suitable for their own secondary development of various sensor-related applications.
Main features of the module:
● With metal shield, strong anti-interference, reserved cpu (STC15F104) position, you can upgrade and develop by yourself.
● Two-way selectable differential input
● On-chip low-noise programmable amplifier with selectable gains of 32, 64 and 128
● On-chip voltage regulator circuit can directly provide power to external sensors and on-chip A/D converters
● The on-chip clock oscillator does not require any external devices, and an external crystal or clock can also be used if necessary
● Power on automatic reset circuit
● Simple digital control and serial communication: all controls are input by pins, and the internal registers of the chip do not need to be programmed
● The output data rate of 10Hz or 80Hz can be selected
● Synchronously suppress 50Hz and 60Hz power interference
● Power consumption (including regulated power supply circuit):
Typical working current: <1.7mA, power-off current: <1μA
● Operating voltage range: 2.6 ~ 5.5V
● Operating temperature range: -20 ~ 85℃
●Size: 29mm * 17mm * 4mm
Module detection method:
1. Preliminary quick judgment: disconnect all the connections of the module, and only supply power to the module 5v (that is, vcc is connected to 5v, gnd is grounded), and then the ck port of the module is shorted to ground, and then the out voltage to ground should be measured. About 4.5v, then measure the voltage of the DO/RX port to ground, it should be about 0v, if the voltage is consistent, it means that the module is 99% normal.
2. Complete test judgment: Use the test circuit diagram provided by our shop to build a circuit, burn the 89c51 microcontroller into the hex test program provided by our shop, and then connect the computer with a serial cable, run the serial assistant on the computer, and then you can receive the test circuit sent out The reading report is normal, indicating that the module is normal.
The J1 jumper on the back of the module is the data output rate of the HX711 chip is 80hz/10hz selection. J1 is open, the output rate is 80hz, that is, ad conversion is 80 times per second, J1 is short-circuited, and the output rate is 10hz.
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