Description:
HX711 is a precision 24-bit analogto-digital converter (ADC) designed for weigh scales and industrial control applications to interface directly with a bridge sensor. The input multiplexer selects either Channel A or B differential input to the low-noise programmable gain amplifier (PGA). Channel A can be programmed with a gain of 128 or 64, corresponding to a full-scale differential input voltage of ±20mV or ±40mV respectively, when
a 5V supply is connected to AVDD analog power supply pin. Channel B has a fixed gain of 32. An on-chip power supply regulator eliminates the need
for an external supply regulator to provide analog power for the ADC and the sensor. The clock input is flexible. It can be from an external clock source, a crystal, or the on-chip oscillator that does not require any external component. On-chip power-on-reset circuitry simplifies digital interface
initialization. There is no programming needed for the internal registers. All controls to the HX711 are through the pins.
Detection Method:
Preliminary quick judgment: disconnect all modules of the module, only supply the module 5v (that is VCC +5v, gnd ground), then short the module's CK port to ground, and then measure out + ground voltage, should 4.5v or so, then measure the DO/RX port to the ground voltage, it should be about 0v if the voltage is consistent, the module is 99% normal.
Complete test judgment: use the test circuit diagram provided by the shop to build a circuit, give the 89c51 single-chip computer into the hex test program provided by the store, then connect the computer with a serial cable, run the serial port assistant on the computer, you can receive the test circuit. The reading is reported and the reading is normal, indicating that the module is normal. See the test chart below for details.
Application:
robotics
load cell
Features:
With metal shielding, strong anti-interference, reserved CPU (STC15F104) position, you can upgrade the secondary development.
Two selectable differential inputs
On-chip low-noise programmable amplifier with selectable gains of 32, 64, and 128
On-chip voltage regulator circuit provides power directly to external sensors and on-chip A/D converters
On-chip clock The oscillator does not need any external devices, and an external crystal or clock can be used if necessary.
Power-on automatic reset circuit
Simple digital control and serial communication: All controls are input by pins, and the on-chip registers do not need to be programmed.
10Hz or 80Hz can be selected. Output data rate
Synchronously suppress power disturbances of 50Hz and 60Hz
Power consumption (including regulated power supply circuit):
Typical operating current:
Operating voltage range: 2.6 ~ 5.5V
Operating temperature range: -20 ~ +85 °C