Bit-Tree Creativity - Universal AD Analog Acquisition Board

Universal AD Analog Acquisition Board (A046)

BIT-TREE Universal AD Analog Acquisition Board. Powered by 3.3V~5V. It supports signals from photosensitive sensors, thermistors and resistive analog sensors. Equipped with AO analog output and DO digital output. Built-in adjustable threshold potentiometer, suitable for various analog signal acquisition and teaching experiments.

Dual Analog & Digital Output Supports AO analog quantity output and DO digital quantity output at the same time, convenient for signal reading and threshold switching control.

Adjustable Threshold Comes with precision potentiometer, users can freely set trigger threshold according to actual application scenarios.

Wide Voltage Compatibility 3.3V~5V wide operating voltage, compatible with mainstream single-chip microcomputer main controllers.

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Parameter Category	Item	Specification Details
Basic Information	Product Model	A046
Basic Information	Module Name	General‑Purpose AD Analog Acquisition Board (A046)
Basic Information	Core Function	Acquire analog signals from resistive sensors; dual‑channel outputs: analog voltage AO and digital switch DO
Basic Information	PCB Dimension	40.00mm × 24.00mm, equipped with 4 standard mounting holes
Basic Information	Product Weight	Weight with enclosure: 11g; Bare‑board weight: 4g
Basic Information	Applicable Scenarios	Resistive analog sensors such as photosensitive, thermistor, humidity and gas sensors; MCU signal acquisition, threshold alarm detection
Electrical Parameters	Operating Voltage	3.3V~5V DC, compatible with mainstream full‑series MCU systems
Electrical Parameters	Signal Output Type	Continuous analog voltage signal (AO) + TTL digital switch signal (DO)
On‑board Components	Core Chip	U1 Signal‑processing / voltage‑comparator chip
On‑board Components	Adjustment Component	ADJ precision adjustable potentiometer for threshold setting
On‑board Components	Indicator LEDs	PWR power indicator LED, OUT digital trigger status indicator LED
On‑board Components	Auxiliary Components	C1/C2 filter capacitors, R1~R4 current‑limiting and voltage‑dividing resistors
Control Interface CN1 Pin	GND	Power common ground; must share ground with the MCU
Control Interface CN1 Pin	VCC	Positive terminal for module power supply, connect to 3.3V/5V power source
Control Interface CN1 Pin	AO	Analog output; outputs voltage proportional to sensor resistance; connect to MCU ADC pin
Control Interface CN1 Pin	DO	Digital‑switch output; logic level flips when signal exceeds preset threshold; connect to general‑purpose IO / external interrupt
Sensor Interface CN2	SENSOR	Sensor input terminal, directly connect to various resistive analog sensor probes
Adjustment & Indication	ADJ Potentiometer	Rotates to adjust DO trigger threshold; trigger critical point freely adjustable clockwise / counter‑clockwise
Adjustment & Indication	PWR Indicator LED	Always lit when module is powered on, indicates normal power supply
Adjustment & Indication	OUT Indicator LED	Lights up when DO is effectively triggered, visually shows threshold‑alarm status
Packaging Solution	Optional Packaging	① Anti‑static bag soft package ② White card hanging blister box ③ Kraft paper carton

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