Description
Reviews
| Brand | - |
| Category | Electronic Components / Maker DIY / Development Boards & Control Boards |
| Origin | - |
| Microcontroller Model | STC89C52RC (8051 Core) |
| Voltage Input Range | 0V to 30V DC |
| Communication Interface | UART / Bluetooth HC-05 Module |
| Display Type | 1602 LCD Screen with Backlight |
| Power Supply | 5V via USB or 9V Battery Clip |
| PCB Dimensions | 85mm x 55mm x 15mm |
| ADC Resolution | 10-bit Successive Approximation |
| Measurement Channels | 4 Independent Analog Channels |
| Programming Port | ISP Download Header (5-pin) |
| Package Material | FR-4 PCB and ABS Plastic Case |
Anonymous
Mar 18, 2026
Rating: 5/5
Great Learning Tool
This kit is perfect for understanding how digital voltmeters work. The schematic is clear and the Bluetooth feature adds a modern touch.
Anonymous
Mar 07, 2026
Rating: 4/5
Solid hardware quality
PCB traces are well done. Instructions could be more detailed regarding the code upload process, but overall a good purchase.
Anonymous
Feb 04, 2026
Rating: 5/5
Perfect for students
Bought this for my electronics club. The multi-channel support allows us to measure multiple points in a circuit simultaneously.
Anonymous
Jan 31, 2026
Rating: 5/5
Bluetooth works well
Connected to my phone immediately using a generic UART app. Very convenient to log data wirelessly during experiments.
Anonymous
Jan 25, 2026
Rating: 4/5
Good but tricky calibration
Hardware quality is solid. Calibration required some patience using the potentiometer, but once set, readings are accurate.
Q: What Bluetooth app do you recommend?
A: Any generic Serial Bluetooth Terminal app available on iOS or Android stores will work with the HC-05 module.
Q: Can it measure AC voltage?
A: No, this design is specifically calibrated for DC voltage measurement only. Measuring AC may damage the board.
Q: What is the maximum current this board can handle?
A: This is a voltage measurement device with high input impedance. It is not designed to measure or pass significant current.
Q: Is soldering required for assembly?
A: Yes, this is a DIY kit. You will need a soldering iron and basic tools to assemble the components onto the PCB.
Q: Does this kit come with the source code?
A: Yes, a QR code is provided in the manual to download the C language source code and schematic diagrams.
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