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Tomzn Adjustable Voltage & Current Protector
The Tomzn Adjustable Voltage & Current Protector offers smart, real-time protection from overvoltage, undervoltage, and overcurrent for home and industrial use.
The Tomzn Adjustable Voltage & Current Protector is a smart electronic protection device designed to safeguard electrical equipment from voltage fluctuations, overcurrent, and short-circuit conditions. Built for reliability and precision, it automatically disconnects the power supply when voltage or current exceeds preset limits, preventing damage to connected appliances or systems.
Featuring adjustable upper and lower voltage thresholds and customizable current limits, the Tomzn protector ensures stable and safe operation of sensitive devices. The digital display provides real-time voltage, current, and status information, while the automatic reset function restores power once parameters return to normal.
This device is ideal for homes, offices, and industrial applications, offering comprehensive power protection for air conditioners, refrigerators, pumps, motors, and other valuable equipment.
Key Features:
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Adjustable voltage and current limits for customized protection
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Automatic power cutoff and reset during abnormal conditions
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Real-time digital display of voltage and current values
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LED indicators for operational status and fault alerts
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Compact DIN-rail mount design for easy installation
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Supports single-phase AC systems (typically 220V)
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Protects against overvoltage, undervoltage, and overcurrent

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- Shield type: Arduino Nano
- Firmware: GRBL
- Modular stepper motor drivers: 3
- Limit switches: 6
- Micro-stepping: 1/16
- Coolant enable
- Uses removable Pololu A4988 compatible stepper drivers. (A4988, DRV8825, and others) (Not Included)
- Jumpers to set the Micro-Stepping for the stepper drivers. (Some drivers like the DRV8825 can do up to 1/32 micro-stepping )
- Compact design.
- Runs on 12-36V DC. (At the moment only the Pololu DRV8825 drivers can handle up to 36V so please consider the operation voltage when powering the board.)
- Please note that this is an unassembled kit and needs soldering.
- Latest Arduino CNC Shield Version 3.51
Arduino LilyPad 328 ATmega328P Main Board 16M Compatible with Arduino
- Microcontroller: ATmega168 or ATmega328V
- Operating Voltage: 2.7-5.5 V
- Digital I/O Pins: 14
- PWM Channels: 6
- Analog Input Channels: 6
- DC Current per I/O Pin: 40 mA
- Board will run from 2V to 5V.
- The latest version of the LilyPad supports automatic reset for even easier programming.
- The back side of the LilyPad is now completely flat!

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