Design a Low-Cost DC Voltage Detection Circuit and PCB in EasyEDA — 120V to 1000V DC

Design a Low-Cost DC Voltage Detection Circuit and PCB in EasyEDA — 120V to 1000V DC

**Description:**
I need an electronics freelancer to design a simple, functional, low-cost, and protected circuit capable of detecting **DC voltage from 120V to 1000V DC**.

When the circuit detects voltage within this range, it must activate a **relay output**. The relay contact will be used to switch or control an external circuit/load of up to **1000V DC and 100mA**.

The project must be designed in **EasyEDA**, including both the **schematic circuit** and the **PCB layout**.

The circuit should also include a **LED indicator**, if possible, to show when voltage is detected or when the relay is activated.

**Main requirements:**

* Design the schematic in **EasyEDA**
* Design the PCB layout in **EasyEDA**
* Detect DC voltage from **120V to 1000V**
* Activate a relay when voltage is detected
* Relay contact or output protection rated for up to **1000V DC / 100mA**
* Low-cost and simple design
* Protection against overvoltage, electrical noise, and reverse polarity if possible
* Electrical isolation between the high-voltage input and the low-voltage control side
* LED status indicator
* Use common and easy-to-find components
* Provide BOM/component list
* Provide Gerber files for PCB manufacturing
* Provide a basic explanation of how the circuit works

This circuit will be used in a high-voltage DC application, so **safety, isolation, PCB clearance, creepage distance, and protection are very important**.