Pulse Generator PCB Design for 12V Valve

Project: Compact Pulse Generator Embedded PCB for 12V Solenoid Valve I am looking for an embedded electronics engineer / PCB designer to develop a compact control PCB for a portable pulse generator device used for underground poly pipe locating and plumbing field testing. The PCB will control a 12V DC solenoid valve to generate repeating pressure pulses through plumbing pipelines. PCB Requirements: - Compact rectangular PCB - Target size: 40mm x 40mm - Compact SMD design preferred - Suitable for portable enclosure integration Main Features Required: 1. Rechargeable Battery System - Support rechargeable lithium battery pack - Charging input circuit included 2. LED Indicators - Low battery indicator LED - Charging indicator LED - Full battery indicator LED 3. Power / Pulse Status LED - Second LED for ON/OFF indication - LED should blink during pulse operation 4. Pulse Modes - 3 selectable pulse modes: - Low - Standard - Fast 5. Solenoid Valve Control - 12V DC solenoid valve output - Stable pulse generation - Suitable driver circuit for inductive load 6. Future Expansion Capability Please include standby pads/headers or basic expansion support for future upgrades such as: - Wireless digital transmitter - Phone connectivity - Additional digital features/modules General Requirements: - Stable and reliable operation - Compact and clean PCB layout - Suitable for field-use prototype testing - Designed with future upgrade capability in mind Deliverables Required: - Schematic - PCB layout - Gerber files - BOM - Source design files - Firmware/code if microcontroller is used This is an early-stage working prototype for real plumbing and underground pipe locating applications.