/ Pazhong services
We design custom circuit boards for connected devices and controllers, then assemble and test the prototypes in our Lahore workshop. Because the same team writes the firmware and prints the enclosure, every board is designed around how the finished product will actually be used and housed.
A circuit board is one part of a product. Connectors have to line up with the housing, antennas need room to work, and the firmware has to match the pins and power budget. We design the board, firmware and 3D-printed enclosure together, so the first assembled prototype fits and runs rather than needing a second round to fix mismatches.
Our work covers microcontroller boards built around ESP32 and Arduino-compatible chips, sensor interface boards, GSM controllers and power switching. The GSM relay control board in our portfolio pairs a main controller with a SIM800L modem, a buck-converter power stage and screw terminals with a 16-channel relay board rated at 10 A per channel, so pumps and machinery can be switched over the mobile network.
Not every idea should start as a custom board. When a circuit is unproven we often build it first on perfboard or with development modules, as we did for our ultrasonic proximity alert system, documenting the wiring along the way. Once the behaviour is right, the circuit moves to a PCB that is smaller, more reliable and repeatable.
Bare boards are made by a PCB manufacturer from the fabrication files. Prototype assembly, soldering and testing happen in our workshop, where we check each board against the firmware before it ships. We handle one-off builds and small production runs, and can prepare files for your own manufacturer if you prefer.
If you already have a board that needs a revision, a cost reduction or a replacement for an obsolete part, send the schematic and layout files you have. If files are missing, clear photos of both sides of the board are a useful starting point for a conversation.
PCB designGSM Relay Control BoardA custom controller PCB with a SIM800L GSM module, on-board power regulation and a 16-channel 10 A relay bank for switching pumps and loads over the mobile network.Read the case study →
EmbeddedUltrasonic Proximity Alert SystemFour ultrasonic sensors around an Arduino Nano that sound buzzer alerts when obstacles come close. We designed the circuit and built it on perfboard.Read the case study →
IoTSmart Farming PlatformFarm monitoring and control: live temperature, humidity, water level, pH, soil moisture and TDS readings, with pumps and lights switchable from anywhere.Read the case study →/ FAQ
Yes. Send the schematic and layout files, or photos of the board if the files are missing, along with what needs to change.
Yes. Firmware for ESP32, Arduino and Raspberry Pi is a core part of our work, and designing both together avoids pin and power mismatches.
Yes. Enclosures are modelled alongside the board and printed at Printonio, our 3D printing studio in Lahore.
The handover, including fabrication files, bill of materials and documentation, is agreed in the scope before work starts.
Email info@pazhongautomation.com or call +92 304 5929006. Pricing and timing are agreed after reviewing the scope.