Summary of Hardware and Arduino Code for DIY WMRP-Solder Station
This project is a DIY WMRP Solder Station featuring a low offset op amp for precise soldering tip temperature measurement using a type C thermocouple, cold junction compensation via a PTC sensor, and input voltage monitoring for a 3-cell LiPo battery. It includes soldering pencil current measurement, standby detection when resting on the stand, three buttons for saving and recalling temperature values, and a rotary encoder for temperature setting. The display is an illuminated 16x2 LCD module. The device supports USB debugging and firmware updates, housed in a compact, clean enclosure with safe power input sockets and ESD protection.
Parts used in the DIY WMRP Solder Station:
- Low offset operational amplifier
- Type C thermocouple
- PTC sensor (KTY82-210)
- LCD display "Blue I2C 1602" from eBay
- Modified connector "Amphenol T 3437 000"
- 4mm safety sockets (red, black, green/yellow)
- Rotary encoder
- Rotary encoder knob
- Display frame "EA027-2UKE"
- Aluminium enclosure "Proma 131020"
- USB interface for debugging and firmware update
Features:
- low offset op amp for soldering tip temperature measurement with type c thermocouple
- cold junction compensation using the PTC (KTY82-210) included in the WMRP soldering pencil
- input voltage measurement (for use with 3 cell lipo battery)
- soldering pencil current measurement
- recognizing if the soldering pencil rests in the stand (–> standby)
- 3 buttons for save and recall temperature values
- rotary encoder to set soldering temperature
- illuminated 16×2 character LCD module
- USB for debugging and firmware update
- clean and small enclosure
- 4mm safety socket for +12V power input and a protective earth socket for connection to ESD protection
The BOM in the layout folder includes only the parts on the PCB(s).
Parts (not on PCB):
- lcd display from ebay “Blue I2C 1602”
- modified connector “Amphenol T 3437 000” (http://www.mikrocontroller.net/topic/143288#1500819)
- 4mm safety sockets (red, black, green/yellow)
- rotary encoder knob
- display frame “EA027-2UKE”
- aluminium enclosure “Proma 131020”
For more detail: Hardware and Arduino Code for DIY WMRP-Solder Station
