I have used the PD 3.0 with 9V/3A for supply. It can be powered from an USB-PD power supply (even suitable laptop USB-C power supplies) or with an PD-Power bank for soldering on the go.
The heat up time from 25°C to 350°C is around 6s. Auto-standby temperature is around 180°C, by picking up from the rest around 3s are needed to reheat.
The user-interface consist tree LED's and two buttons. The LED's indicate which temperature profile is active (Low, Mid or High) as well as the operating modes (user-standby, auto-standby, auto-off, warm-up and overheat).
Its simple! - If any LED blinks, the Soldering Pen is not ready or at the desired temperature range. Steady light than means that the pen is ready.
I have chosen the simple 3-LED-Display because there is no need to set or know the temperature in 1°C steps. There are three basic groups of soldering types:
- Very sensitive components(e.g. temperature sensors)
- Regular sensitive components and Wires (e.g. Resistors, Capacitors, most types of IC's)
- Not sensitive parts (e.g. large copper areas)
Based on this knowledge I implemented the three profiles.
One button controls the user-standby mode the other changes the temperature profiles.
The pen fits perfectly in the original Weller safety rest WDH 51.
Next steps for this project are:
- Built a self printed rest (similar to the WDH 51)
- Order more professional printed housing (powder or resin)
- Try more USB-C-PD Power supply's how they handle the current peaks.
Here are the video demonstrations: