I’m still using my 20$ soldering station which I use since I got started with electronics. Now it’s time for an upgrade. Weller® quality is exceptional, but also exceptionally expensive. Some guys designed an open source Weller® soldering station which is compatible with Weller® tips. This post describes the building process.
Bill of Materials
|Supplier||Order number||Price / piece|
|Capacitor 0.1uF||5||10||farnell||432210||€ 0.0106|
|Resistor 10k||3||100||farnell||2502397||€ 0.0021|
|Resistor 1M||2||100||farnell||2502399||€ 0.0021|
|Resistor 1k||10||100||farnell||2502396||€ 0.0021|
|MOSFET BSN20||2||10||farnell||1081309||€ 0.332|
|Capacitor 10uF||2||1||farnell||1650980||€ 0.289|
|5V Regulator||1||5||farnell||1467762||€ 0.309|
|Resistor 56k||1||100||farnell||2502472||€ 0.0021|
|Resistor 100R||1||100||farnell||2502395||€ 0.0021|
|MOSFET IRF7416||1||1||conrad||162476-29||€ 0.50|
|Jackplug pcb||1||1||conrad||734101-89||€ 1.35|
|Jackplug tipholder||1||1||conrad||595223-89||€ 1.46|
|Jackplug male||1||1||conrad||595197-89||€ 1.85|
|Microphone cable||2||1||conrad||608304-89||€ 2.30|
|TFT 1.8" display||1||1||banggood||SKU103769||€ 4.68|
|Arduino Pro Mini 5V||1||1||banggood||SKU066315||€ 2.65|
|Power Supply 12V 8A||1||1||you||old computer||€ 0.00|
There was some confusion about the components, since the PCB I received was version 1.5 while the schematics on Github are version 1.6. The assembled board looks like this:
There is one important remark: I did not place R6 at the indicated pad, but between the display RST pin and the Arduino A6 pin. I did this because the display did not always boot. The reset pin was wired to +5V with a resistor, so always enabled. By wiring the RST pin to A6, the reset sequence can be controlled from the software.
With this hack, I no longer experience problems with the display. edit: After hassling for hours, I figured out that it works best when the RST pin of the display is not connected at all…
The SMD components are placed according to the following table:
|C7||10uF tantalum capacitor|
|IC2||78L05 power regulator|
|C2||10uF tantalum capacitor|
|R6||DNP, see remark!|
An old computer power supply is used to provide 12V at more than 8 Amps. This saves the cost of buying a dedicated power supply and gives the power supply a second life.
The next post will describe how I built it all into a nice housing. I already bought this one from conrad: GSS05
I have also stumbled upon Weller home mad soldering station 2 months ago and decided to build it. Right now I’m still waiting for PCB’s and TFT display to arrive.
I’m curious how metal case work out for you (GSS05) as I have decided to put everything together (transformer + soldering station electronics)
I just can’t wait second (2/2) part of this build log !!! 🙂
Looking forward to hear from you !
I am half-way with the GSS05 but I have limited access to a CNC machine. Expecting to do part 2 within a month from now.
Hallo wo kriegt Mann die Platine PCB her.