by Henrik’s Blog @ hforsten.com:
Nowadays many of the most “exiting” chips come only in leadless packages, such as BGA and QFN which are hard or impossible to solder just by soldering iron, because leads are under the chip where they can’t be reached. These kinds of chips are usually soldered using reflow soldering. In reflow process solder paste is used instead of solder wire. It contains very small balls of solder in flux, diameter of the balls is just few micrometers. First this paste is put on the contact pads, then components are placed on the pads and whole board is heated in reflow oven where solder balls in the paste melt and attaches the components firmly in place.
Toaster oven reflow controller - [Link]
We’ve again reached record attendance of our webinar! More than 100 registered patricipants and 4 winners of Weller products.
Last webinar before summer was dedicated to Weller. Rudolf Horl from Weller prepared interesting information about new soldering station WSD81i, as well as other information about various functions or tips concerning care about soldering station and tips.
Record from SOS webinar – Mastership in soldering - [Link]
Solderdoodle is a portable, cordless, USB rechargeable soldering iron. Solarcycle @ instructables.com writes:
After learning how to use 3D printers, one of my friends asked if there was such a thing as a USB soldering iron and I said that I had instructions to build one, but the battery was external. I then realized that I could create my own case design on a 3D printer and put the battery, charge controller, and other parts inside as one single unit! It worked! .stp files for the case are provided below.
Solderdoodle: Open Source USB Rechargeable Soldering Iron - [Link]
Diogoc shared his Hakko T12 soldering controller in the project log forum:
I finally finished my Hakko T12 soldering controller.
Thanks to sparkybg and arhi for all help and sugestions.
Some features of the controller:
– 3310 graphic display
– rotary encoder for easy and fast temperature selection
– sleep mode when the iron is in the stand
– turn off when a long time in sleep mode
– audible indications
– intuitive menu navegation
– percentage visualization of output power
– powered by a compact and lightweight 24V dc laptop power supply
– ambient temperature sensor for a better cold junction compensation
– lcd backlight control
– alarm for very high temperature, turning off immediately the heater
– indication of tip removed to allow hot swapping the tips
– bootloader for easy firmware upgrade via integrated usb port
– usb port and c# software to monitoring all parameters and help to adjust the pid parameters
The controller still need a little adjust in the PID parameters but for me it is almost perfect.
Hakko T12 soldering controller - [Link]
This page provides documents about a cheap SMD solder station built as an Arduino shield (Arduino UNO). It supports active soldering tips from Weller (RT series) which contain the heating element as well as a sensor and provides a standard 3.5 mm jack. Together with the corresponding female connector you will get a compact SMD soldering iron (see pictures below) with very fast heat up times of a few seconds.
SMD Soldering Station for Weller Soldering Tips - [Link]
Carlazar posted pictures of his simple soldering iron driver (SSID) with Arduino PID control. [via]
Main features are:
– Any thermocouple type irons.
– Additional control mode: On-Off controller (besides PID PWM).
– External power supply: Some standard Notebook power supply DC 19V, 4.74A.
– Small dimensions: It fits into 90mm x 110mm x 45mm (WxDxH) box.
– Easy to assemble.
– Simple design: only a few components (besides Arduino).
The HQ soldering iron HQ20/HQ30 (24V, 48W) was used. It has the E-type thermocouple built in (68uV/degC) but you can change that value in software according to the soldering iron that is used (for example K-type is 41uV/degC).
Simple soldering iron driver (SSID) with Arduino PID control - [Link]
Instructions for Soldering and Desoldering SMDs featuring up-close shots of fine-pitch soldering.
Surface Mount Soldering 101 - [Link]
This is a walk-through for making cheap high quality SMD metal stencils at home, using commonly available materials.
DIY home-made SMT metal stencil - [Link]
An in depth tutorial showing how to solder surface mount parts. Covering the tools, techniques and tips that can really help learn how to properly solder electronics! If you are new to soldering this video should have you soldering SMD components in no time!
With just a bit of pratice it becomes much easier to solder SMD then through hole soldering. As shown in the video the main key is lots of flux, but be sure to properly clean your work once you are finished soldering it.
HowTo SMD Soldering - [Link]