Our friend Vasilis posted a video story of a successful SMD reflow process… at his home, amazing!
Powered by the Low Budget Manual Pick and Place : http://vpapanik.blogspot.gr/2012/11/low-budget-manual-pick-place.html
SMD reflow at home - [Link]
HP Pavilion DV9000 – DV9500 Series GPU Reflow FIX. This video shows how to repair Nvidia GPU issue on HP Pavilion DV9000 series laptop. In this video you see a DV9500 motherboard, this laptop had a completely black screen that fixed using this method.
Other common symptoms are:
- Black Screen
- Vertical – Horizontal lines
- Color flashes
- image distortion
- Laptop power off
- RGB lines
HP Pavilion DV9000 Series Laptop Display Repair – GPU BGA Reflow - [Link]
They say you are only as good as your tools. This is a statement I can vouch for, as better tools can make the difference between a sleek and well designed prototype and a rats nest covered breadboard. Unfortunately as an electronic hobbyist you don’t always have the budget of a big tech company at your disposal. But hey, that’s what DIY projects are for!
Starting off as a hobbyist or even small tech company designing and building electronics you will soon learn that most of the fun IC or MCU chips are either cheaper in, or only available in, surface mount form, and fancy reflow ovens are expensive. But a soldering oven isn’t much different from a toaster oven– the only difference is the accuracy and temperature settings.
That is why I’m going to show you how to build your very own Soldering Reflow Oven for under $100 from an old/new standard toaster oven, thermocouple and a microcontroller.
DIY Soldering Reflow Oven - [Link]
Sorry for the lack of photos in this article, but we didn’t think about it being worth reporting until after it had all happened. Infact, we were concerned about retaining any evidence of the events. Inspired by the many toaster-oven reflow projects floating around the Internet, we set out to acquire the power to solder all those tiny SMD components ourselves. Toaster ovens aren’t that common in the UK and we were aiming for the lowest cost possible, so we hit ebay in search of a bargain. A very cheap Black and Decker Toast-R-Oven was on offer. The description was “only used a few times”, and the grainy photos showed an indeterminate “foreign” plug with an adaptor. Now, we aren’t generally in the habit of assuming that “some bloke on ebay” must know what he’s doing with electricals, but with the auction starting at £5 (and not going up a huge amount from there by the end) it seemed like a good idea.
Engineering of a reflow oven controller - [Link]
Most of us simply can’t afford an industrial reflow oven and this pain was also felt by the folks over at Rocket Scream Electronics. So armed with an idea and some help from the Adafruit Reflowduino sample code, the Reflow Oven Controller Shield was born. The shield is based off the familiar MAX6675 Thermocouple Amplifier and the PID library written by Brett Beauregard.
Toss in a few solid sate relays (SSR) and a K-Type Thermocouple, like the ones Adafruit has here, and your good to go. I like the idea of a standalone PID controller as it’s one less PC controlled device to worry about. [via]
Reflow Oven Controller Shield - [Link]
Dave show you how to solder a small 3 axis accelerometer LGA surface mount chip “dead bug” style onto a microcontroller prototyping board. This technique allows you to easily prototype projects using tiny SMD components designed only for reflow soldering.
Dead Bug Prototype Soldering – [Link]
One of SMD soldering techniques is using a reflow soldering oven. Reflow soldering technique is used when it is impossible to solder components by hand. These may include ball grid arrays (BGA), small pitch quad flat packs. Or simply solder any SMD element to make board look professional and smooth.
Special care has to be taken when soldering with oven. Specialized ovens have controllers built in that control overall soldering process by adjusting temperatures, but if you are using regular oven that is much cheaper than specialized soldering ovens, you need to build a controller. Controller has to adjust soldering oven temperature according to chart that is stored in memory. Together with keypad this gives great interactivity.
Soldering oven controller is based on ATmega32 microcontroller that uses ADC input to read NTC temperature sensor. Current temperature is displayed on graphical LCD as chart. As authors state – system works OK, maybe additional blower could be added for cooling speed controlling as without fan it is to slow. [via]
Reflow Soldering Oven controller with graphical LCD Display - [Link]