I plan to make a pre-heater for my SMD works, and i will need a controller for the air heater. From my job i know the PID controllers and how efficient they are, but i did not really know how they work. After some research i did, i sound the “secrets” of the PID systems (and i also wrote a theory for PID systems). So, now i feel ready to turn theory into product. Many will say again that i could spent $40 to get a PID controller… Yes, i know… But i DON’T want to. For me, making projects is not a chore, it is my hobby, i do it for fun.
K-Type Thermocouple PID Controller - [Link]
Dave show you how to solder a small 3 axis accelerometer LGA surface mount chip “dead bug” style onto a microcontroller prototyping board. This technique allows you to easily prototype projects using tiny SMD components designed only for reflow soldering.
Dead Bug Prototype Soldering – [Link]
A cheap manual suction pen for handling SMD parts: [via]
Ah and wrt “suction pen” – I made the syringe with vacuum pump and it works but I don’t like it, I found then for 3.5$ a working device that does not require power and works like a charm I strongly suggest everyone get one
Vacuum sucking pen for SMD parts – [Link]
Last year in one of my classes we were required to make an ‘artefact’ or something that reflects the interests of the class. Most people make posters and the past two quarters that’s what my class did too. Posters however are static, usually boring, and don’t reflect that fact that everyone in the class is an EE major. We decided posters are for noobs and decided to go off the wall a little and make an LED matrix display. Lucky one of my friends John Wathen already had this beautiful 16×24 Green SMD LED matrix that he built back in high school.
16×24 LED Matrix – [Link]
Arduino based POV globe capable of displaying monocolour bitmaps upto 72 pixels high and x width. (uses 72 LEDs, and one input to get rotation speed)
Arduino byte array for images are generated using the c# program included in this project
Image displayed is synch’d to speed of motor using a reed switch, this allows image to display around hole globe correctly, and maintain a constant position.
Code has been added to move the image slowly (so globe rotates nicely)
POV Globe using arduino (atmega328P) and 72 SMD Leds – [Link]
Herctrap always sends us videos that he stumbles upon. This time, he sent us this home-made device, for SMD parts re-working and -perhaps- soldering as well. I really did not know this technique, so i think that, although i there is not any How-to info from the maker (dammitdarrell) which is always disappointing, this is a nice idea for those who work with SMDs. The make is very simple, the PID controller is a commercial type with input for a thermocouple (K-type most probably). Two 300w cartage heaters are used to heat the aluminum block, controlled by a relay. Notice that the relay sparks upon arming, which means that either you need to use a solid state relay, or a bigger load relay. The heated plate will pre-heat the PCB to work with SMDs easier. [via]
DIY PID-controlled soldering hotplate - [Link]
This project is a LED reading lamp using SMD Leds.
At night, when I read in bed and my wife is trying to sleep, the lamp on the night stand is kinda bright and obnoxious and, even though she says it doesn’t, the light disturbs her. I had been using a little USB-powered LED lamp that I bought for my laptop on long night time airplane rides. However, I can’t charge my iPhone while I’m using that light. Only one USB cable available at the night stand. Also, that light isn’t quite bright enough for my liking. What to do?
LED Reading Lamp – [Link]
This project is a LED mood lamp using SMD RGB leds mounted on a dodecahedral assembly of custom circuit boards. In that way the light pattern is even. [via]
The first thing I did was devise a plane for the “bulb.” I decided to go with a dodecagon, which I believe means a 12-sided object. Actually, I had no idea what one of these things was called. I just figured that I needed pentagons to make something more globe-like than a cube. I wanted light to emanate outward from this bulb thing like a light bulb, but with as few sides as possible. The sides were no doubt going to be PCBs, so the less complex, the better. Not that this wasn’t one of the most complex circuit boards I’ve ever built in my short time as a hobbyist circuit builder.
A potentiometer controls the dimming of the LEDs. The other knob on the breadboard is a rotary encoder. This allows the user to change the mode of the lamp from a plain white for reading to an auto-cycling rainbow of colors to a user-selectable color. The built-in pushbutton changes the mode. The rotary encoder’s knob changes the speed of the auto-cycling colors or the user-selected color.
LED mood lamp – [Link]
This project shows how to use a frypan for surface mount soldering. It uses a thermistor sensor to measure the frypan temperature and a solid state relay to control it. The overall device is controlled by an Arduino. To gain fine control of temperature the relay is controlling the heating element on and off. It’s something like low-frequency Pulse Width Modulation. [via]
Computer-controlled frypan for surface mount soldering - [Link]