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29 Oct 2014

photo-main

Low-cost, high quality reflow oven for surface-mount PCB assembly at home. Get professional results consistently and reliably!

ControLeo2 Reflow Oven - [Link]

8 Aug 2014

FT1094_bell-500x259

by Boris Landoni @ open-electronics.org:

Since when white light emitting high brightness LED are available, the handover from traditional lighting bulbs to the solid-state lighting has become irreversible: LEDs have an efficiency (expressed in lumens/watt) higher than that of almost all the traditional lamps (except, at the moment, the large sodium vapor lamps used for street lighting, unusable in closed environments for the high power required and the chromatic aberration they produce) at a cost that is today less prohibitive than it was a few year ago. They are indeed very sturdy and have a very acceptable ratio of luminous flux and size.

The perfect Remote, Programmable, Controller for interactive LED strips - [Link]

9 Jul 2014

 

3350

by linear.com:

The LTC3350 is a supercapacitor charger and backup controller IC that includes all of the features necessary to provide a complete, standalone capacitor-based backup power solution. Many applications require reliable short-term uninterrupted power in the event of a main power failure. Examples include data backup for solid state drives (SSDs) and nonvolatile dual in-line memory modules (NVDIMMs), power fail alarms in medical and industrial applications, as well as a host of other “dying gasp” power fail indicators. The LTC3350 provides all PowerPath control, capacitor stack charging and balancing, and capacitor health monitoring to ensure that the backup system is capable of reliable operation.

LTC3350 – High Current Supercapacitor Backup Controller and System Monitor - [Link]

 

2 Jul 2014

IMG_00861

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]


18 Jun 2014

CycleWithOverflow

0xPIT @ github.com writes:

This Reflow Oven Controller relies on an Arduino Pro Micro, which is similar to the Leonardo and easily obtainable on eb*y for less than $10, plus my custom shield, which is actually more like a motherboard.

As I believe it is not wise to have a mess of wiring and tiny breakout-boards for operating mains powered equipment, I’ve decided to design custom board with easily obtainable components.

The hardware can be found in the folder hardware, including the Eagle schematics and PCB layout files. It should fit the freemium version of Eagle

Reflow Oven Controller with graphics TFT - [Link]

21 Oct 2013

Julian Ilett demonstrates his Arduino Solar Charge Controller. He has mounted all of his Arduino modules to a piece of wood to keep everything nice and neat. [via]

“High efficiency values (96% – 97%) are achievable when the buck converter is stepping down from 18v to 12v. With a 72-cell panel and the converter stepping 35v down to 12v, the efficiency drops to around 88%.”

Arduino Solar Charge Controller - [Link]

28 Feb 2013

IMG_20120729_1801342

Zak Kemble build an AVR based PWM fan controller. He writes:

So this is a bit of a continuation on my 555 timer based PWM controllers, but now using microcontrollers and MOSFETs instead of 555 ICs and transistors. I made 2 versions, one with switches for speeding up and down and the other with a potentiometer like the previous controllers. I used ATtiny25 controllers running at 31.25KHz (8MHz internal RC / 256 prescaler) with a 3.3V supply, the MOSFETs I used are STP36NF06L with 0.045Rds and 2.5Vgs max, perfect for 3.3V, the MOSFETs only generate ~180mW of heat at 2A ((0.045Rds * (2A * 2)) = 0.18W) so no heatsink needed, you can barely feel them getting warm.

AVR microcontroller based PWM fan controller - [Link]

2 Feb 2012

Michael writes:

My name is Karel and I’m creating an open source temperature controller. Please see the FAQ for open source licenses. I initially started this project because I make my own prototype PCBs at home, using the toner transfer method, and found out the laminator I use, a Scotch TL-901, doesn’t run hot enough and it took several passes to get the board hot enough. Instead of taking the time to reverse engineer the control board that was in the laminator, I decided to make my own.

After I finished the first prototype, I quickly realized there could be a lot of uses other than controlling a laminator. Some that came to my mind included using the board to modify a window A/C to be used in a walk in cooler, measuring inside and outside temp to control a green house, using it to control an aquarium heater, or even controlling egg hatching. I’m sure there are lots of other uses that the open source community will find.

Open source temperature controller - [Link]

18 Nov 2011

TRIAC Dimmable LED Driver

LT3799 isolated LED controller with active power factor correction (PFC) is specifically designed for driving LEDs over a wide input range of 24V to 480V+. It is ideal for LED applications requiring 4W to over 100W of LED power and is compatible with standard TRIAC in-wall dimmers. The LT3799’s unique current sensing scheme delivers a well regulated current to the secondary side with no opto-coupler, enabling it to provide ±5% LED current accuracy. It also offers low harmonic distortion while delivering efficiencies as high as 90%. Open and short LED protection ensures long term reliability and a simple, compact solution footprint addresses a wide range of applications.

TRIAC Dimmable LED Driver - [Link]

7 Sep 2011

Custom Controller V2. Patrick writes – [via]

Hello adafruit industries. My name is Patrick McCabe and I am a 17 year old senior in high school. I was on the second ”show and tell” of yours. I showed off my custom controller I made. I made it so I can provide input to my robots and get information returned. It contains a LCD, Xbee transceiver, custom LCD Arduino micro-controller backpack, 3 button inputs, a potentiometer, and a Wii Nunchuck circuit board with joystick. The buttons will allow navigation through the menu system and sending simple commands within the menu. The Wii Nunchuck will allow for manual control of a robot by using either the joystick or through tilting action read by the accelerometer. The potentiometer will allow variables like speed to be adjusted on a robot.

Custom Controller V2 - [Link]



 
 
 

 

 

 

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