The sketch for today’s project is based on the example code shipped by Rocket Stream. Check out our tutorial on setting up the Arduino IDE to program ATtiny based microcontrollers to get some help. We will use the Arduino IDE to develop the code for today’s project, as such, you will need to install the Arduino IDE board support files for the ATTINY1634R microcontroller so it can be programmed using the Arduino IDE. Tiny Reflow Controller v1 bottom board (without LCD) Code An image of the tiny reflow oven controller is shown below. You can edit the design to make whatever modification you want or just use the Gerber files which have already been generated to produce your own PCB. The schematics and the resulting PCB were developed with KICAD and the files are attached in the zip file under the download section. The schematics for the project is shown in the image below. However, users can choose to get the through-hole version of the components so it can be implemented on a breadboard. Since most of the components to be used are SMD, it only makes sense to implement this project on a PCB. This BOM is also attached in the zip file under the download section and could be used to place the order for all the components at once. The list is definitely longer than this but so things doesn’t get messy, other components that are required are provided in the table below ![]() 8×2 LCD black character with yellow backlight.K-Type Thermocouple(Rocket stream recommends those with fiberglass or steel jacket.The following main components are required to build the project: Other components involved include an external Solid State Relay (SSR) which should be rated according to the current draw of your oven (heater) and a K type thermocouple which provides temperature feedback to the controller and an LCD on which information/status of the system is displayed.Īt the end of this project, you know the workings behind the Tiny Reflow Controller and you will have built up the courage required to attempt building one by yourself. It comes In-System Programmable via SPI Port and can be programmed using the Arduino IDE. It is a High Performance, Low Power AVR® 8-bit Microcontroller with Advanced RISC Architecture, 16K Bytes of In-System, Self-Programmable Flash Program Memory and 256 Bytes of In-System Programmable EEPROM with support for up to 100,000 Write/Erase Cycles. The ATtiny1634R is one of the new ATtinys we discussed in the last article. It is one of the cheapest designs on the internet as Rocket Stream was able to reduce the overall cost of the design by not using a development board like the Arduino and using as many SMD parts as possible in place of through-hole components, to reduce the time that goes in and the work involved leaving only the terminal block and the LCD connector as the only through-hole components. The Rocket Stream’s Reflow Oven Controller v1 is powered by the ATtiny1634R and uses the latest thermocouple sensor interface IC MAX31856 from Maxim. ![]() However, for today’s tutorial, we will look at the first version of Rocket Stream’s tiny Reflow Oven Controller v1 which is probably the most well tested DIY reflow oven controller on the internet, as it is the one being used by Rocket Stream themselves for the manufacturing of their boards. Overall I am very pleased with the unit and it certainly addresses my PCB needs from 1 to 50 at a time.As mentioned above, reflow oven controllers are quite important in ensuring just the right amount of heat is applied in the soldering process for SMD components and this importance has led to the development of quite a number of different Reflow oven controller projects, which someone can find on the internet. If anything I may tweak the various zone temps or conveyor speeds depending upon the solder paste, etc. I have used it with 2/4/6 layer PCBs with fine pitch (0.5mm) LQFP/QFN, BGA (0.65mm), and 0603/0402 parts with no issues. The only real caveat is that it takes about 10 minutes to come up to temp, but it works fantastic and allows me to continually run as many PCBs I like. Also I added ducting to exhaust any fumes that might result. For the table, I welded one out of metal so that there would be no issues with regards to supporting the weight or residual temp issues. about $2K by the time I had it in my hands. Basic specs are: - 5 Zone comprised of 3 up and 2 down - Just over 3 feet in length weighing about 200 lbs - Needs 220VAC single phase or can be wired for higher 3-phase voltages - I paid about $1200 for the unit with about $600 shipping. ![]() I looked around and bought a Puhui T-960 ( ) and I have never looked back nor have I used by old converted toaster oven. It was fine, but was a pain when I had to run through 10 or 20 PCBs that would not all fit into the oven. I used a converted toaster oven for years.
0 Comments
Leave a Reply. |