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Add the following snippet to your HTML:. Read up about this project on. Soldering station supported Hakko T12 tips and rework station D. This is a second release of combined soldering iron controller for Hakko T12 tips and D rework station based on STM32 micro controller. The controller supports using both devices at the same time. The project was created because Maker B R requested it very much. Hope, it would be useful for many enthusiasts like me. Second release of the controller contains minor schematics changes:.

Otherwise, SPI version of the display would be initialized. There are two displays shown on the complete schematics below, but the only one display can be connected to the controller. You can use either OLED display version, but only one. The controller requires big size PCB to fit all the components so I suppose it is better to split the controller in two separate boards: main board and display board. It is convenient to solder rotary encoder to the display board and use encoder neck to fix this board on the acrylic front panel.

See the picture below. To make display PCB more compact, it is convenient to turn the display upside down the connector is on lower side of the PCB. So the display image is rotated by degrees in the firmware. If you are going to connect the OLED in normal state, you should change the constructor in display. Also, if your display is not built on sd chip, you should change this file. The Hakko T12 soldering tips are very convenient tools: they are heating extremely fast and have a sensor inside that allows to keep the temperature very accurate.

It is a big pleasure to use such a amazing tool. The tips require just three wires: plus, minus ground and earth ground. The heating element inside the tip is connected consequently with the thermo couple allowing to decrease the required wires. It makes the cable very flexible and light weight.

stm32 schematic

A dedicated handle is required to use the T12 tips. The handle I would like to recommend is FX It has an attractive look and is convenient to use. Also it has enough space for tilt switch and thermistor NTC type inside. To connect the handle to the controller you have to replace the standard connector with some kind of aviation plug which can be ordered on eBay, for example. GX is a good choice.

Also, if you plan to insert tilt switch and thermistor inside the handle, you should replace the cable to 5-wires one.By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service. Electrical Engineering Stack Exchange is a question and answer site for electronics and electrical engineering professionals, students, and enthusiasts.

stm32 schematic

It only takes a minute to sign up. Is it there to mimic a battery? If yes, won't it be better to put a reverse leakage current protection diode in between? Why not use 1 uF capacitors on either side of R26? Is this bigger network used for better noise filtering? Those are standard decoupling caps for each VDD, and a couple more for good measure.

For some reason the designer has decided to collect them all in a single location in the schematic near VBAT rather than distributing them among the supply pins they are decoupling.

R26 is there presumably so that it can be removed or left unplaced if battery-powered operation of the MCU is preferred. No they're decoupling capacitors. The decoupling caps are needed with most ICs especially digital ICs because almost all of these use CMOS logic and this logic has the habit of drawing a current pulse from the supply when it switches.

The decoupling capacitors provide a path for these pulses and stabilize the supply voltage. Without them operation of the IC would be unreliable. Because then the connections to some of the pins would be longer, the decoupling would then be less effective. R26 can simply be there for debugging purposes or to add extra supply decoupling if needed for the Vbat pin.

Then R26 could be ohms for example and that would provide increased supply filtering for Vbat. Those nF are probably decoupling capacitors. They will be spreaded over the board. There job is to supply power during short peaks in digital circuits. There are two good reasons for using multiple capacitors instead of one big capacitor.

One is that the capacitors can be spread around which makes the PCB track length from a switching load to one of these supply-hold-up capacitors shorter and therefore of lower impedance. That is important at high frequencies and lessens generated EMI. The second is that the overall Equivalent Series Resistance ESR of the terminals of all those capacitors is less than that of one big capacitor.

That also gives the lower impedance and lower generated EMI benefits. Sign up to join this community. The best answers are voted up and rise to the top. Home Questions Tags Users Unanswered. Asked 3 years, 9 months ago. Active 3 years, 9 months ago. Viewed 6k times. What's the use for R26?

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It has a value of 0 ohms. Whiskeyjack Whiskeyjack 6, 4 4 gold badges 32 32 silver badges 78 78 bronze badges. All the caps go directly to to VCC as well, I admit, the schematic's not particularly well laid out. Active Oldest Votes. Why not one large capacitor?The catch is, they usually take a few weeks to arrive and you need to provide the design.

The design files described in this post are all available in a Github repositoryif you want a reference to follow along with. You can download and install the whole thing from their website; your package manager might also have it available, but that could be an old version and KiCAD has improved a lot over the past couple of years.

It has matured into an accessible and powerful tool, and it is still under very active development with the occasional new feature being added. The first step in designing a printed circuit board is defining the abstract circuit that we want to lay down on the board. If not, here is a quick overview.

If KiCAD does not have a schematic file available for one of our parts, we can create one.

Programming STM32 Based Boards with the Arduino IDE

This is often necessary if you use integrated circuits, because there are just too many chips available to keep up-to-date entries for all of them in the default libraries. Would you want that job? Once we have a complete abstract circuit, we need to tell KiCAD what each part will look like in the real world. This step will not be necessary in this tutorial and I will be skipping it to keep things simple, but it is useful if you need to use oddly-shaped parts.

So all you have to do is draw a physical outline for the board, place the parts within that outline, and then draw the appropriate connections between them. KiCAD includes a design-checking feature too, which double-checks the schematic against the physical board and tells you if anything anything is incorrectly connected or disconnected before you send the board off to be manufactured. Before we get started with the actual tools, a mild word of warning: KiCAD uses keyboard commands instead of mouse clicks for a lot of common operations, so the primary mouse button might not always do what you expect.

I will call out all of the keyboard shortcuts used throughout this tutorial, but you should be aware of that quirk. On the bright side, you can press the? If you accidentally press a random key and something weird happens, that can be a useful safety net. Also, pressing the escape key will usually cancel the currently-selected tool. A random QFP32 chip in its natural environment; from a Wikipedia pagebecause they use royalty-free images. And how should we connect each one to our circuit?

The pin QFP chip looks like this:. The pins marked VDD should be connected to the positive voltage supply, and those marked VSS should connect to ground.

In KiCAD, the process for creating a new part is pretty simple. Later, when we assign a pad physical footprint to this pin schematic part, pins and pads with the same number will be linked.Add the following snippet to your HTML:.

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Read up about this project on. Using STM32 to build a soldering iron controller. This time with a graphics OLED display.

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Each soldering tip has a temperature sensor, a thermo-couple that generates very small voltage, about several millivolts, so to check this voltage operating amplifier is implemented in the schematics.

You can see the sensor part of the schematics on the picture below. To fix the issue in tip connected detection procedure, capacitor C8 has been removed from the schematics and new firmware released.

This is a second release of the soldering iron controller for Hakko T12 tips based on STM32 micro controller. The project is an evolution of the soldering controller built on atmega micro controller.

This time the micro controller resources, mostly the flash memory amount, allowed to implement graphical OLED display. It was a pleasure to investigate the STM32 micro controller and I must say that the manufacturer created a great product.

STM32-Based Soldering and Rework Station

If you have built previous v1. Previous version of firmware and schematics is available on github repository. Otherwise, SPI version of the display would be initialized. There are two displays shown on the complete schematics, but the only display can be connected to the controller. You can use either OLED display version, but only one.

The controller requires big size pcb to fit all the components so I suppose it is better to split the controller in two separate boards: main board and display board. It is convenient to solder rotary encoder to the display board and use encoder neck to fix this board on the acrylic front panel. See the picture below. To make display pcb more compact, it is convenient to turn the display upside down the connector is on lower side. So the display image is rotated by degrees in the firmware.

If you are going to connect the OLED in normal state, you should change the init method in display. Also, if your display is not built on sd chip, you should change this file. The github repository contains binary firmware versions for ssd and sh OLED displays. The Hakko T12 soldering tips are very convenient tools: they are heating extremely fast and have a sensor inside that allows to keep the temperature very stable.

It is a big pleasure to use such a amazing tool. The tips require just three wires: plus, ground and earth.

STM32-Based Soldering and Rework Station

The heating element inside the tip is connected consequently with the thermocouple allowing to decrease the required wires. It makes the cable very flexible and light weight.

To use the T12 tips you may need to order a handle. The one I would like to recommend is a FX The only problem is its connector. To connect the handle to the controller you can replace the standard connector with some kind of aviation plug which can be ordered on eBay, for example. GX is a good choice.When looking at a few pages on the STM32; I was a bit skeptical on how easy it would be to program this board. I have seen tutorial where you need to fiddle with the onboards jumpers; then strategically press the reset button.

That seemed really not user friendly. In fact; it is really easy to program the blue pill board, and none of this gymnastic is actually necessary. Chances are the shop that is selling the blue pill board also sells a ST-Link. These cheap copies do not provide a full pin JTAG connector; but it is not needed for this Cortex M3 based micro-controller; so it is perfectly adequate for the job.

The installation might take a while. The Blue Pill is pretty much devoid of any on board peripherals, but it has at least an on board LED.

At the end you should have a message similar to the one below:. Note: My STM32 board came pre-loaded with a blinking sketch. To go further and make full use of the board and its hardware peripherals; be sure to refer to this pinout diagram; courtesy of Rasmus Friis Kjeldsen:.

Search Search ….Arduino would have been the first board for many hobbyists including me and engineers out there when they started with electronics. However, as we start building more and dig deep we would soon realise that Arduino is not industry ready and its 8-bit CPU with a ridiculously slow clock, it does not give you enough juice for your projects.

The STM32 board a. It looks very much similar to the Arduino Nano but it packs in quite a punch. The Development board is shown below. These boards are extremely cheap compared to the official Arduino boards and also the hardware is open source.

Because of this, the MCU can operate in deep sleep modes making it ideal for battery operated applications. Since the MCU works with 3. Even though the MCU operates at 3. The pin of the MCU are neatly pulled out and labelled as header pins. It also has two header pins which can be used to toggle the MCU boot mode between programming mode and operating mode, we will learn more about these later in this tutorial.

May be since the board is blue in colour and can give a boosted performance to your projects someone came up with this name in it just stayed. This is just an assumption and I have no source to back it up. If you want to know more on technical features of the Microcontroller then you can refer to its Datasheet. You might also be interested in the Reference manual and the Errata sheet of the Microcontroller as well which is also linked. The complete pin-outs of the STM32 Blue pill board is shown below.

As you can see each pin is neatly labeled against it. The labling is also similar to the Arduino boards.

Симуляция STM32 в Proteus 8.6. Simulation microcontrollers STM32.

That is the G is used to denote the ground pin, 3. Unlike Arduino boards, the STM32 development board has to be manually set to programming mode using the boot 1 and boot 0 jumper wires. The position of Boot 1 is normally not disturned. But the boot 0 jumper has to be set as 3.

We will learn more about it when we upload the program on our board. But what made this board a lot popular is its ability to be programmed with the Arduino IDE. This way people can get started and build projects with STM32 in no-time since many will be familiar with Arduino IDE and its easy to use programming language and readily available libraries.

The ground is connected to the Ground of STM Now you might be wondering why we are not using the micro-USB port to program the board just like any other Arduino boards. Howerver this bootloader can be flashed into the STM32 board and then the micro-USB port can be directly used to upload the programs. But at the time of documenting this article the bootloader has some bugs and is currently still under development. Make sure you select your correct operating system.Welcome, Guest.

Please login or register. Did you miss your activation email? This topic This board Entire forum Google Bing. Print Search. Read times. Remove resistor R10 10k, it adds unnecessary 0. A replacement controller works.

PT Dreamer's Blog reverse engineered it and made custom open firmware for it. Lately, firmware needs an activation key first run. Mine was open circuit.

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Edit: oops I meant C4. Lecturer: "There is no language in which a double positive implies a negative. After a hint I got from another user on twitter, I assume R10 was intended as protection to prevent reverse leakage current from flowing through the diode into the battery when system vcc 3V3 is present. I have removed R10 on my unit, problem solved.

Another known issue but related to the power supply, not the controller board is poor isolation between primary and secondary, caused by the output diode heatsink which extends on the top side from the primary high voltage tracks up to the secondary low voltage side. JPG The following users thanked this post: Johnny B GoodHemi Earlier version PSU's like V2.

The snubber cap is only rated V.

stm32 schematic

There's no approvals here, no idea how the transformer is wound if it would pass the few kV hipot test for the double-insulated test. The following users thanked this post: oPossumvoltlogHemi Hemi Contributor Posts: 49 Country:. I've played a bit with these OLEDs and found that I needed to include a second pause in my program at startup to give the display some time before I sent the initialization commands to it. KSGER might be a bit generous in the startup delay to make sure the display is definitely ready to go before trying to initialize it and display something.

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Only a theory. The following users thanked this post: Chris So for 6 seconds I wonder if I have the thing plugged in or turned on.

Soldering Iron Controller for Hakko T12 Tips on STM32

Both delays are too long. The power supply is another 3 seconds even after replacing capacitor. I see the power LED on the power supply board light up on mine in less than a second, but no signs of life on the front for a few seconds with my 2.