Hello guys! I just wanted to ask you guys about some component replacements so that I can recreate the W1209 Digital Thermostat Module.

The parts I want to replace are the following:

AMS1117-5.0
STM8S003F3P6

Also, what values do you think I should use with the Diodes (D1) and Transistor?

I know you'll ask me "Why don't you just buy the board?", As a student I want to learn how the past inventors of this circuit made the whole project, and also it is summer in my place I want to make a thermostat and learn at the same time. I hope you can give me a bit of your time, thanks!

 

Show us your work. What have you done?

 

AMS1117-5.0 is a +5V 3-terminal voltage regulator. A LM7805 linear regulator will work but note that the pin-out is different.
LM1086-5.0 is a replacement

You can replace the STM8S003F3P6 but it will not work. It is a microcontroller and needs to be programmed.

 

Show us your work. What have you done?

Hello! I haven't done anything yet, just doing my research for now.

 

AMS1117-5.0 is a +5V 3-terminal voltage regulator. A LM7805 linear regulator will work but note that the pin-out is different.
LM1086-5.0 is a replacement

You can replace the STM8S003F3P6 but it will not work. It is a microcontroller and needs to be programmed.

Thank you! I don't have the means yet to get both the AMS1117-5.0 and STM8S003F3P6

 

you don't have means? they are readily available and low cost parts

https://www.digikey.com/en/products/detail/umw/AMS1117CD-5-0/17635255
https://www.digikey.com/en/products/detail/stmicroelectronics/STM8S003F3P6/2765682

 

you don't have means? they are readily available and low cost parts

https://www.digikey.com/en/products/detail/umw/AMS1117CD-5-0/17635255
https://www.digikey.com/en/products/detail/stmicroelectronics/STM8S003F3P6/2765682

Thank you for this! I know they're readily available and cheap, let's just say I'm not mentally prepared to make the project yet and still need more research before buying the materials.

 

If your goal is to learn about MCUs (microcontrollers) I may suggest the following options:

1) Arduino Uno
2) MSP430 Launchpad
3) STM8 Discovery

 

but the MCU will also need a programmer. if you are interested in starting with MCUs i would recommend to get a kit or something that has plenty of support. one easy to start option is to use an Arduino, and there are shields wht have 7-segments displays and buttons. software is free and no programmer is needed

 

You can replace the STM8S003F3P6 but it will not work. It is a microcontroller and needs to be programmed.

Hello again, I just wanted to know how do I program the STM8S003F3P6, if I happen to buy a new one?

 

If you want to learn how to program an STM8 MCU, the best place to start is by becoming familiar with the STM ecosystem.
You begin my acquiring the STM8 Discovery board and follow the instructions on how to get started with their IDE (integrated development environment).

 

Hello again, I just wanted to know how do I program the STM8S003F3P6, if I happen to buy a new one?

OMG, you have a long road ahead of you.

It can be a fun road but remember, things seem simple when you don't understand them. There are years of engineering experience in just that simple sensor.

 

As spook says, it is a long road ahead.

However, I would say that usually somethings look complicated when you don't understand them. But the time and effort required to learn how to program an MCU should not be taken lightly.

I would say that it takes 3 to 12 months of learning and practice to be comfortable at programming. Then another 5 years or more to become really good at it.

Welcome to the wonderful and rewarding world of learning how to develop and apply embedded systems!

 

https://www.st.com/en/development-tools/stm8-programmers.html

 

You don't truly understand something until it seems obvious to you. I would tell the OP, it's like an onion, many layers that all will make you want to cry. until it's done.

 

We don't know the level of experience the TS has. However, one would begin with some lessons in the following areas:

1. Basic electricity and magnetism
2. Ohm's Law
3. Basic electronic devices and circuits
4. Boolean algebra
5. Logic circuits
6. Computer architecture and machine language
7. Concepts of Structured Programming
8. Programming in C or other HLL (high level language)

As you can see, the list is already quite long even though I may have intentionally or unintentionally omitted some areas. It would take at minimum three to five years of study at a college or university to acquire knowledge and experience in these areas.

I am not saying it cannot be done as a hobbyist. I am simply saying that electronics and computers cover a very vast ocean of knowledge and if you want to swim in it then you need to get your toes wet at some point.

 

Hi Guys, I use the w1209 on my egg incubators and have purchased a lot to get a few that work. Those that dont work are missing components and or poorly soldered. You can return the non working boards, but often it is more costly to post them than what you get refunded. I am trying to get some made by professional company and have found two schematics on the web, which seem to be incomplete. Been looking for schematic over last couple of years and have not found any others. There are over 36000 videos on setting and wiring up the W1209 boards. When they work are very good and have no reason to use anything else. Have a picture of Board and schematic of layout that shows some components where the display is on the board. Have taken components off a board and there are none under the display. The two other schematics dont show these components. Have been learning kicad and have a schematic based on two schematics I have found, minus the components shown as being under or where the display is. Am a beginner in electronics so have little idea of layouts and pcbs. Does anyone know of where I might find a full schematic for W1209 boards please?