DIY Arduino Nano Electronic Load V2

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DIY Arduino Nano Electronic Load V2
Hello everyone! This is the version 2 of my elecronic DC load based on Arduino Nano, this is a simple and powerfull electronic DC load up to 70W, in this version I'm using 1.8 inch ST7735 tft display instead of 2x20 lcd display that I used in version 1, so now I'm able to display more information on the display, in this version I've also used INA219 current sensor instead of ACS712 the 5A version, now the current measurement has higher resolution, the voltage is also measured by the INA219 with high accuracy, on the older version I was using a voltage divider for voltage measurement, it does the job but is not accurate enaough. In my opinion this is a much better version othe electronic load.
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Опубликовано:

29 сен 2024

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Комментарии : 40

@rompipelotas Месяц назад

very very good circuit !!!! thanks a lot friend.....congratulation !! I will modify your circuit with an ina226 and with three bigger power to247 mosfets to get to have 10a as maximum current

@SSCchannel 24 дня назад

If I want to make a tool like that with high power, can I just add mosfets in parallel?

@JB-20 4 дня назад

As always, great project!!!

@MrStingerjack 7 месяцев назад

Congratulation, good job. Your electronic load is a big update. I like your desing idea really much. The Display is the biggest Update, the old disply was too old school but now everything is fine now. You are using a hall effect sensor to measure the current, thas a good idea but i think to measure the current directly from the shunt resistors with a percision op-amp would be a good option. Finally you made it again, great projekt. I hope we see more from your engineering skils of DIY. Big thumbs Up.

@HMProjects 7 месяцев назад

Thank you for your kind words. Yes, I could be a good option to use a op-amp if you dont have a current sensor, it's easy to implement that but the hard thing is to write the correct code in order to measure the current correctly and most important precisely, and then comes the question, why to complicate things?, because INA219 is not hall effect sensor, it is a high-side current and power monitor IC, basically it does the same thing, for current measurement it's using a precision op-amp to measure the voltage drop across the shunt resistor, on V1 I used ACS712 wich is a hall effect sensor, anyways by using INA219 with a few lines in the code we can easily display voltage, current and power with quite high precision, and by selecting the desired full-scale current range to 400mA we can measure down to 0.1mA and at 3.2A full-scale we can measure down to 0.7mA, I think is more than enough to have such a resolution for this tipe of project.

@erikr007 3 месяца назад

What transistors did you use for power dissipation ie. Q2 and Q4 in your schematic?

@doooddemo 7 месяцев назад

I’m also making a USB tester now, only the firmware is much better, there is auto-detection of protocols, all sorts of triggers, memory cells, etc.

@bakulpatel2862 7 дней назад

thanks for sharing 🙏🙏🙏

@robertmolina4359 3 месяца назад

Hola, ¿el PR2 de 5k es lineal o logarítmico? Could you make one with more than 5 amps with the TFT screen? Thank you.

@HMProjects 3 месяца назад

The potentiometer that I used is linear, and to answer to your second question, unfortunately I do not have the time for that, I barely have time to work on my next project.

@temyraverdana6421 7 месяцев назад

An amazing project. Thanks a lot for share your work

@HMProjects 7 месяцев назад

You're welcome! 🙂

@robertmolina4359 3 месяца назад

Amazing project, I like the TFT screen. It appears (error I could not create the program) when opening the sketch in Arduino IDE, could you help me? I think it is damaged, could you upload it again? Thank you very much.

@HMProjects 3 месяца назад

I don't think that the sketch is damaged, is more likely that Arduino IDE itself to have a problem that causes that error, try to reinstall the program.

@robertmolina4359 3 месяца назад

@@HMProjects I renamed the sketch .ino according to what chat gpt told me and it was fixed

@mobilesurgerybd 7 месяцев назад

Dear sir how to make T210 soldering station?

@HMProjects 7 месяцев назад

I will probably make a video about it in the near future.

@mobilesurgerybd 7 месяцев назад

@@HMProjects i waiting for your next Videos

@Stefanev 7 месяцев назад

You are very good and make beautiful project! THANKS FROM ROMANIA! 😊

@HMProjects 7 месяцев назад

Și eu îți mulțumesc! 🙂

@ngotoi266 2 месяца назад

I'm a tattoo artist, I really like your power supply, it's great that it can be replaced with an up and down button with 2 separate channel voltage storage.

@HMProjects 2 месяца назад

This is not a power supply, is a electronic load.