Uploaded February 2024 | Updated September 2026, 47 minutes ago
This one is a smaller, TO-39-packaged PNP transistor. It is designed for consumer and industrial line-operated applications.
It has a similar silicon die as the 2N3439 NPN transistor.
Join my YouTube membership: youtube.com/channel/UCKp1MzuAceJnDqAvsZl_46g/join
For more pictures, visit my website:
https://curiousscientist.tech/silicon-dies
This one is a smaller, TO-39-packaged PNP transistor. It is designed for consumer and industrial line-operated applications.
It has a similar silicon die as the 2N3439 NPN transistor.
Join my YouTube membership: youtube.com/channel/UCKp1MzuAceJnDqAvsZl_46g/join
For more pictures, visit my website:
https://curiousscientist.tech/silicon-dies





![10-channel thermistor-based temperature logger with display and SD card
Check out PCBWays website for rapid prototyping of printed circuit boards, CNC and 3D printing services and many more! https://www.pcbway.com/activity/anniversary9sales.html?invite=482140
In this video, I show you how I built my own 10-channel thermistor-based voltage logger. The project uses a high-performance STM32F401 microcontroller, an 1.8 TFT LCD with an SD card slot, a button and my custom-designed PCB.
I will need to measure temperatures at multiple points in my upcoming projects, so I decided to design a board and write some code for a decent temperature logger.
Note: The array in line 258 should be temperatureValues[i]. I accidentally wrote the wrong array because of my previous project where I used a similar code.
Join my channel membership: https://www.youtube.com/channel/UCKp1MzuAceJnDqAvsZl_46g/join
Affiliate links:
10k NTC thermistor probe - metal capsule: https://s.click.aliexpress.com/e/_DFRHELj
10k NTC thermistor probe - thin: https://s.click.aliexpress.com/e/_DFMbitT
STM32F401CCU6: https://s.click.aliexpress.com/e/_A2A5iO
ST-LINK V2 programmer: https://s.click.aliexpress.com/e/_DkXh4rH
1.8” TFT Display: https://s.click.aliexpress.com/e/_A4946K
Read the relevant article on my website:
https://curiousscientist.tech/blog/10-channel-thermistor-voltage-logger
Get my PCB from PCBWay:
https://www.pcbway.com/project/shareproject/10_channel_NTC_thermistor_based_temperature_logger_b1c5cdfe.html
Get the relevant parts using my affiliate links:
https://curiousscientist.tech/tools 10-channel thermistor-based temperature logger with display and SD card](https://i.ytimg.com/vi/KHx-e6o9D6o/mqdefault.jpg)




