A
Anonymous
Feb 20, 2026
Rating: 4/5
Good but needs adapter
Board is great, just remember you need a USB-TTL adapter to program it.
Description
STC15W408AS Core Board TTSOP20 - 22 years of focus on electronic components
Reviews
Attributes
| Brand | - |
| Category | Electronic Components / Maker DIY / Development Boards & Control Boards |
| Origin | - |
| Microcontroller Model | STC15W408AS |
| Package Type | TTSOP20 |
| Operating Voltage | 3.3V - 5.5V |
| Max Clock Speed | 35MHz |
| Flash Memory | 8KB |
| SRAM Size | 256 Bytes |
| GPIO Count | 15 |
| Programming Interface | UART / TTL |
| PCB Dimensions | 25mm x 15mm |
| Net Weight | 2 grams |
5 reviews
A
Anonymous
Feb 12, 2026
Rating: 4/5
Compact design
Small footprint fits well in tight spaces. Soldering pads are accessible.
A
Anonymous
Feb 12, 2026
Rating: 5/5
Stable performance
Low power and stable clock source. Ideal for sensor nodes.
A
Anonymous
Jan 27, 2026
Rating: 5/5
Perfect for learning
Used this for my embedded systems class. Very forgiving for beginners.
A
Anonymous
Jan 20, 2026
Rating: 5/5
Excellent minimal board
Works perfectly for my 51 projects. The pinout is standard and easy to breadboard.
5 FAQ
Q: Pinout diagram?
A: Please check the product description images for pinout.
Q: Which compiler?
A: Keil C51 or SDCC are commonly used.
Q: Bulk discount?
A: Contact customer service for orders over 50 units.
Q: Is USB cable included?
A: No, please purchase a USB to TTL adapter separately.
Q: Supports 3.3V?
A: Yes, it operates within 3.3V to 5.5V range.
![[Youxin Electronics] Soil Moisture Meter Detection Module, Soil Moisture Sensor for Intelligent Robot Cars](https://www.gosteppe.com/cache/medium/product/3877/legacy-main-eca7a3fa750966e5dca86bbf.webp)
![[Puzhong Brand Store] 51 Microcontroller Learning Board Development Board Jiangxie Tech STC89C52 DIY Kit](https://www.gosteppe.com/cache/medium/product/1885/legacy-main-0474e8371f211cc54ab452b5.webp)
![[Corrosion-Resistant] DFRobot Capacitive Soil Moisture Sensor Module Dry/Wet Detection](https://www.gosteppe.com/cache/medium/product/3259/legacy-main-2f0d3454b36b32391d263648.webp)
