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RISC-V for $4.30 USD? Sounds like they'd sell like hotcakes... NodeMCU ESP32-C3S_KIt Specifications: Wireless module – AI Thinker ESP32-C3S (footprint compati
by NortySpock 5y ago
RISC-V for $4.30 USD? Sounds like they'd sell like hotcakes...
NodeMCU ESP32-C3S_KIt
Specifications:
Wireless module – AI Thinker ESP32-C3S (footprint compatible with ESP32-S / ESP32-WROOM-32D) with ESP32-C3 RISC-V processor @ 160 MHz, 2.4 GHz WiFi, Bluetooth 5.0 LE, 4MB flash, on-board PCB antenna, and IPEX connector (which may be soldered or not).
USB – Micro USB port for power and programming via CH340C USB to TTL chip
Expansion – 2x 15-pin headers with GPIO, SPI, UART, ADC, I2S, 3.3V, GND
Misc – RGB LED, Reset key, user-programmable key
Dimensions – 49 x 26 mm
- tyingq 5y agoI'd add 400kb SRAM to the spec list. Full data sheet: https://www.espressif.com/sites/default/files/documentation/esp32-c3_datasheet_en.pdf https://www.espressif.com/sites/default/files/documentation/...
- conk 5y agoWhen did ESP 32 switch to RISC-V? Are there any comparisons on how the change impacts performance?
- snuxoll 5y agoThere’s no “switch” (yet), the C3 is their new MCU with a RISC-V core, but they will be continuing to manufacture their Xtensa-based designs for some time.
- tzs 5y agoThey didn't switch to RISC-V. The added RISC-V. Their recent releases have been a mix: September 2019: ESP32-S2. Single core Xtensa LX7. November 2020: ESP32-C3. Single core RISC-V. December 2020: ESP32-S3. Dual core Xtensa LX7. April 2021: ESP32-C6: Single core RISC-V.
- MrBuddyCasino 5y agoDidn't know the differences between the original ESP32 and the ESP32-S3, so I looked it up. The ESP32-S3 is basically an updated version. Major differences: Xtensa® dual-core 32-bit LX6 vs LX7 (better FPU I think?) BR/EDR + Bluetooth LE v4.2 vs Bluetooth LE v5.0 SRAM 520 vs 512 ROM 448 vs 384 USB OTG none vs 1 Plus some minor differences in the peripherals.
- eurasiantiger 5y agoLook at the solder joints. How can they mass produce hand-soldered PCBs at that price? X marks the spot.
- IfOnlyYouKnew 5y agoSlave labor.
- numpad0 5y agoOr could be super low commodity prices.
- qbasic_forever 5y agoThrough-hole components like headers can be soldered by selective solder machines, for example: https://www.youtube.com/watch?v=2sm_qdeconI https://www.youtube.com/watch?v=2sm_qdeconI or https://www.youtube.com/watch?v=oaJ67KUOHiYhttps://www.youtube.com/watch?v=oaJ67KUOHiY https://www.youtube.com/watch?v=oaJ67KUOHiYhttps://www.youtu... They use a little 'fountain' of molten solder that's controlled by cnc to touch each component and solder it in place.
- eurasiantiger 5y agoThe solder joints pictured are all rough enough to have been hand soldered by a beginner, though.
- qbasic_forever 5y agoMost of these cheap boards are sold with the headers not soldered on.
- eurasiantiger 5y agoMy comment was about all solder joints, not just the headers.
- 5y ago