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We ship promptly, but we do not have control over shipping times for international orders.
We regret that we are unable to ship orders directly to some countries, including BRAZIL, SPAIN, TAIWAN, and INDIA.
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Stemma Press is proud to offer two excellent books on plant breeding.
Please do not order if your shipping address is in Brazil, Spain, Taiwan, or India.
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V2 2 Board Diagram — Creality
Below is a component-level diagram in text/table form, followed by a labeled ASCII block diagram. ┌─────────────────────────────────────────────────────────────────────────────┐ │ USB-B Port │ SD Card Slot │ EXP3 (CR-Touch) │ RESET Button │ ├───────────────┴────────────────┴──────────────────┴─────────────────────────┤ │ │ │ [STM32F103 / GD32F303] (Main MCU – under heatsink in some versions) │ │ │ │ ┌──────────┐ ┌──────────┐ ┌──────────┐ ┌──────────┐ │ │ │ X Driver│ │ Y Driver│ │ Z Driver│ │ E Driver │ (TMC2208/2225) │ │ │ (TMC) │ │ (TMC) │ │ (TMC) │ │ (TMC) │ │ │ └──────────┘ └──────────┘ └──────────┘ └──────────┘ │ │ │ │ [Hotend Fan (CN15)] [Parts Fan (CN14)] [Heater Out (Hotend)] [Heatbed Out] │ │ │ ┌─────────────────────────────────────────────────────────────────────┐ │ │ │ DC Power Input (24V – 2-pin screw terminal) │ Power Switch │ │ │ └─────────────────────────────────────────────────────────────────────┘ │ └─────────────────────────────────────────────────────────────────────────────┘ 2. Key Connectors & Pinout Table | Label on PCB | Function | Pin Details (Signal / Voltage) | Notes | |--------------|----------|--------------------------------|-------| | X / Y / Z / E | Stepper motor output | 4-pin JST-XHP: 1B, 1A, 2A, 2B | 24V, max ~1.5A (TMC2208 limit) | | CN15 | Hotend heatsink fan | 2-pin (24V always-on when hotend >50°C) | Controlled by MOSFET, not by G-code | | CN14 | Parts cooling fan | 2-pin (24V PWM-controlled) | FAN0 pin on MCU | | HE0 | Hotend heater cartridge | 2-pin screw terminal (24V, 40W) | PWM via MOSFET Q3 | | HB | Heated bed output | 2-pin screw terminal (24V, ~220W) | PWM via MOSFET Q2 (large terminal) | | TH0 | Hotend thermistor | 2-pin (100k NTC 3950) | Analog input (PA0 on STM32) | | THB | Bed thermistor | 2-pin (100k NTC 3950) | Analog input (PA1) | | 24V IN | Power input | 2-pin screw terminal (24V DC) | Max 15A recommended | | USB | Serial communication | USB-B (5V, TX/RX) | CH340G USB-to-serial chip | | EXP1 / EXP2 | LCD display (DWIN) | 10-pin ribbon cable | For Ender 3 V2 original LCD | | EXP3 | Probe port (BLTouch / CR-Touch) | 5-pin (GND, VCC, PA4, PB0, PB1) | 5V logic, servo output on PB0 | | RESET | Reset MCU | Push button | Short to GND resets STM32 | | JST XH | Filament runout sensor | 2-pin (Signal + GND) | PC14 (active low) | 3. Probe Port (EXP3) Pinout for BLTouch / CR-Touch This is critical for auto-bed leveling.
The Creality V2.2 (also labeled V2.4.2 on some revisions) is a 32-bit silent mainboard based on the STM32F103 or GD32F303 ARM Cortex-M3 processor. Unlike its predecessors (v1.1.x with A4988 drivers), the V2.2 integrates TMC2208 or TMC2225 stepper drivers in standalone mode for quiet operation. Creality V2 2 Board Diagram
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Breeding for Quantitative Traits in Plants
3rd Edition
Rex Bernardo
Professor and Endowed Chair in Corn Breeding and Genetics
University of Minnesota
Hardbound, 422 pages, 65 tables, 75 figures
ISBN 978-0-9720724-3-4
Publication Year 2020
US$98
Most of the economically important traits in crops are quantitative and are controlled by many genes. Breeding for Quantitative Traits in Plants investigates the application of quantitative genetics to plant breeding. This book is an ideal text for a graduate-level course and a useful reference for practicing plant breeders.
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Table of Contents and Sample Pages
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