BIG roller blinds

thingiverse

### Note: Designed in Fusion360. Project file attached. ### !!! You can find the new version here !!! https://www.thingiverse.com/thing:4301158 ### Firmware: Best code for ESP8266 (NENA-17 + esp8266 + A4988 + mqtt) https://tasmota.github.io/docs/Blinds-and-Shutters/#using-stepper-motors If you have questions about how Tasmota software works, visit the Tasmota Discord chat room for a discussion. https://discordapp.com/invite/Ks2Kzd4 ... or other options: Code for ESP8266 (NENA-17 + esp8266 + A4988 + mqtt) https://tasmota.github.io/docs/A4988-Stepper-Motor-Controller Code for ESP8266 (NENA-17 + esp8266 + A4988 + mqtt) https://github.com/TrDA-hab/blinds Code for ESP8266 (28BYJ-48 + esp8266 + A4988 + mqtt) https://github.com/andreypopov/blinds-popov Code for ESP8266 (28BYJ-48 + esp8266 + ULN2003 + mqtt/get) https://wifi-iot.com/p/wiki/46/en/ ### BOM: NEMA-17: https://aliexpress.ru/item/32604882068.html NEMA-17 (5:1): https://aliexpress.ru/item/32586860419.html NEMA-17 (27:1): https://ru.aliexpress.com/item/32586836815.html Driver A4988: https://ru.aliexpress.com/item/1609523735.html Driver A4988 board: https://ru.aliexpress.com/item/32908836265.html 28BYJ-48 + ULN200: https://ru.aliexpress.com/item/32839767528.html DC-DC Step Down Power Supply Module, max=24V (MP1584): https://aliexpress.ru/item/32742116421.html Aluminum Capacitor (100mF, 35V): https://aliexpress.ru/item/32814611460.html ### Important information: 1. Modifying a 28BYJ-48 (12V or 5V) stepper motor from unipolar to bipolar tutorial: https://coeleveld.com/wp-content/uploads/2016/10/Modifying-a-28BYJ-48-step-motor-from-unipolar-to-bipolar.pdf 2. The diagrams show the supply voltage of the NEMA-17 stepper motor 12 volts (this is the minimum voltage). The recommended voltage is 24 ... 35 volts (respectively, the capacitor should be 35 ... 50 volts). More information about the effect of voltage on stepper motor operation can be found in the tutorial: http://stepcontrol.com/pdf/step101.pdf - for 28BYJ-48 (5v) recommended voltage is 12v (only if modifying to bipolar). - for 28BYJ-48 (12v) recommended voltage is 24v (only if modifying to bipolar). 3. Stepper drivers configuration tutorials: A4988 - https://lastminuteengineers.com/a4988-stepper-motor-driver-arduino-tutorial/ DRV8825 - https://lastminuteengineers.com/drv8825-stepper-motor-driver-arduino-tutorial/ TMC2208 - https://wiki.fysetc.com/TMC2208/