FDL-2X (Arduino) by Horbi

Last crawled date: 3 years, 1 month ago

03.02.2018 - added two new front grip designs
28.01.2018 - created and added a mount adapter for a stock/shoulder rest like this https://www.thingiverse.com/thing:2398544
This is an adaption of the famous FDL-2X Nerf gun, operated by an arduino pro mini.
Arduino is much cheaper, easier to get and easier to program for the most of us.
As there was no documentation on the pusher motor handling i have designed my own on base of a TB6612 breakout board.
All files, like the eagle PCB files and the Arduino sketch with libraries, are here: https://github.com/trilu2000/FDL-2_Arduino/
I tried to use only easy to get components for my electronics:
As for the Arduino pro mini are different versions for the voltage regulator available.
Please be aware that a charged 3S battery pack has more than 12 Volt.
I’ve got mine from here – they are good till 16Volt or so…https://de.aliexpress.com/item/5Pcs-Pro-Mini-328-Mini-5V-16M-ATMEGA328-ATMEGA328P-AU-5V-16MHz-for-Arduino-5V-16V/32829288603.html
The Display is a standard 0.96 inch, I2C, Oled display from here:https://de.aliexpress.com/item/0-96-inch-IIC-Serial-White-OLED-Display-Module-128X64-I2C-SSD1306-12864-LCD-Screen-Board/32780054633.html
but you will find it at ebay or other electronic stores as well.
Motor driver for the pusher motor is a TB6612FNG breakout board - https://www.sparkfun.com/products/14451
Or https://de.aliexpress.com/item/5PCS-Free-Shipping-Dual-Motor-Driver-1A-TB6612FNG-for-Arduino-Microcontroller-Better-than-L298N-TB6612/32696432503.html
The encoder is a standard 3 pin encoder with a push button form herehttps://de.aliexpress.com/item/20PCS-LOT-Original-Rotary-encoder-code-switch-EC11-digital-potentiometer-with-switch-5Pin-handle-length-15mm/32759410968.html
As it is a standard component and i have some more projects in mind i ordered some more :-)
For the other components I found a BOM from Jesse at the FDL-2+ thing (https://www.thingiverse.com/thing:2332045/#files)
I like to share my experiences here as I had problems to get some parts.
The most difficult part to get was the ESE-11HS1 Panasonic micro switch for the pusher motor front and back detection.
To get parts from a distributor in Germany you have to be a business customer, they are not doing any business with private customers.
Only RS has two internet portals, one for business and the other for private customers, but even then, the shipping cost in relation to the product price are too high.
After some research I ended up again at my favorite component shop – aliexpress.comhttps://de.aliexpress.com/item/20PCS-ESE11HS1-detection-switch-expansion-handle-limit-detection-switch-threading-pin/32806332500.html
Another difficult part was the pusher motor itself, but I found an alternative with the “V-TEC 12V Mini 25D DC Motor” here:https://eckstein-shop.de/V-TEC-12V-Mini-25D-DC-Motor-Gleichstrom-Getriebe-Motor-Stirnradgetriebe-770-RPM
Great shop, good value products and fast delivery
The ESC’s and brushless motors are available at hobbyking.com, all other parts like screws, cables, pin connectors, etc I found at ebay.