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A Brushless Motor Nerf Titan50 with CircuitPython #CircuitPython #ItsyBitsy #Nerf

cellsafemode on hackaday.io posts a Titan50 Nerf build. The device is powered by Adafruit ItsyBitsy M4 microcontroller and 14 NeoPixel smart LEDs running CircuitPython.

The motor side uses 2x 20amp blHeli esc’s (no bec’s), 2x Racerstar BR2205 2300kv CW and CCW brushless motors, and a MTD-01 brushed motor controller (dual motor controller).

Using a bulkhead mounted rheostat that is accessible on the outside.  This adjusts the speed of the ESC’s. A USB connector allows connections without taking anything off the gun to the ItsyBitsy. The ItsyBitsy kill toggle switch is mounted to the outside to kill power to the ItsyBitsy.

There is a fan in the battery compartment to cool the 6v regulator (this provides the brushed dc motor power) and mtd-01 dc brushed motor controller . There is another fan on the body facing side of the rear bottom above the ESC’s.

Added a 3d printed nerf rail to mount the lithium ion battery.

The brushless cage is a 3d printed Regulator cage (same as in my Regulator gun). This is mounted on a 3d printed plastic shelf that allows me to screw into the shaved mounting holes that the oem cage was using, and then use standoffs to mount to the brushless cage.

Next to the ItsyBitsy inside, there is a 5v switching regulator. Next to the 5v regulator, is a small power distribution board that has rails for battery + ground,  5v + ground, and digital high + digital low (for use in the switches).

There are also 4 NeoPixels mounted inside the barrel with two of them shining directly inside the barrel, the other two provide light that is visible thru the barrel vent holes.

Initial light scheme is rainbow fading the 10 (5 on each side) that are attached to the fiber optics around the barrel when no triggers are pulled and the dart door is closed.  The 4 inner led’s will be solid green.  So if the gun is pointed at you, you’d see green shining out of the barrel.

With the first trigger pressed, the inner led’s go solid yellow. The outside led’s will cascade green.

With the second trigger pressed, the inner led’s go solid red.  The outside led’s cascade red.

When the dart door is open, all the led’s go solid blue.


Stop breadboarding and soldering – start making immediately! Adafruit’s Circuit Playground is jam-packed with LEDs, sensors, buttons, alligator clip pads and more. Build projects with Circuit Playground in a few minutes with the drag-and-drop MakeCode programming site, learn computer science using the CS Discoveries class on code.org, jump into CircuitPython to learn Python and hardware together, TinyGO, or even use the Arduino IDE. Circuit Playground Express is the newest and best Circuit Playground board, with support for CircuitPython, MakeCode, and Arduino. It has a powerful processor, 10 NeoPixels, mini speaker, InfraRed receive and transmit, two buttons, a switch, 14 alligator clip pads, and lots of sensors: capacitive touch, IR proximity, temperature, light, motion and sound. A whole wide world of electronics and coding is waiting for you, and it fits in the palm of your hand.

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CircuitPython – The easiest way to program microcontrollers – CircuitPython.org


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