Model Rocketry Launch Controller

thingiverse

This is a model rocket launch controller designed around the Kobalt 24v MAX line of power tool batteries. The battery simply snaps into place at the bottom, just like it would in any power tool. This design may work with other batteries, but I specifically created it for use with the Kobalt 24v MAX batteries. My finished design features a master power switch and a safety interlock feature. Both push button switches must be pressed simultaneously to launch the rocket safely. The first button will also light up an LED indicator and sound a loud buzzer/alarm, giving you clear feedback that everything is ready for liftoff. This model consists of four separate pieces, which can be easily assembled and customized using the included Fusion 360 .f3d file. Although this design is fully functional at present, I consider it to be a work in progress. I plan on making improvements to the wire-wrap portion to make it more robust and durable. About 15 feet of wire will be added to the wire spool, which will then be pushed inside a hole and secured with an overhand knot to prevent it from coming loose. The end of the wire spool will feature alligator clips for easy connection to the rocket igniter. The hardware used in this design is M3, ensuring a secure fit. Indentations are provided on each piece where nuts are required, making assembly easier and preventing them from slipping out during tightening. Make sure to use electronics that can handle 24v power. Here's a list of the specific components I used: 1. A durable piezo electronic buzzer/alarm with a continuous sound output of 95db. 2. A momentary push button switch for easy activation and deactivation. 3. A LED indicator lamp for clear visual feedback. 4. An ON/OFF toggle switch with protection cover to prevent accidental activation. You can find these components on the following websites: 1. https://www.aliexpress.com/item/Best-Price-10Pcs-Durable-3-24V-Piezo-Electronic-Buzzer-Alarm-95DB-Continuous-Sound-Beeper-For-Arduino/ 2. https://www.aliexpress.com/item/momentary-push-button-switch-R13-507-OFF-ON/ 3. https://www.aliexpress.com/item/5PCS-LED-Indicator-lamp-AD16-22-pilot-lamp-22mm-mounting-size-electrical-lamp-12V/ 4. https://www.aliexpress.com/item/ON-OFF-Toggle-Switch-with-protection-cover/ This design is compatible with the type of battery shown below: https://www.lowes.com/pd/Kobalt-2-Pack-24-volt-Max-Lithium-Power-Tool-Battery/1000616187