Based on your design you could omit some of these or potentially add more! We love how he made a barrier to protect his face but he’s okay with the gas tank being inches away from his head. Secondly, it would help us to fit everything inside the case. I seem to have connected it exactly the same way you did. If you are having trouble just revisit the Fritzing diagram and follow each wire trace. Thanks for the information! This wire then connects to the V+ terminal of the 12v lead acid battery. It also contains 5v regulation circuitry for the 5v relay board to work. I chose to make my panel out of acrylic. All connections are now made. I marked the holes for the bolts, drilled them and mounting was complete. If we put it all on one larger board it would be a difficult form factor to fit into our control module case. I went with speaker wire to bridge the connection between the binding posts and the ignitor and made them each 10 feet long to give them some distance between fireworks if so desired. It is a lot of cutting and bending wire but don't worry, after you get used to it it only takes 2+ hours. ©2020, The Discovery. The Cat 5 was much more robust and had no errors on assembly. Slide the shelf over the feet, bolt the display panel to the lid and load some batteries. Sorry if this is a bit long-winded, but I like to be as thorough as possible. GND comes back from the optocoupler board and to the 12v source's ground. I made some of these with ribbon cable but after a few defective cables I switched to some cut up Cat 5 cable I had laying around. We love how he made a barrier to protect his face but he’s okay with the … In the picture attached you will see the following: Black wire - ground from the LED inside the button housing. Your resistor on the IR LED side isn't doing anything. ... it is really a soothing DIY : ), try to improve this launcher with your ideas. and they turned out to be the perfect fit for my application. Foam BoardThere are 3 layers of foam board that make up the screen. The Arduino reads this as LOW which the code tells it that there is indeed an igniter present and once armed the system will be happy to blow up bright, shiny firework goodness! Keep them enough off the bottom that you will have room to work with future wiring and enough from the side that you will be able to fit you sealed lead acid battery in upon final assembly. Use a FET. It simply has a circuit for each button that contains a pull down resistor and connection to an Arduino digital pin for each button. My understanding is that solid state relays are either specifically AC or DC and cannot be used interchangeably. It is an easy way to create a simple custom display and I have used them in many other projects. I also snuck the node sensing wire into the crimp to simplify my wiring later on. The problem is physical. I used 10K Ohm, 1/4 watt resistors for my pull down resistors. I labeled my cables and my posts to keep any confusion away. I used Green wire to represent data. Start by soldering your 16 pin DIP sockets in place. Dump the relays. This is helpful if you are troubleshooting while away from the control box and are out near where you are setting up the show so you don't have to walk the 50' back and forth. Then I created raster shapes to etch the acrylic with the laser as to where each board went. DATA nodes are different and more tedious. There are some wires running on the bottom side of the board here that you can't see but with the Fritzing diagram it should be clear how all these are wired up. I will walk you through it below and via the annotations in the pictures. Sadly we didn't make those or know how. How ever many things you want to be able to blow up simultaneously, up to 8. Install all of the buttons, switches and potentiometers into the panel surface. All this board does is supply some parallel connections to both Vbat and 5v. Then check out this link so you can really understand what your connections on a breadboard are doing. (they "bounce" really) It is a simple failure mode that doesn't matter when controlling a light bulb, or a fan, or a pump. There are a lot of wires and it is easy to get things mixed up if you are not careful. This way when the relay is triggered the resistor will add significant resistance over and above the resistance of the Nichrome wire. Just wire it in series with ground right before the ground terminal. This part is pretty simple wiring but as with any project it gets to be a mess in a hurry. Reply Take a look through the Instructable, ask questions if you are curious and I hope you build some version of this for yourself! One path goes through a current limiting resistor (560 ohms) and connects to a red LED. It accomplishes this by using an infrared LED / photo-transistor pairing. An optocoupler is a means to communicate signals from one logic level to another with complete circuit isolation. Firework Rocket Launcher. BE CAREFUL!

On to the next steps to see how the Sensing node board goes together. I tried this modification with fuses on 10 different types of fireworks and they all lit flawlessly. 5 years ago, Thank you for the heads up. This clay provides the resistance to the explosion that ensures the firework flies up and out of the top of the tube instead of bursting out the bottom. The top left shows two pins in which the battery would plug in. You could easily make the cables another way. 2) I wanted it to be "smart" or "aware" of what connections were present. Connect ground from this as well (common ground really). So... (9v - 5v) * 0.476 A = 1.9W. The Discovery is open to the public Saturdays and Sundays. Just as we did on the firing case (ammo can) we need to cut a rectangle for the keystone jack to fit in. V+ nodes just need to all be connected together in parallel.

However I did consider FETs, but last time I checked, those that are suitable for my setup and are reasonably pirced compared to the relay modules, needs drivers to be safe (considering fast ignition and maximum current output from the AVR controller, as I want to be able to ignite ALL 32 channels or at least 16 at once, if needed). See the attached pictures for how my final setup went. Green wire - V+ from the PWM module we built earlier.

Just google series vs parallel if you don't understand the concept. I took careful measurements that such that once all buttons were mounted and the display screen was attached that there would be enough room to close the lid while still keeping the control panel sitting as high as possible. Link Comment.

You can give it a read here. Virtually all of them designed to be electronically activated with high current and Nichrome would work with my launcher. The next set is bottom middle and is a single pin, this takes the data signal from Arduino pin 22 and simply acts to pass it along to our next set of pins. This is recommended in Adafruit's NeoPixel UberGuide.

Reply We will not be using near that much in this project as we will not be setting the brightness to maximum and we will be only using one color at a time. But there is no way I am taking this thing apart for more pictures! With slow acting physical ignitors, this may not be a problem as Jon points out. What about some reasonable sized capacitors parallel to each relay outputs that will dampen short spikes?Thank you in advance :). What resistors you use is entirely dependent on what voltage drop and current you want through your LEDs. I guess I have to buy new modules, as I already have 4*8-relay-modules sitting here. I love the Opto-Isolated Songel Relays from eBay. Share it with us!

This case could be much more lenient as the is nothing to display here.

On the green wire be sure to solder a 300 - 500 ohm resistor between the wire extension and the first (#0) LED.

Another quick and boring board. Therefore the voltage on either side of the resistor is 5v and the Arduino reads that as a HIGH. Hope that helps.

Your TIL193 has a different pinout than the CNY74-4H that I used. This makes replacing spent nichrome a 5 second exercise and is really handy if you are in the middle of putting on a show. Here is the code.. again removed all unnecessary items, Reply It will be easier to wire up the component end of your buttons, switches and knobs prior to installing them in the control panel. Begin to lay out your firing case for final assembly. It would be just as easy to build this using mosfets or a different solid state technology. The whole thing needed to be large enough to read from a distance, be easily controlled from an Arduino and look professional.

GND nodes also should be wired in parallel, for this I used black wire.

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