Methods to Make A straightforward Dub Siren From A Circuit Bent Keychain

In the earlier publish we established what a Dub Siren was. Now it is time to make one and start the journey to become a Legendary Dub All-Star.

First you want the parts:

8 Sound Keychain - available here in packages of 12 for $9.50 plus delivery! There is plenty of different sound generating circuits on the market which are low-cost and in the next few days I'll do a keychain roundup. There can also be a COB (Chip-on-board ) version of this sound generator without the button traces that can be quite a bit easier to work with. This particular keychain just sounds so good, its received your sirens and machineguns, which everyone instantly acknowledges as being Atari like or 8-bit, plus it loops! Rotary Switch - this will be the sound selector. Eight position is ideal, nonetheless 12 place ones appear to be most common and are the cheapest from Jameco. That is what all of the sound buttons might be wired to and the middle pin shall be going to a push button that may trigger the sound by finishing the circuit with the bottom. 1 Mega Ohm Linear Potentiometer - to manage the pitch of the sound being performed back. Obviously the sound circuit has to have a pitch resistor, most low-cost keychains do. Lets try to persist with simply Jameco for the supply. 2 Momentary Push Button Switches - One button will join the ground to the rotary swap and the opposite one will probably be used as a Mute by sending positive output from the instrument jack to the Women's Spider Gwen Amazing Print Long Sleeve Tee Shirt ground. Jameco once again. AA or AAA Battery holder - Mine was from the Saw III sampler toy, you'll be able to improvise as long as you don’t go above 3 Volts. Jameco has a superb deal on these. Plastic Enclosure - Plenty to choose from, however I would suggest reusing one thing and serving to to maintain the trash out of the landfill. A Cigar box would do nicely.

 

Output Jack - 1/4 inch seems to be the trade standard.

Rasta Graphics for the front panel - free on the internet. 2 Knobs - tons to select from and scavenge if you'll be able to, otherwise get some chicken heads from Jameco.

Rubber toes - so the Rasta Box doesn’t slide off that table when the Bass is bumping.

Strong Core wire - stranded core can be a ache to work with, it splinters too simple. The entire for elements must be underneath $20 and probably even cheaper in case you are resourceful and might strip elements from discarded electronics, etc. The construction course of: Get all the pieces collectively in a single place on a work floor in a properly lit and properly ventilated environment. 1. Connect the battery compartment to the eight sound keychain board. ( In all probability finest to keep the batteries out for now, so there are not any shorts ) No want for power swap because this particular keychain powers down mechanically and immediately comes ON when the any button is pressed. 2. Solder the output jack to the place the speaker was linked on the sound board. One wire to the Transistor Buffer and the other to the constructive terminal? I dunno looks as if that’s how that they had it. Normally you'd join the ground to the surface ring of the instrument jack and the Constructive output to the tip. Three. Remove the pitch resistor and exchange it with a 1M potentiometer. Center and one of the outer taps ought to go to the place the resistor legs was. Essential, connect the remaining exterior tap to Ground, it will provde the low pitch drop! Four. This step is probably probably the most tricky and simple to mess up, solder 8 wires to the button connection traces. These are very thin traces that interlock and if you construct a solder bridge the sound might be caught within the ON position. Will probably be laborious and the only factor I can suggest is that you just calmly sand or scrape the inexperienced protecting layer and presumably reduce the traces that go to Ground from those buttons. Solder with caution and watch out not to drag arduous on the wire because the complete hint could come off. At this level you may in all probability plug within the batteries and take a look at the soldering job making sure that in case you connect the bottom to any of the button wires the sound will get produced. If the soldering checks out, drench that thing in sizzling glue so nothing moves or falls off! 5. Take a break then drill some holes for the controls in your plastic box. Ensure the knobs are spaced such that there plenty of room for them to rotate. After that it's best to overlay the graphic after which cut the holes on paper for the controls to slide through. To hold the paper in place I simply use packing tape, however there are different plastic sheets and laminate choices if you want to get fancy with it. 6. Mount the push buttons, the potentiometer, and the rotary swap in the case whether it is huge enough to work inside. In any other case solder wires to the parts first after which mount them. Please be aware that there might be more solder lugs on the rotary than button contacts. I sometimes simply use each different one the primary round. The set off button must have a wire going from the center faucet of the rotary switch to certainly one of its legs. The opposite leg needs to be linked to Ground. The Mute button will have to be related to the tip of the output jack with the second leg going to Ground as properly. The potentiometer ought to just should be wired to the bottom. In case you are intelligent you may make all the bottom connections meet at the same place saving on wire. Mount the output jack and test all the things. Makes sound? No…try setting the potentiometer to middle and maybe resetting the batteries. Nonetheless no? Return and recheck your connections. 7. If every thing works, use copious quantities of sizzling glue to hold stuff in place. Shut the enclosure and start jamming out. The sinestro t-shirt gate change should chop up the sound when pressed, doesn’t get much easier than that. Subsequent plug this into a delay pedal, turn up some Dub Reggae on YouTube, and begin Toasting! The one thing to be careful for is overusing these sounds because they eventually lose the magic. Nonetheless the primary 30 minutes will be a pure blast! Enjoy. P.S. Here is the rough schematic of the circuit with the keychain board in the middle, word the purple Xs, these are to point that in case you are soldering to the pads be certain they don't seem to be connected to some other pads via Ground. I can submit a picture of exactly what I’m speaking about soon.