So I had this LED flasher circuit with a LM3909 and a 220uf 25v capacitor powered by a D battery. I've read up on this forum about the 555 timer mod, and it made me think that I might have a simple rapid fire solution with my LED flasher.

So I researched this LM3909 and found out that if you lower the capacitor value it will give you faster flashing. After powering this unit off of a scrapped USB cable, I tried a could different capacitors, 4.7uf, 10uf and 20uf showed as a solid LED so they oscillated too fast and I assumed wouldn't do the job, and 100uf was too slow. I found a 47uf 16v capacitor laying around in some random circuit board, and it flashed very fast, so it was just what I was searching for.

Now I hooked the wires that went to the led to the top 2 leads of the trigger, and it did rapid fire fire just great, but It might have made the left analog shake a little bit because there was some minuscule movement going on, and I'm assming its probably because of my power source. The leads give off 3.8v according to my multimeter running off of usb, and I'm assuming if I power it from the usb leads on the controller it might give the same voltage, so would I need a resistor? This chip can run off of power as low as 1.5v so maybe there's a better power source on the board for this.

I'm testing it on my old matrix wireless but If this works I'm probably going to put it into my wired CL controller I just bought because the wireless controller is seriously worn out.

Besides the power where would I connect a momentary switch to make this work out? Maybe one of the leads going to the trigger?

Ok, so when i try to turbo off the top 2 contacts it doesnt let the trigger fire, and when i try to turbo off of the outside 2 it moves the right thumb stick down and right as it fires, any idea?

Wow no replies? I currently have a lm3909 timer chip, a capacitor, a resistor, and a transistor giving me rapid fire on the trigger, no interest at all?

I'm working on adding a second capacitor and 2 switches for a high auto/low auto and an on/off switch.

As far as I know a 555 timer cannot do this and is a lot more parts, and people have to spend money on professional mods or spend a little less to do a picaxe, so what do you think RDC? I'm sorry I cant take pics my phones dying and I'll put them up asap.

i onetime had my adjustable pot - touch a back point and it did what you said happened

Yup, I finished this completely, you just need to use NPN transistor, run a 180 ohm resistor off of the point furthest from the trigger to the middle of the transistor, and put the collector (to the right of the rounded side) on the pin facing the trigger, then take the ground from your led flasher circuit and put it on your middle pin.

This worked all dandy, but I decided to go a step further and make a high/low switch, I connected a 10uf and a 47uf capacitor by thier negative leads, and then ran a positive lead to the middle wire of an on off switch, and then the other 2 outside wires to each capacitor on thier positive lead.

I got the power from the headset area, if u can count the 8 leads on the headset area, find the furthest one to the right, and put your positive power lead onto it. Between this lead and the power to my led flasher, I put an on off switch as well.

I hope this was enough information, but now I have a wired CL dual mode rapid fire on the trigger pwnage controller.






180 ohm resistor fixed this problem for me. Its all trial and error.

Oh, I forgot, I used a hot glue gun to put the switches in the grey area near the rumblers, and I replaced the small rumbler with a small one from an xbox 1 controller and put it sideways.

The LM3909 is discontinued and virtually extinct. They can still be found in the secondary market but you'll pay out the nose ($10 on eBay).

Well I did search on ebay for them, and they are quite expensive, but it had it laying around from a school electronics project, and it was free for me, but having rapid fire on the trigger with this chip even from ebay could still be cheaper then the alternative picaxe of pic mods I think, and if its possible why not tell people about it right?

Comparing it to a PIC is like comparing a car to a plane, both are modes of transportation, but only one is gonna get ya over land, mountains and water, just have to learn to take off, fly and land it.

For what it costs and can do the LM3909 is a sheer waste of money compared to the 555, which ya can find almost anywhere and will do the exact same thing in this instance for a lot less, plus can be used in a ton of other useful circuits.

Free (for me) turbo on trigger(555 cant?)
No programming neccisary

I'm thinking this is just a simple go kart compared the the bells and whistles mercedes of mods, the pic. haha.

I don't have a job

The 555 can be used for R/F and doesn't have to be programmed, look in the Pinned section.

Also with the 555 timer you can add turbo/rapid fire to all your buttons, with a potentiometer you can adjust the firing/turbo rate of your buttons. Easy to adjust for Cod5 and 4. So far most of all the game I played have different sweet spots on the potentiometer. Like for Resident evil 5 you can have the speed to fast and the game will not work for professional mode unless u find the right speed.
Here is a link to the Tut I have better picture but I havn't gotten around to adding them to the tut yet.

On the trigger?

despite the fact that you're pretty much the only person who will do this, I still think it's pretty cool.

YES

Here are two tutorials for using a 555 to add rapid fire to the triggers:

Wireless 555 Rapid Fire Tutorial

Freeform 555 Rapid Fire tutorial