Posts Tagged potentiometer

ATmega 128 Programming

Looking for a experienced ATmega Programmer. Must be able to code in C or Assembler in AVR Studio 4
I want to create a 16 Step Sequencer

Analog 1 is connected to a 100K Potentiometer to variable the speed running thru all 16 steps
Analog 2 to 17 is connected to a 100K Potentiometer which creates the Value of Digital out PIN 16 to 32
Digital PIN 0 to 16 is connected to a LED to show which Channel is active
Digital 16 to 32 will be then connected to a MAXIM DS1804-100 Digital Potentiometer (which connected then to a 40106 Schmitt Trigger generating a Sinus Wave)
Crystal will be a 16MHz
This is a private Project with low budget. Will write a good reference for your CV if requested.
When succefull, i have more Projects (one more is already planed including 7 segment and 16 segment stuff)

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Competition Grade Xbox 360 Controller

I am a professional gamer who competes on the Xbox 360. Me and my team attend tournaments all over the world for thousands of dollars in prizes.

The project Ive been working on is developing a competitive gaming controller designed for the Xbox 360. Ive done a lot of initial research but have hit a few snags which I was hoping you could help on, then was also looking to have the prototype manufactured and set to a point where I can mass-manufacture it.


Switches (For Face Buttons, Possibly Triggers)

I looked into it, these are what is used in competition grade keyboards at the moment and they seem like they would serve the purpose for a controller as well. Unsure as to whether putting these into a controller, which is much smaller than a keyboard, is feasible though.


I want to have a setup for the triggers where they can be removed and replaced, similar to the triggers on a paintball gun. Ideally this would be able to make an effect of having a hairtrigger (where just a tiny amount of force is enough to hit the switch, firing the gun in game) or to allow for a longer trigger pull if that is what the player prefers. If this isnt possible/feasible then the trigger needs to default be set up as a hair-trigger. In the current Xbox 360 controller a potentiometer is used which goes from 0 to 100, at which point the gun fires. Ideally Id like to replace this with a switch, so that the response time is much quicker.


Here is the part which has been used in every controller since the Sony Playstation:

The cap on top has changed, but the joystick part has remained the same. It is just 2 potentiometers which send directions back to the console. This is where Ive had a lot of issues as to how the part can be improved while keeping costs down. The stick isnt bad at all but it doesnt move as smoothly as it needs to for competitive play, and there is a large "Dead Zone" in the center of the controller before the controller sends readings, making it hard to make finesse adjustments.

Plastic/Form Factor

Im not sure how to go about this part of the process, and research didnt turn up much. Id like it to closely resemble the form factor of the current Xbox 360 controller.


Im admittedly new to all this and while I have a ton of knowledge on the end product and its use competitively, I really dont know much about the manufacturing/engineering aspects of it all. Ive researched it enough so that Im not a complete idiot on the subject, but I need to know more and connect with people who can help make my vision a reality.

Let me know if you need more information.
Date and budget are flexible.

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Temperature Fan Controller With Sleep Mode

We need a circuit designed that will allow us to control 3, 12vdc, 4 wire PWM fans using a minimum of 20KHz frequency. If needed, sample fans will be supplied for testing. The circuit must have a thermistor to allow temperature sensing, a potentiometer to set a minimum fan speed, another potentiometer to set low temperature at which to allow the control to shut the fans off until another potentiometer setting for the temperature that will again actuate the fans.

The circuit should allow a LED to illuminate when power is connected similar to the LED on DVD players and the like. Upon powering on, that LED (presumed RED in color) will turn off and another LED (presumed GREEN) will illuminate. The GREEN LED will continue to be illuminated during sleep mode but flashing intermittently to indicate it is in fact in sleep mode.

It will also be required of the system to remember its settings and resume its last operation after an unplanned or accidental power outage.

The circuit should be able to be manufactured using as many surface devices as possible, although if using a PIC micro controller that device would be socketed.

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