The problem with both of these is physics, not the limits of technology...
Light is a particulate wave, consisting of particles known as photons. These particles are essentially massless and, at their maximum velocity, travel at 299,792,458 meters per second. That's 983,571,056 feet or 56,778.8746 MILES every single second. To put it another way, a single photon, traveling at the speed of light would circle the earth more than two times at the equator in under a second.
Think about driving in a car, the faster you go, the harder it is to stop. The same is true of photons and other particles. Deriving from Einstein's Special Relativity, it can be shown that to counteract the speed of light (The very thing necessary for a deluminator to work) would require an essentially infinite amount of energy...even assuming that photons are nearly massless.
The comes the issue of the force to counteract the photons' forward momentum. Only electromagnetism and gravity would have any real effect. (Strong nuclear and weak nuclear are being ruled out of the 4 fundamental forces for their traditional lack of attractive/repulsive capabilities) A controllable electromagnetic force powerful enough to control subatomic particles would require a designated powerplant. That's why all particle accelerators have one...and they generally only have to move a handful of particle at once, not the billions of trillions of particles involved in snuffing out all light.
That leaves gravity. Gravity is a force caused by the warping of space by an object, that's strength is directly proportional to the object's mass. However, even massive objects, like the sun (864,327 Miles in diameter and 4,384,818,030,000,000,000,000,000,000,000 lbs) can only slightly divert light from a given trajectory. What you need then is to compress a massive object so much that it reaches its Schwarzschild radius. The Schwarzschild radius is the radius that you would have to compress an object such that the combination of such a high mass in such a small space causes the deformation of space around the object to make the escape velocity of that object equal to the speed of light. Beyond the Schwarzschild radius, you have black holes...the thing needed for your deluminator.
So, using some rough calculations, for an object to have a Schwarzschild radius of a Golden Snitch, the lightest it could possibly be would be somewhere on the order of 52,683,426,000,000,000,000,000,000 lbs...or MORE THAT FOUR TIMES THE MASS OF THE EARTH.
Not exactly something you could fit in your pocket. No amount of technology will change that. Physics, it's the law.
...and to quickly address the issue of flying, even if the snitch didn't weigh 4 times as much as the Earth, the issue would be the surface area of the wings being prohibitively large in order to support a battery operated, electronic snitch. (as it seems you want to do with talk of "chips") This isn't impossible, just not feasible...at least until new forms of batteries, actuators, sensors, and control systems are developed...most of which have no other practical applications, and considering the development costs would be in the billions to trillions seems unlikely enough to call impossible...especially for a $50-$150 toy!
Class dismissed.
-Nick
PS: Time travel is actually EXTREMELY easy from a theoretical standpoint. This stuff is IMPOSSIBLE.