To create the two laser guns for our game, we wanted to mount red lasers into some kind of modifiable toy guns that players could hold and shoot with. Fortunately, we found small red lasers from Fry`s that the target photocells can consistently successfully read as a hit, and a set of toy guns from Walmart that nicely accommodate the lasers, as we
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ll as small "vibrator motors" to provide tactile feedback for a successful hit. All wiring was done with phone cable, so one cable (surrounded by additional tubing for stress relief) runs between the console and the guns and is split into its separate wires to complete the various circuits. This is the circuit for our gun lasers. After taking apart a laser pointer, we discovered that its outer casing is wired high, and the spring inside is wired low. We soldered two wires to these two points and connected the outer casing to power. The spring is wired to the drain of an N-channel transistor and its source to ground. The gate is controlled by our C32 board. The guns came with a trigger switch already wired into them. We dismantled the switch wires and attached them to our C32 board. A resistor was used to pull down the voltage, so that when the trigger switch is open the C32 ports reads low. When the switch is closed, the circuit is complete and the C32 ports read high. Note that we added a capacitor between the C32 ports and ground because of noise from our target motors. Before this addition, the motors caused significant noise when on, resulting in our C32 ports to read false gun trigger pulls. This value of capacitance is just right - large enough to reduce the noise, but not too large as to make the response too slow. In order to add another sense for players to enjoy, we added vibrator motors to our guns. Whenever a...
This project fits more for custom made battery casing that can have more space to hide things inside. This switch with few alterations can be used for any other project as well but is designed based on e-bike needs! This project use a clever functionality of....
The circuit described here uses ultrasonic oscillations and operates based on the propagation velocity of these oscillations in the air. Thus, we can easily determine the distance of two points if the time within which the wave travels this distance is....
Sometimes the precious metals are hidden too deep and are not detected except with complicated devices. In many cases, however, small pieces of precious metal buried near the surface can be detected by relatively simple means. Everyone is very attractive to....
Many times for various reasons we forget or can not water the plants that we have in our homes. And many humidity sensors units just notify us with a beeping sound or with a flashing light, that the pot needs watering. But what if we are away from home? This....
The principle behind a metal detector is really very simple. Proof of this is the circuit that follows, in which it proves that the construction of a metal detector can be done in the minute, with few components that we find very easily everywhere. With the....
The sub-harmonic bass generator is a sound producing unit for guitars. The sound it produces looks very much like that of the bass guitar. The octave generator is sometimes quite unusual since it does not produce any of the usual ways of coloring the sound,....
In the past the sounding (sea bottom measurement) was done with the "bullet", that is, with a heavy lead object that the seamen plucked into the sea hung from a calibrated rope. As soon as the "bullet" reached the bottom, the depth appeared directly from the....
This Amplifier was designed to have the following specifications: Distortion less than 0.1% at full power of 100W even at 20KHz. Power has to be attributed to an extended bandwidth. The output transistors must be protected against short circuits. The power....
A series of LEDs serve to alert the gardener when plants need water. Using two conventional digital integrated LEDs and a series of LEDs, we make a very useful device for gardening. The device detects the amount of water in the pot and alerts the grower.....
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