The aim of this project is to create a setup to capture the image of a falling object or any object in motion at a precise time using a DSLR and Arduino microcontroller. It can be done in many different ways, but the method I tried is illustrated below. Figure 1: Schematic of the setup The idea is, when the object falling or moving blocks the ligh
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t source from reaching light sensor the camera and/or the external flash unit is triggered. An Arduino Uno microcontroller board is used to measure the sensor values and send trigger signal to the camera/flash. With the microcontroller you can change the threshold value of the light sensor value and add precise dealy to the trigger signal. Here the light source is a simple laser pointer is used as a light source and a cadmium sulphide photocell acts as a light sensor. The wiring diagram is shown below, Figure 2: Wiring diagram for the Arduino board A bit of explanation on how this circuit works. The photocells or the Light Dependent Resistors (LDR) have a high resistance when there is no light, equivalent to open circuit. When light is shine on them their resistance reduces. The value of the resistance depends on how bright the light is. Initially when the light source is pointed to the LDR, it has a low resistance. The LDR and the resitor R1 act as a voltage divider circuit. The voltage drop across R1 is measured by the analog input terminal of the Arduino board. Ideally would have almost no resistance (0 ohms) when a bright light is focused on it. Which means the voltage drop measured across R1 would be ~5V. But depending on the intensity of the light source and the distance from the LDR, the LDR will have some low resistance value and hence the voltage across R1 (measured at A0 terminal) will be less than 5V. When 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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