The long exposure modified TouCam Pro II camera may show signs of unacceptable noise in the pictures for exposures of over 30s or so. In order to combat this effect the CCD chip may be cooled. The cooling device I used was a Peltier module. A second hand device was obtained from eBay at a bargain price of £9. 99 + £1. 99 P&P. Since new these can c
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ost over £40. 00 I was quite pleased. The supplier I used, Terry Potts has told me that he usually has a supply of Peltiers in stock. Terry also supplies Silver Compound for all thermal surface mating which I used in this project. Terry can be contacted by e-mail at: The CCD chip has to be removed from the printed circuit board of the camera, and placed on the `Cold Finger` assembly which is thermally coupled to the Peltier module. Initial testing of just the Peltier module held against a PC heatsink and fan arrangement gave me a reading of +35C on the hot side and +2C on the cold. Not bad considering I simply used pressure to keep the Peltier against the heatsink and no heatsink compound (it does get better). A gap of 1mm is allowed around the perimeter of the peltier module. The internal cut-out of 42mm x 46mm is also made in the enclosure. This allows the Peltier module to be seated directly onto the heatsink. The self-tap screws are also insulated from the enclosure by M3 insulators. Here is a picture of the inside of the enclosure showing the four M3 insulators. The screw fixings with the nylon nuts are for the `Cold Finger` to Peltier fixing later. The grommet is to allow the fan wiring access to the enclosure. The heatsink and fan assembly were then attached to the enclosure using four self-tap screws. The Peltier module was placed on the heatsink, with some heatsink compound between them, and temporarily held in...
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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