Each tub sockets has 2 plastic nibs on the back. For each socket I drilled 2 holes into circuit material. Then I pressed the socket nibs into the drill holes. Finally I screwed the stripe of epoxy circuit material to the wood slat. The wiring diagram to drive 1 or 2 tubes is printed on the top of the magnetic ballasts (see picture no. 14). In my c
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ase every magnetic ballast is driving 2 tubes. In addition every tube needs of course its own fluorescent starter. The 4 starters in the right upper corner as well as the 2 vertically mounted magnetic ballasts are connected to the 4 top uv tubes. The 2 single starters at the right bottom as well as the horizontal mounted magnetic ballast driving the 2 lower uv tubes. To wire all parts together I used 0. 75 mm ² strand cable which I tinned at the ends. This was required as all parts had these clamp connectors (without any screws). To make the wiring look a little bit nicer I used quite some hot glue. The tubes need approx 2 seconds to ignite. You can see on the photo that one end of the tube is actually a bit brighter than the other end. However - as the board is supposed to be placed in the middle I do not expect any quality problems. Picture 6 shows actually the same but the wood was painted in black now (a bit of isopropanol and few drops of refill ink for a black Edding ® pen, as this mixture is drying very fast. Don`t forget to open the window!) The base plate will later on be covered by a white mat carton (as a kind of reflector). The side walls will stay painted in black to avoid potential light scatter. The timing device was made with a Atmel ® ATmega32 microcontroller. Picture 7 and 8 shows the prototype of the timer using an Atmel evaluation board from Pollin Elektronik ® (green board) and my own test board. My...
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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