Homemade exposure unit

Posted on Feb 7, 2014

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

Homemade exposure unit
Click here to download the full size of the above Circuit.

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...

Leave Comment

characters left:

Related Circuits

  • New Circuits



    Popular Circuits

    Telephone Intercom
    Layout Control Mother Board
    how to design h bridge circuit for
    low noise oscillator design
    comb filter
    home telephone fm transmitter circuit
    fade fade out led circuit car interior lighting
    Spectrum 128 Keypad
    Pre mic audio amplifier with ic LM386
    Connecting the PICAXE-08 Microcontrller to other Components
    Intelligent Ultrasonic Ranging IC 4Y4 form a monolithic liquid crystal display rangefinder circuit diagram