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19 Threads found on edaboard.com: Ultraviolet
There are (or used to be) the EPROM's that you erase by shining an ultraviolet light into a small window on the IC. Is yours similar?
If an ultraviolet print head for a curing machine has a 100W bank of leds on it supplied by a Buck converter LED driver from a 48V rail?then what extra safety precautions need taking if the rail is made to be minus 230VDC? (That?s an ?isolated-from-the-mains? -230VDC). The leds are in Buck connection, with the anode to the 0V rail, so th
Dear all, I need your help, I was looking for ultraviolet sensor (UVA-UVB) that it has serial connection or can be connected with USB. I searched a lot , but I could not find any. Please help me and tell me if you know any. I need to connect it to mikroElkronika microcontrollers. Thank you, Farah
For toner transfer you don't need ultraviolet lamp.There are plenty of videos on youtube which will guide you about "toner transfer" method. You will need a Laser Printer and glazed paper for that.
Part number suffixes The F in a name generally indicates the PICmicro uses flash memory and can be erased electronically. Conversely, a C generally means it can only be erased by exposing the die to ultraviolet light (which is only possible if a windowed package style is used). An except
ultraviolet is invisible, I guess you are talking about BLUE ... In this application I wouldn't "pair" LEDs but use separate resistors for each diode. How to select resistors? See: :wink: IanP
Hello! I did it once. In fact, the circuit I built was an ultraviolet measurement device. An UV sensor produces a current. I used a LED instead, and the behavior looks the same, so I think the easiest way would be to use the LED as a current generator and use an op-amp as a current / voltage converter. This would give you something linear.
no. solid state array's such as CMOS absorb light (visible and invisible), which is converted into photo-electrons; the charge is stored on a capacitance and then read out. Blue light through to infra red works quite well, ultraviolet doesn't work so well. You could use two motorised filters to remove each component, taking alternate images etc
"Semiconductor ultraviolet detectors" M Razeghi - Journal of Applied Physics, 1996 is a good article
For starters, light caused by welding is extremely intense. The intensity can cause the retina to be burned/destroyed. The cells are damaged by the intense light, same reason why you don't look into a laser beam. Light caused by welding contains some ultraviolet light which is harmful. So it is best to wear long sleeved shirts and pants. And of cou
How about ultraviolet or Ozone?
Few nice projects including: ultraviolet light source UV-80 for PCB exposure, PCB Etcher,Z axis accelerometer MMA1220D from Freescale,ARM7-Base development board for LPC2148 you can find here:
Hi nvha, Are you familiar with the different model types of PICs that Microchip has? For example, the 16Cxxx versions can have a window on the chip for erasing the program with an ultraviolet light source. Some versions of the 16C family are OTP or one-time-programmable. The F version chips have flash memory that can be programmed over and ov
Back around 1900 when electricity and ultraviolet radiation became well known there were all sorts of patent medical treatments using them. The reason this is not used today is that it does not work, not because it is a new idea.
You can not compare infrared sensor with ultraviolet sensor, as both have been designed to sense different frequencies. If you are looking for a UV sensor have a closer look at UV Photodiode TW30SX (link in my previous post). Regards, IanP
Anyone have any good plans for a ultraviolet eraser box? Thanks
The normal method is to use transparencies and use an ultraviolet light to transfer this to board that has photo resist layer. Very good results can be had.
I know one chemical complex that works almost like this. It works only when it is wet (but water steam in air is usually adequate) and in normal light it looks like yellow, with little "blink" or "reflex". In ultraviolet it emite green-yellow light. It is called fluoresceine, checkout some chemical books.
I need to build a circuit using Photodiode that will receive light from ultraviolet incandescent lamp (50/60 Hz line voltage), amplify and filter the signal and give dc output depending on the amplitude of the light. I'll be using an ultraviolet Photodiode for this purpose. Any help would be highly appreciated. Thanks in advance!