Comments

Author Comment Last activity Moderation
david_uwi " spectrometer16f.gcb.txt " | Read more » almost 2 years ago
david_uwi " SPEC2018-2-.bmp This is the circuit diagram " | Read more » about 3 years ago
david_uwi " Problem I have is that sucrose solution looks colorless so does not absorb visible light. I feel that the changes in absorbance that you are seein..." | Read more » over 4 years ago
david_uwi "Finally got something working using the ic-Haus LFL1402 diode array. https://www.ichaus.de/iC-LFL1402 I normally use 3 V (2xAA bateries) so I had t..." | Read more » over 4 years ago
david_uwi "I've found that the clock timing with the Toshiba arrays is not quite as rigorous as suggested in the datasheet (I've only tried it with the TCD110..." | Read more » almost 5 years ago
david_uwi "There's something strange about your "spectrum" it seems to run green,yellow,pink,blue,green. Seems like there are several overlapping color patter..." | Read more » almost 5 years ago
david_uwi "Update: The diode array has gone from obsolete to unobtainable in a matter of a few months. I am testing an ILI1402 (made by ic Haus) which is supp..." | Read more » about 5 years ago
david_uwi "Sadly the diode array has also gone from "end of life" to obsolete to unobtainable. I'm getting the same problem with my design https://publiclab.o..." | Read more » about 5 years ago
david_uwi "I finally got round to making the Raman spectrometer. I first tried at right angles and as you found I got nothing. So I went for the transmission ..." | Read more » over 6 years ago
david_uwi "Yes I have no problem with that. It is however more involved than other projects I see on this site. It needs a lot of fine soldering (maybe a PCB..." | Read more » over 6 years ago
david_uwi "The display uses SPI communication (it has an internal ILI9341 driver). The PIC16F1788 has a hardware SPI module. These type of TFT displays can be..." | Read more » over 6 years ago
david_uwi "Here's a real spectrum which I stored on the SD card. It is of potassium permanganate. Because there is a very strong absorbance 500-580 nm and the..." | Read more » over 6 years ago
david_uwi "It uses a TSL1402 diode array (I got mine from digikey) it has 256 pixels. A holgraphic diffraction grating (1000 lines) plastic lenses x2 (3 cm fo..." | Read more » over 6 years ago
david_uwi "Thanks for the detailed explanation. I've seen that back scatter is a popular cofiguration what do you think? you are getting the same axis as tran..." | Read more » almost 7 years ago
david_uwi "I am going to attempt a Raman spectrometer. As I am in the design stages I was wondering why you chose "transmission" I am tempted to monitor at ri..." | Read more » almost 7 years ago