Re: Hacking a digital camera
Removing the IR filter won't make much of a difference. The objects have to be *very* hot in order to have any appreciable IR emission at wavelengths short enough for a silicon-based camera. With a bandgap of 1.2eV or so, you aren't going to see anything with greater than 1um wavelengths. Think of how hot something has to be to glow red, and back off a little. If you have parts that hot, you won't need a camera to tell you that!
--Cheers
Tom
--
Prof. Thomas H. Lee
Allen Ctr., Rm. 205
350 Jane Stanford Way
Stanford University
Stanford, CA 94305-4070
toggle quoted message
Show quoted text
On 5/6/2022 18:13, James55 wrote:
Hi fellas, thanks for the input, it all helps.
@ Harvey;
Nicely outlined. You've helped clarify a few things which weren't so clear. The feeding a 50% duty cycle signal shall have to wait. My intention right now is to nail the technique in finding shorts by analyzing the millivolts
One more question, would be, "how might one find out if the tester has a high impedance?" There is no mention in the manual.
@ Aldue;
Yes, an infrared camera is definitely on the horizon, in fact, I do have one back in Europe.
Has anyone ever tried hacking a 'normal' digital camera by removing the IR filter lens to see if the components glow when hot? That might be my best option here.
@ Ed Breya;
I'm currently in Rio, so obviously have access to lots of LIA's... What color were you thinking?
No... apologies for being silly, but don't have access to a Lock-in Analyzer, tbh I have never heard of one. That said, I do appreciate the input and shall look further into them. My goal is ultimately to fault-find as quickly as possible, regardless of which technique or apparatus is used.
I'm still a hobbyist so still accumulating tools and testers. The reason for asking about the millivolt method in particular was that following a prior thread, it became very clear that it was something quite basic which was missing from my repair 'armory'.
Like Jim Ford however, I am intrigued as to recommended makes and models.
Appreciations to you all.
James
