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Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.
I recently took up a rather ambitious project for my skill level as I have never worked with almost all involved components before.
I would be very grateful if you could help me find the best components to hopefully make this work.
What I am trying to achieve is this:
A laser beam is shining at...
I am building a setup to be able to read the reflected light from a laser beam with a photodiode, which I have never done before.
so I bought this photodiode and this transimpendance amplifier. But after wiring it up, I didnt get any useful readings from the TIA.
So I I reduced the voltage from...
Hi,
I've designed pulse oximeter circuit. When one LED lights continuously, I got perfect PPG (Photoplethysmogram) signal.
Then I measure PPG while blinking LEDS, like that:
I got stuck. There is no signal or just noise. When I removed low pass filters, I easily got my opamp saturated. I...
Hi Guys
I am working on a private project where I need to detect a blue light flashing up. But the OpAmp I am using is always on HIGH regardless of the brightness of the blue light. I have also tried various OpAmp circuits but they all resulted in the same. I've tried feedback resistors of up...
Hello there,
I want to know where I can find a SPICE model for this phtodiode regular InGaAs photodiode IG17 here is datasheet https://www.lasercomponents.com/de/?embedded=1&file=fileadmin/user_upload/home/Datasheets/lc-ingaas/ig17-series.pdf&no_cache=1 .
Thank you for understanding,
Dragos.
i have a 1981 Misubishi linear tracking turntable with photodiodes with code SP254FS. One is damaged and i am trying to source a modern equivalent. Any help would be greatly appreciated.
Thanks
Shaun
I am trying to build transconductance amplifier circuit to obtain values of the reverse biased photodiode (PD) current in order to estimate some of the LED characteristics.
At first, I have used the scheme named “Recommended Zero Biased Circuit” from page **broken link removed** (placed at the...
The photodetector is to be used to detect green light from an optical fiber (emitted by fluorecein, about 500nm). I have tried using this detector, but with no readings. This diode has a response of about 0.25 A/W at 500nm.
This is the amplifier I have used (OPA27GP):
Is there a better...
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