In order to help his friend prepare for a talk at DEFCON this weekend, [Craig] built an IR photodiode amplifier circuit. The circuit extended the detection range of the hack from a few inches to a … ...

In the circuit, the voltage at pin 3 is set by VR1 so as to keep the output high in a particular light level. The high output keeps the LED off. The PN Photodiode act as the light sensor. When the ...

Figure 4 shows the equivalent circuit of the photodiode in Figure 1, Figure 2, and Figure 3. 1 For most photodiodes, ... To illustrate their usage, consider a rain-sensor application example.

Large-area photodiodes present higher input capacitance, which may require the design of compensation circuits, and environmental considerations include the ability to maintain acceptable ...

Image sensor in general is composed of three basic parts, (1) a light-sensing photodiode, (2) a signal charge transfer device (CTD) and (3) the image information processing unit.

Hamamatsu Photonics introduces a new Photonic Integrated Circuit (Photo IC), P13567-02CT, with applications as an optical moisture detector. This sensor integrates an InGaAs PIN photodiode and a LED ...

Each pixel contained one photodiode. When exposed to test images and color patterns, the array reconstructed accurate color information with over 95 percent uniformity across pixels. They also tested ...