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 few ...

Colloidal quantum dots (CQDs) combine quantum size effect tuning with the practical advantages of solution processing. Quantum size effect tuning allows the energy bandgap and absorption onset of CQDs ...

In this section we shall discuss the interface between a photosensor and its associated electronics. There are really just two photocell applications – light measurement, and the reception of ...

Linear Technology’s Glen Brisebois, winner of an EDN Innovation award for best contributed article, noticed my JFET blog post and was nice enough to send along a note and some circuits he likes for ...

Panasonic's new Lumix DMC-GF5 incorporates the newly developed 12.1-megapixel Live MOS sensor which features high sensitivity signal processing. Both photodiode circuit and readout circuit are also ...

Imec, the nanoelectronics and digital technologies research hub, has announced the successful integration of a pinned photodiode structure into thin-film image sensors. With the addition of a ...

With a 4k1 collector resistor and 16mA drive into the led, the chosen (read ‘cheapest on ebay’) 6N135 is supposed to beat 1.5μs for both turn on and turn off, with typical figures of 90ns and 800ns.