Detect Reflective Surfaces with a GP2S700HCP from Sharp Corporation

Finding out whether things are nearby is a classic engineering problem – OEMSecrets already introduced you to a wide range of possibilities. Now, Sharp sends a classic optoreflective system into the fray.

From a technical point of view, the part is quite simple. It combines a IR diode and a phototransistor in a single housing. In addition to that, a raisin cover is placed above the assembly to minimize the impact caused by ambient visible light.

The internal schematic of the GP2S700HCP could not be easier

Actual range of the sensor is quite difficult to ascertain – the datasheet limits itself to stating “Optimal Sensing Distance : 3mm”, but also mentions that the part has an extraordinarily large range for this product class.

This is also reflected in the opto-electrical properties. The forward voltage of the infrared diode is said to be between 1.2 and 1.4 Volts when a current of 20mA flows. Absolute maximum current is in the range of 50mA, which – obviously – also leads to a higher detection range.

Physical placement, on the other hand, is simple. Our figure shows the two “eyes” of the part next to one another, with surface mount soldering points at the bottom providing electrical access to required signals.

The two lenses are placed on an SMD carrier

Recent Articles
Reduced Web Prices from Future Electronics
For this week only, take advantage of reduced web prices on select parts  2213831-1  LUMAWISE 80 mm Base Assembly SR Module Accessory 1-776200-1  Header Assy, 23... Read Article
Types of electronic circuits discussed
There are many other interesting elements to electronic and circuits is top on my list. While this topic can quite complicated, it is nevertheless possible to... Read Article
New Renesas Industrial Ethernet Module R-IN32M3 Solution Kit
Register to win a solution kit! The R-IN32M3 Industrial Ethernet Module is a ready-to-use, certified hardware and software solution based on Renesas technology and quality standards.... Read Article
The Hitchhiker’s Guide to PCB Design
Want to create a solid, manufacturable PCB the first time? Get the only eBook you will ever need to upgrade your PCB knowledge and launch your... Read Article
Secure your supply with Future Electronics
Find what you need faster Hundreds of thousands of components. Three strategically-located Distribution Centers. ONE global IT infrastructure. Find what you need faster with access anywhere,... Read Article
Save 10% on Orders $500 or More
Promo code is valid for saving 10% on orders of $500 or more. Offer does not apply to products from Adafruit, DEEPWAVE DIGITAL, FTDI Chip, NVIDIA,... Read Article