超声波测距电路原理ZT

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市长家的

这是国外的几个超声波测距电路，供大家参考！

SRF04 - Ultrasonic Range Finder.

Voltage - 5v only required

Current - 30mA Typ. 50mA Max.

Frequency - 40KHz

Max Range - 3 m

Min Range - 3 cm

Sensitivity - Detect 3cm diameter broom handle at > 2 m

Input Trigger - 10uS Min. TTL level pulse

Echo Pulse - Positive TTL level signal, width proportional to range.

Small Size - 43mm x 20mm x 17mm height

Low Cost

?2.99

Purchase

Timing & Connection Diagrams

SRF08 - High Performance Ultrasonic Range Finder.

SRF08 Specification

Voltage - 5v only required

Current - 15mA Typ. 3mA Standby.

Frequency - 40KHz

Range - 3cm -6m.

Max Analogue Gain - Variable 94 to 1025 in 32 steps.

Connection - Standard I2C Bus.

Light Sensor - Front Facing light sensor.

Timing - Fully timed echo, freeing host controller of task.

Echo - Multiple echo - keeps looking after first echo.

Units - Range reported in uS, mm or inches.

Small Size - 43mm x 20mm x 17mm height.

Full Technical Data and a little History

Example programs for

Atom, BS2 Stamp, BX-24 and OOPic

to get you up and running quickly.

ANN Mode,

for use with Neural Networks

Price

?5.50

Purchase

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