| Part Number: | R93-SRF04 |
| Price: | $29.50 (USD) |
This ultrasonic ranger has an approximate range of 3 cm to 3 m. This ranger has a logic line used to trigger a pulse and the echo is returned on a second line. Minimal power requirements and a compact, self contained design make this a versatile range finder.
Manufactured By - Devantech Ltd (Robot Electronics)
There are a couple of requirements for the input trigger and output pulse generated by the ranger. The input line should be held low (logic 0) and then brought high for a minimum of 10 µS. The pulse is generated on the falling edge of the input trigger. The ranger's receive circuitry is held in a short blanking interval of 100 µS to avoid noise from the initial ping and then it is enabled to listen for the echo. The echo line is low until the receive circuitry is enabled. Once the receive circuitry is enabled, the falling edge of the echo line signals either an echo detection or the timeoute (if no object echo is detected).
| Specifications | |
|---|---|
| Voltage | 5 V |
| Current | 30 mA typcially 50 mA maximum |
| Frequency | 40 kHz |
| Min Range | 3 cm (1.18 in) |
| Max Range | 3 m (9.84 ft) |
| Input Trigger | 10 µS minimum, TTL level pulse |
| Echo Pulse | Positive TTL level signal, proportional to range |
| Weight | 11.33 gm (0.4 oz) |
| Sensitivity | Detect a 3 cm (1.18 in) diameter stick at > 2 m (6.56 ft) |
| Connection Type | Digital |