| ??? 01/18/06 14:14 Read: times |
#107704 - link Responding to: ???'s previous message |
Santosh said:
i need help to build 38khz reciver and transmiter circuit for my obstacle avoidance robot. i have got tsop 1738 reciver ic. i am trying to build 38khz frequency using 555 timer please help. Maybe this is of help? http://www.the-starbearer.de/Roboter/B...IRBake.htm Santosh said:
i think our eyes cannot see infrared signals is it true. It depends on wavelength. If you have an 880nm emitter and much current is driven through it, then you can see the crytsal weakly glimming red. If you use a 935nm emitter, on the other hand, then at same current the glimming is even more weak or nearly invisible. Take care, you should not look directly into the IR-Led if high currents are flowing. Use only diffuse shining types. Kai |
| Topic | Author | Date |
| need help on building 38khz reciver | 01/01/70 00:00 | |
| wrong place | 01/01/70 00:00 | |
| Infrared is invisible to the human eye | 01/01/70 00:00 | |
| See IR | 01/01/70 00:00 | |
| Ultrasound | 01/01/70 00:00 | |
| link | 01/01/70 00:00 | |
Search on proximity sensors | 01/01/70 00:00 |