| ??? 04/11/07 06:05 Read: times |
#136958 - Possible Damage / Bad Part Responding to: ???'s previous message |
It is possible that you have a bad part. Do a test where you remove the connection between the IR device and the MCU. Then see if the IR device can swing its output up and down with full logic swings. Perform this check with an o-scope.
If the part cannot even perform under this condition then check the 10K resistor and make sure that it is not shorted or some such. You did not clarify in your original posting if the output of the IR device was actually transitioning back and forth between the 4V and 3.5V in the presence of the IR signal or if it was just a DC level. If it is transitioning then that is a clue that the device is trying to work and somehow cannot drive the load that you have wired to its output pin. On the other hand if the output looks like a DC level them the device itself is probably bad. Michael Karas |
| Topic | Author | Date |
| Trouble with TSOP1738 | 01/01/70 00:00 | |
| Translate Pinning >>> | 01/01/70 00:00 | |
| PIN interpretation | 01/01/70 00:00 | |
| Possible Damage / Bad Part | 01/01/70 00:00 | |
| scope or voltmeter? | 01/01/70 00:00 | |
| Voltmeter andwith new part | 01/01/70 00:00 | |
| invalid assumption | 01/01/70 00:00 | |
| TSOP1738 | 01/01/70 00:00 | |
| ok, no need to remove it for the test I suggested | 01/01/70 00:00 | |
| Emitter 38 Khz ? | 01/01/70 00:00 | |
| Emitter generates 38Khz | 01/01/70 00:00 | |
| TSOP Solution | 01/01/70 00:00 | |
the power of observation :) | 01/01/70 00:00 |