Digital Logic Probe by IC TTL 7414
This entry was posted on Monday, August 6th, 2007 at 8:01 pm and is filed under Digital, circuit com.
This circuit is quite useful for displaying the states of digital lines. The two 330R resistors may need to be changed as the circuit I generally use is using a tri-colour LED(3 legs) with common cathode. Other LED’s may need more or less current.
| Input | Output |
| 0 | Green |
| 1 | Red |
| Nothing | No LED |
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