I have a 555 Timer IC, when I check the continuity using a multimeter of the pins 1 and 8 I found the continuity (shorted) and also I observed continuity between other pins. Does it mean that the IC is damaged?
Probably. Or it could mean that you have a short circuit elsewhere on the circuit board - if it is mounted on a circuit board. Get another one and try again
I have a 555 Timer IC, when I check the continuity using a multimeter of the pins 1 and 8 I found the continuity (shorted) and also I observed continuity between other pins. Does it mean that the IC is damaged?
hi,
Your multi meter has an internal battery which it uses as a current source when measuring resistance.
When you try to measure a semiconductor device like a 555, the battery voltage at the ends of the test probes is high enough to turn on parts of the internal circuit of the 555, so you will get 'resistance' readings.
If pins 1 and 8 show a short circuit, as Simon suggests , the 555 could be damaged.
Testing with the 555 wired into a circuit can give confusing readings.
I have disconnected the 555 timer IC entirely from the circuit board and tested it, still it shows short. I think the IC is damaged, I will try with another one.
I have brought two new 555 timer ICs but still they are showing short in some pins, why is this happening? i am unable to understand. could somebody please help me?
I do not know how it is working, i have just gone ahead building the circuit with the new 555 timer ics and found the circuit working even with the pins showing short with multimeter as i have mentioned above.
I do not know how it is working, i have just gone ahead building the circuit with the new 555 timer ics and found the circuit working even with the pins showing short with multimeter as i have mentioned above.
Just now I found out with my friend that it is a defective multimeter and gives continuity test (buzzer sound) because of some problem with slots where you insert the probes (I did not really shown interest to understand the exact reason). Thank you for your replies.