- #1
gphil5
- 4
- 0
Hello all,
I've breadboarded a simple astable multivibrator to generate 38kHz (identical to http://upload.wikimedia.org/wikipedia/commons/6/6a/Transistor_Multivibrator.svg) using 2N3904s.
Upon power up, it's a solid 38Khz. After 60 seconds, it's drifted up to ~44Khz... and stabilizes to ~52Khz after several more minutes. I've yet to see this drift mentioned on the multitude of astable multivibrator documents I've read, and was curious if this was common, expected, or if there is something I can do to minimize the drift I'm experiencing.
Thanks in advance.
Phil
I've breadboarded a simple astable multivibrator to generate 38kHz (identical to http://upload.wikimedia.org/wikipedia/commons/6/6a/Transistor_Multivibrator.svg) using 2N3904s.
Upon power up, it's a solid 38Khz. After 60 seconds, it's drifted up to ~44Khz... and stabilizes to ~52Khz after several more minutes. I've yet to see this drift mentioned on the multitude of astable multivibrator documents I've read, and was curious if this was common, expected, or if there is something I can do to minimize the drift I'm experiencing.
Thanks in advance.
Phil