Hi there,
I have just built a microphone trigger cct using a trusty old LMC555 (very low power) running from a +5V (LM2905-5) regulator from a 9V battery.
My output pulse is 100ms long and I have used a simple series divider, namely 820 Ω and 2k2 Ω to translate the 5V output to 3.2V for a 3rd party device. I am not sure what front end electronics my 3rd party device has (guessing hi input Z) but I was wondering if a chip (IC buffer) exists which can also translate 5V to 3.3V rather than using a series divider? The reason being that when the pulse is off, the path to ground via the 555 is only through 820 Ω. Now I could increase these values (say 5 fold) but then this tends to attenuate the output amplitude.
Thanks.
I have just built a microphone trigger cct using a trusty old LMC555 (very low power) running from a +5V (LM2905-5) regulator from a 9V battery.
My output pulse is 100ms long and I have used a simple series divider, namely 820 Ω and 2k2 Ω to translate the 5V output to 3.2V for a 3rd party device. I am not sure what front end electronics my 3rd party device has (guessing hi input Z) but I was wondering if a chip (IC buffer) exists which can also translate 5V to 3.3V rather than using a series divider? The reason being that when the pulse is off, the path to ground via the 555 is only through 820 Ω. Now I could increase these values (say 5 fold) but then this tends to attenuate the output amplitude.
Thanks.