Help
Advanced Member level 2
Hello,
I'm using rechargeable coin battery for RTC. At first this new battery comes with 4Volt but on top of battery they mark it as 3.6V. The RTC Vb requited is 3V/27uA but the new battery given extra 1V.
In between the battery and RTC Vb i tried put a higher 100K resister to reduce down the current flow. With this method i able to reduce down the voltage at Vb but still can't reduce down to 3V for RTC required. Finally i try to use a 3V zener diode to regulate down the voltage but the battery life can't be last longer. The circuit shown below:
Is there any better suggestion?
Thank you,..
I'm using rechargeable coin battery for RTC. At first this new battery comes with 4Volt but on top of battery they mark it as 3.6V. The RTC Vb requited is 3V/27uA but the new battery given extra 1V.
In between the battery and RTC Vb i tried put a higher 100K resister to reduce down the current flow. With this method i able to reduce down the voltage at Vb but still can't reduce down to 3V for RTC required. Finally i try to use a 3V zener diode to regulate down the voltage but the battery life can't be last longer. The circuit shown below:
Is there any better suggestion?
Thank you,..