I have a microprocessor controlled radio project that needs a brownout detector so I can save the Band and Frequency information into EEPROM when the power is turned off or fails. The power supply is 18VDC and the microprocessor runs on 5V with 3.3V I/O levels. What I need is a detector that will send a high (+3.3) signal to the microprocessor when the 18V supply falls below about 13V-14V so it will have enough time to save the information.
The attached schematic is my attempt to make that detector. Will this work as described?
The attached schematic is my attempt to make that detector. Will this work as described?
Attachments
-
60.3 KB Views: 26