Input during test:
Voltage 12.2V
Current 1A
Test picture as well as LTspice simulation with waveform results is below.
This portion of my circuit is giving me trouble. When I have only this connected on my breadboard the Vinput (input to fixed 5V regulator) drops to 1.7V. In the LTspice simulation when going from 12.2V input to 13.8V back to 12.2V this Vinput after voltage division is a minimum of 6.6V as expected. Interestingly enough when I disconnect the voltage divider from the regulator Vinput becomes 6.6V as expected. Why does this happen when the LM1117 is connected?
When I go straight from the power supply to the LM1117 (skipping the voltage divider) I get the expected 5V output so the LM1117 seems to be functioning.
View attachment 282495
View attachment 282494
View attachment 282493
Voltage 12.2V
Current 1A
Test picture as well as LTspice simulation with waveform results is below.
This portion of my circuit is giving me trouble. When I have only this connected on my breadboard the Vinput (input to fixed 5V regulator) drops to 1.7V. In the LTspice simulation when going from 12.2V input to 13.8V back to 12.2V this Vinput after voltage division is a minimum of 6.6V as expected. Interestingly enough when I disconnect the voltage divider from the regulator Vinput becomes 6.6V as expected. Why does this happen when the LM1117 is connected?
When I go straight from the power supply to the LM1117 (skipping the voltage divider) I get the expected 5V output so the LM1117 seems to be functioning.
View attachment 282495
View attachment 282494
View attachment 282493