lilimike
Member
Hi,
I have a circuit composed of a PIC operating at 5V, a 2 stages OP-AMP(LM833) and a comparator (LM393) both operating at 9V. both are driven by 7805 and 7809 respectively.
When I measure the current at the main input of my circuit (12V DC adapter) I get 23.4mA.
When I measure the current at the output of 7809 I get 4.8mA
When I measure the current at the output of 7805 I get 5.27mA
I conclude that my circuit excluding the regulators consumes 10.07mA (4.8 + 5.27)
Since I get 23.4mA at the main input and my circuit consumes 10.07mA is it right to say that my two regulators are consuming 13.33mA (23.4 - 10.07) ?
Mike
I have a circuit composed of a PIC operating at 5V, a 2 stages OP-AMP(LM833) and a comparator (LM393) both operating at 9V. both are driven by 7805 and 7809 respectively.
When I measure the current at the main input of my circuit (12V DC adapter) I get 23.4mA.
When I measure the current at the output of 7809 I get 4.8mA
When I measure the current at the output of 7805 I get 5.27mA
I conclude that my circuit excluding the regulators consumes 10.07mA (4.8 + 5.27)
Since I get 23.4mA at the main input and my circuit consumes 10.07mA is it right to say that my two regulators are consuming 13.33mA (23.4 - 10.07) ?
Mike