Can you please explain what path the current flows in the attached schematic?
1. I would like to know for positive and negative cycles.
2. I would like to know the input voltage at the transformer and the output voltage at the input of the regulator during the full A/C period if possible. ( I have seen examples online of a bridge rectifier showing how the input A/C signal waveform is and what the output after it has been rectified which would help me understand better )
3. I am not sure why C1 and C2 have such a large capacitance value as my searching online show that the input and output filter capacitance is generally .1uF for a 7805 Regulator? ( my diagram is showing 22uF capacitor at the output and 4000uF at the input it seems to me? )
4. I think it would make more sense to use 4 diodes as a bridge rectifier, then a filter capacitor for the input to the regulator.... is this circuit a cheaply made one or is this common? )
This is from an older 1980's hand spin wheel balancer and I wanted to know if I needed to change out the capacitors because of their age, but the output to the regulator is showing 5.06 Vdc so it looks to be working ok?
I did notice that there was a .037 Vac ripple measured with a multimeter when I place the negative lead to a metal part on the machine and to a ground pin on an IC. ( i.e. the Ground pin on the IC and "ground" on the machine )
I also noticed that there was a .037 Vac ripple measured on the IC's positive pin. ( is this ripple insignificant and or normal or is this a result of a bad capacitor not filtering out the A/C ? )
Sorry for all the questions, I appreciate any help you can lend me.
Thank You for your time.
- joe
1. I would like to know for positive and negative cycles.
2. I would like to know the input voltage at the transformer and the output voltage at the input of the regulator during the full A/C period if possible. ( I have seen examples online of a bridge rectifier showing how the input A/C signal waveform is and what the output after it has been rectified which would help me understand better )
3. I am not sure why C1 and C2 have such a large capacitance value as my searching online show that the input and output filter capacitance is generally .1uF for a 7805 Regulator? ( my diagram is showing 22uF capacitor at the output and 4000uF at the input it seems to me? )
4. I think it would make more sense to use 4 diodes as a bridge rectifier, then a filter capacitor for the input to the regulator.... is this circuit a cheaply made one or is this common? )
This is from an older 1980's hand spin wheel balancer and I wanted to know if I needed to change out the capacitors because of their age, but the output to the regulator is showing 5.06 Vdc so it looks to be working ok?
I did notice that there was a .037 Vac ripple measured with a multimeter when I place the negative lead to a metal part on the machine and to a ground pin on an IC. ( i.e. the Ground pin on the IC and "ground" on the machine )
I also noticed that there was a .037 Vac ripple measured on the IC's positive pin. ( is this ripple insignificant and or normal or is this a result of a bad capacitor not filtering out the A/C ? )
Sorry for all the questions, I appreciate any help you can lend me.
Thank You for your time.
- joe
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