charging and discharging capacitors.

Projects General Guidance
1

so im attempting to make a basic charge and discharge circuit for a capacitor.

im trying to have 1 button do the charging while holding. then the other button to discharge to something else i can read.

i tried doing it in the schematic but i just confused myself big time.

i looked at some schematics and tried replicating it but it didnt work.

for this example i was working with 25v 100uF. i want to try and observe the capacitor charging with a resistor of 10k so in the serial window i can slowly see the voltage go back up to show the capacitor is filling up. power source is 5v arduino uno.

IMG_20151212_033509551[1].jpg

2

The switch in your drawing is wrong. The common needs to connect to the C. Connect the ADC input across the C under test.

Your program could have the N/C connected to the discharge and once the relay operates, start reading the value.

Weedpharma

3

...im afraid i dont understand what you mean by common..could you elaborate on this?

also i dont think i have a Analog to digital converter...is there a bypass?

4

Common is the point on a switch that can be connected to one of the other of the two other connections depending on the physical state of the switch.
This sort of switch is known as a single pole change over switch.

If you have an Arduino you have an analogue to digital converter, if you do not have an Arduino what are you doing posting here?

5

because i didnt know arduino had a built in ADC and i wasnt aware that one was even needed let alone exists. look at my post count im still a noob here lol.

heres the thing im not using a switch im just using simple buttons that came with the starter kit for the arduous.

6

Your original drawing showed only one switch not two.
What to have another go at the drawing and explain exactly what you want to do and what you want the Arduino to do.

7

Buttons, what are you calling a button?
Do you mean a push button switch :wink:

8

yes a push button switch. the schematics isnt complete because i forgot to mention i have no idea how it would even look so i kind of gave up on the second button. first button is to charge the capacitors then the next button is to release the charge to something that i can read for testing.

9

Do you have a plan for when you press both buttons together?

Paul

10

Grieva:
yes a push button switch. the schematics isnt complete because i forgot to mention i have no idea how it would even look so i kind of gave up on the second button. first button is to charge the capacitors then the next button is to release the charge to something that i can read for testing.

Here:-
Charge discharge.jpg