Thanks for clicking, I recently started as an EE apprentice in the UK and I hope to become an active member of AAC.
I'm hoping to get information that will help me complete my first project, the problem is a relatively simple circuit design with some added ambition.
There's currently a mechanical counter on the production line at my workplace, every time a product moves over a switch, it pushes the counter up by 1. It's very simple, so that the shift leaders can keep track of how many units are passing that point over the shift.
This counter is old and faulty, so my project is to make a digital counter.
Diagram attached:
The 'counter' is obviously the 5 pin unit in the middle of my diagram, which will be mounted in a steel box with buttons.
After reading the diagram supplied with the digital counter, I drew up my own circuit. It seems simple to me but I don't have the knowledge yet to progress.
Problem 1: Resistance.
To get a blue backlight, the counter requires a 9v supply. The counter itself uses 1.3-1.5v supply which is why I decided that resistors are needed.
I decided that a 9v supply could be used, as seen in the diagram. The value of the resistors after my first attempt at the maths came to be 1m and 5m, however I don't know if this is correct, all I know is that the resistance needs to happen before the power reaches pin 2.
Partsim.com helped very little, by confirming that this would give me 1.5v where I need it.
Testing the circuit with these (4 pin) resistors basically shorted my battery in a flat second.
If you can give me a schoolboy lesson on getting this bit right, you will be helping me a great amount.
Problem 2: Transistor.
On the supplied diagram there are transistors (as seen on my diagram) coming from pin 3 and 4 (4 isn't needed).
I'm not sure how to interpret this, so I'm here on AAC to learn how to overcome this lack of knowledge and hope there's somebody who can kick me down the river with this project.
I hope this information is enough!! Please ask me any questions, and all suggestions will be appreciated.
Thanks in advance, Liam.
I'm hoping to get information that will help me complete my first project, the problem is a relatively simple circuit design with some added ambition.
There's currently a mechanical counter on the production line at my workplace, every time a product moves over a switch, it pushes the counter up by 1. It's very simple, so that the shift leaders can keep track of how many units are passing that point over the shift.
This counter is old and faulty, so my project is to make a digital counter.
Diagram attached:
The 'counter' is obviously the 5 pin unit in the middle of my diagram, which will be mounted in a steel box with buttons.
After reading the diagram supplied with the digital counter, I drew up my own circuit. It seems simple to me but I don't have the knowledge yet to progress.
Problem 1: Resistance.
To get a blue backlight, the counter requires a 9v supply. The counter itself uses 1.3-1.5v supply which is why I decided that resistors are needed.
I decided that a 9v supply could be used, as seen in the diagram. The value of the resistors after my first attempt at the maths came to be 1m and 5m, however I don't know if this is correct, all I know is that the resistance needs to happen before the power reaches pin 2.
Partsim.com helped very little, by confirming that this would give me 1.5v where I need it.
Testing the circuit with these (4 pin) resistors basically shorted my battery in a flat second.
If you can give me a schoolboy lesson on getting this bit right, you will be helping me a great amount.
Problem 2: Transistor.
On the supplied diagram there are transistors (as seen on my diagram) coming from pin 3 and 4 (4 isn't needed).
I'm not sure how to interpret this, so I'm here on AAC to learn how to overcome this lack of knowledge and hope there's somebody who can kick me down the river with this project.
I hope this information is enough!! Please ask me any questions, and all suggestions will be appreciated.
Thanks in advance, Liam.