Hello
I need some help. I have come up with an idea of making my own chronograph, so I can measure the bullet velocity, when I shoot a bullet out of my hunting rifle.
I am not very good at any electronic stuff, though I have made some simple circuits, like a PWM circuit (also with help some you guys).
I have searched the net and found some informations about the construction of such a device and here is what Ive found.
I make two frames 4x4 inchs, where there are four IR leds in the buttom and 4 photodiodes in the bottom. I flood both frames with IR light and the photodiodes pick up the light. When the bullet is passing through the frames it works like a switch. Although Ive learned that I must use a NAND timer to send the signal from the frames into and that then works as a switch. I havnt been able the figuere out how I must proceed.
I would like to be able to read the result on something, I have been thinking about segment blocks, but if there is an easier way, I would like to do that.
Can you please tell me how I must go on with this project?
And please, it must be as simple as it can be. But I also just want to be able to read the velocity or some result I then can do the math on and get a result.
Hope you all can help me
Best regards
Jacob Jensen (Denmark)
I need some help. I have come up with an idea of making my own chronograph, so I can measure the bullet velocity, when I shoot a bullet out of my hunting rifle.
I am not very good at any electronic stuff, though I have made some simple circuits, like a PWM circuit (also with help some you guys).
I have searched the net and found some informations about the construction of such a device and here is what Ive found.
I make two frames 4x4 inchs, where there are four IR leds in the buttom and 4 photodiodes in the bottom. I flood both frames with IR light and the photodiodes pick up the light. When the bullet is passing through the frames it works like a switch. Although Ive learned that I must use a NAND timer to send the signal from the frames into and that then works as a switch. I havnt been able the figuere out how I must proceed.
I would like to be able to read the result on something, I have been thinking about segment blocks, but if there is an easier way, I would like to do that.
Can you please tell me how I must go on with this project?
And please, it must be as simple as it can be. But I also just want to be able to read the velocity or some result I then can do the math on and get a result.
Hope you all can help me
Best regards
Jacob Jensen (Denmark)