MainPage:Nuclear:Summer2014:LEDmonitoring

Abstract

We had to design a Led circuit that would contain multiple Led, activate them by address, then holds the flashing addressed Led in memory and activates another Led to blink, allowing the circuit to have multiple flashing LEDs, in the final circuit there will be around a thousand LEDs. This massive circuit board will then be use to run experiments on about a thousand crystal samples of Lead Tungsten at the Jefferson Lab. We first look for the components that could perform these actions, so we looked at a similar circuit board at Jefferson lab to get a general idea of what we needed to look for. We also did some online research to look for components and to find alternative methods of building the circuit. We found several alternatives to making a circuit by hand, but none of them met the requirements. So, we decided to go on ahead and build the circuit based on the ideas we came up with from examining the similar circuit at Jefferson lab. Our research told us, we only needed three different components to make a circuit that would be able to address different LEDS, then remember their last state, and be able to change the frequency at which the addressed Led Would blink. Those three components are a two-input AND gate, knot or inverter, and a D flip-flop. We used 7404 also known as a hex converter, two 7408 which contains four two-input AND gates each, and two 7474 which contains two D flip-flops each. With which we were able to hook up four LEDs that were addressable, had memory, and were able to change frequency. In conclusion with three simple components we were able to create a circuit that can be attached to a controller. Then programmed to address the LEDs have them blink then control which LED is flashing and at what frequency. In the future I hope to make the program for this circuit more user friendly, so that it’s easy for the researchers to use.

References

LED Project slides media:Circuit design for LED monitoring system.pdf