electronic systems processing 0.0 / 5 ? Design & Technology: ElectronicscircuitsGCSENone Created by: thecarkid92Created on: 03-04-20 13:03 72546138 Across 1. the stream of pulses produced are oscillating and constant. one cycle is the time (t) a single pulse takes to go from 0 (off) to 1 (on) and back to 0. the speed of the pulses is know as the frequency and measured in hertz (Hz). (7, 6) 5. buzzers and speakers produce sound. buzzers normally give out a set frequency meaning they are good for system alerts. speakers have a broader frequency range and are used for speech and audio. (6, 10) 8. a microcontroller IC is known as a peripheral interface controller (PIC). these programmable ICs are very adaptable. they can be programmed to perform multiple processes. this reduces the amount of components needed to perform a task. (15, 2) Down 2. the single pulse produced is triggered by a switch or sensor. the length of the pulse can be varied by changing the delay time. monostable devices are used for timing how long events occur such as an automatic door opening and shutting. (10, 6) 3. PICs can be programmed to count up and down, and can take over the roles of many traditional ICs. popular counters include the decade counter (4017) which has 10 outputs and counts up or down one on each pulse. (8) 4. timing, counting, amplifying and comparing (4, 2, 1, 7) 6. a PICs functions are controlled by a program or code that is received via a download cable. specialist software enables the program graphically as a flowchart. it can also be written in a coding language such as BASIC. (11, 1, 3) 7. also known as microchips, ICs are capable of performing specific tasks. there are many different types of IC. a programmable IC is called a micro controller. ICs come in all different shapes and sizes. most come in dual in line (DIL) package. (10, 7, 2)
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