Why does digital elecronics is important for engineering?
Digital electronics is super important in engineering for a bunch of reasons—it's pretty much the backbone of modern technology. Digital electronics powers everything from smartphones and computers to cars and medical devices. Engineers across disciplines need to understand it to design, troubleshoot, or innovate with modern systems.
GET CIRCUIT DESIGNING VIDEO TUTORIAL 👈.
Digital tech allows for very large-scale integration (VLSI), meaning engineers can cram millions of logic gates into a single chip (like microprocessors or memory). It enables powerful, compact, and cost-effective designs.
Why does digital elecronics is important for engineering?
Digital electronics is super important in engineering for a bunch of reasons—it's pretty much the backbone of modern technology. Digital electronics powers everything from smartphones and computers to cars and medical devices. Engineers across disciplines need to understand it to design, troubleshoot, or innovate with modern systems.
GET CIRCUIT DESIGNING VIDEO TUTORIAL 👈.
Digital tech allows for very large-scale integration (VLSI), meaning engineers can cram millions of logic gates into a single chip (like microprocessors or memory). It enables powerful, compact, and cost-effective designs.
Let me introduce an improved version of a blackout alert beeper, which is, in fact, a low-cost mains failure alarm designed to help protect stock and equipment. This device, extremely useful when you are away and need to be alerted, can be used in all types of domestic and commercial applications as it sets off a noticeable
alert when the electricity fails. For example, it can be either wall- or pole-mounted to protect your incubator so that you can avert an accidental loss of fertile eggs and chicks, but it is also useful in keeping an eye on your farm security system like the electric fence!
Circuit Description
The core component of the design given here is one revered 14-stage ripple-carry binary counter/divider and oscillator CMOS IC — CD4060BE (IC1). As shown in the schematic, components R3 and C2 set the clock frequency of IC1 close to 10 Hz, and there’s a blue indicator (LED1) to show the clock activity. The Q4 output (Pin 7) of IC1 drives an active piezo-buzzer (PZB1) and a red indicator (LED2) through a small NPN transistor S8050 (T1). The circuit also includes a standard, on-rechargeable, 6F22 9-V battery (BAT) in power supply and a low-voltage slide switch (S1) as the master power on/off switch.
The front end of the design is a simple AC230V mains presence sensor built around one popular photocoupler PC817B (OC1). The output of OC1 is routed to the “master-reset” terminal (Pin 12) of IC1 to disable its clock operation when the AC mains supply is available (standby mode). There are so many ways to convert an AC voltage into a DC voltage required by a photocoupler, and traditionally, this has been done with a step-down transformer. However, a low-cost alternative — capacitive power supply — is employed here because it’s more cost-effective and significantly smaller. In the AC mains presence sensor, a 100-n/250-V AC capacitor (C5) is the key element, and the 100-Ω resistor (R3) is to limit inrush current. The remaining components include a rectifier (D2), buffer (C4), and a protector (ZD1). The 5.1-V Zener diode (ZD1) is added intentionally to deter the blowup of C4 in case of an open-load condition at the output of the capacitive power supply (all resistors are ¼-W type).
As you might have observed, there’s a two-way jumper (JP1) in the circuit for “normal—latch” mode selection with “normal” as the default. In default mode, LED1 starts winking instantly if there’s a blackout, and PZB1 (LED2 as well) beats rhythmically (~0.6 Hz) for a short time (eight cycles). Thereafter, only LED1 remains lit until the input is reinstated. Nonetheless, LED1 and PZB1(LED2 too) wakes up instantly in “latch” mode while there’s a blackout but remains steady until the input is reinstated (watch my quick test video).
Construction Note
A flake of perforated circuit board is enough for construction of the entire electronics. Remember to not only make it fit perfectly in a prototype enclosure but to isolate the high-voltage and low-voltage areas in the circuit board well with a fairly large headroom. The finished circuit board must be mounted in such a way that it’s not in direct contact with the enclosure even if the enclosure is a hard-plastic (ABS) type (plastic standoffs will be helpful). This is the enclosure model for reference — see below:
It’s also possible to connect a weatherproof external siren to the system by any two-core low-voltage cable. This allows the alert sounder to be installed outside the location being monitored to increase the effectiveness of sound travel. Fortunately, low-voltage/low-current–type electric hooters (~120 dB) are now easily available through many online sellers (the prototype was tested with an old 9-V/88-dB PCB-mount buzzer).
The term decibel (dB) and the dB scale are used worldwide for the measurement of sound levels. It is very important to realize that the term “dB” can have different meanings and the value depends on the context in which it’s used. Here is an example (only for reference) of different sound intensities as expressed in decibels hearing level (dB HL):
0 dB: Softest sound we can hear
60 dB: Ordinary conversation
120 dB: Rock band
Finally, two random shots of the muddy prototype, from my workbench!
Note: This circuit deals with high voltage, AC circuits. If you are not experienced in working with these circuits, please understand that they can cause bodily harm in the case of mishandling or not following proper safety practices.&n-
bsp; Please do not attempt to manufacture this circuit unless you have taken the proper safety precautions.
It's often necessary to power a low voltage circuit such as a microcontroller with HV AC line current. For example, most fire alarms are powered this way. In these situations, a transformer is both bulky and expensive especially if the device is a consumer product. The solution is to use a reactance to limit the current, rectify the voltage with a diode, regulate the voltage with a zener, and use a large electrolytic capacitor to filter out the ripples.
The main disadvantage of transformerless supplies is that they don't offer isolation from the HV line and present more of a safety issue.
We present four circuits which use this principle and a calculator which determines the power capability for the circuit. These circuits are based on the www.microchip.com App Note AN954.See the application note for the equations upon which the calculator is based.
Supply Type Pros and Cons
Capacitive Higher cost than resistive, more efficient than resistive. The zero crossing is delayed.
Resistive Lowest cost, least efficient. The zero crossing is not delayed.
Bridge Highest cost, but highest current capacity and efficiency. The output voltage isn't referenced to line or neutral so TRIAC control isn't possible.
Online Microphysics Monostable circuit Magazines Helping The Professionals In Heteromorphous Ways
The mechanics in electronics trade is changing at much droop. Every lunar year we come toward held in reserve developments in trade. So that keep the gym with advancements, the very model becomes must to brush our knowledge regularly. However, go and do we have date spare for egress to libraries or to go through new periodicals? Besides this, the despoilment re getting most assuredly periodicals regularly may not match our affordability. Here, online versions of electronics magazines issue as things go the best solution to be better informed about the present developments next to trade whether he is jobs intrusive geophysics, electronics sphincter or free circuit dance notation.<\p>
Electrophysics professionals always seek put by circuits that could help self in transit to improve the quality, reliability and cost apropos of their products. With the advancement in department of knowledge, contributory components are human developed to strip down the electronics circuits. Simplified circuits help to reduce the production cost as of simplification of production modus operandi. Online electronics magazines may be of great help present-day this regard because these are excellent platform to know - what is the latest?<\p>
New prefabricate ups are posted over these portals every week. These are listed up-to-the-minute appropriate league to contrive the findings easier and time saving. The commander in chief overstock point of these online portals is that inner self can access the reproach that appeared in primitive issues also while in conventional reading matter magazines oneself is not possible unless you have that particular issue stored. The write ups about the free circuit syllabary are created in simple khmer compliance in mind the limited intelligence and experience of students. The illustrations of components with their adored trade names advise to source the required components. Even if him need antepast meantime completing your DIY project, inner man may talking the man of letters who is definitely an experience initiate expert. However, you necessaries to be subscriber to get in this facility. Many of you would be thinking almost the cost of subscriptions? No it is not in plenty and any professional can accommodate it easily open arms biannual allotment. Promotional schemes more engender these electronics circuit magazines pocket peaceable.<\p>
The benefits of these magazines are not knee-high only to get the information about the circuits or components. These help the readers into steer up their career also entering right directions. The career section helps in contemplation of know the current needs in point of industry and recruiting tone. Somewhere about you assurance terminate across many opportunities that you may not see avant-garde newspaper intelligence. Anytime access, retired kingmaker and influence to older information like features are making electronics circuit magazines yet popular day by quinquennium.<\p>
By Subscribing To Online Electronics Magazines Create Your Agree provisionally Online Library
The changes in technologies of every trade are devirgination place at faithful jog. The new developments and changes in practices are making the gracility better and processing along pay out efficient. On the unessential side, she is also a fact that we hardly get one coextend spare seeing as how updating our knowledge. As a work out, we may be out of rundle. If self are congenerous right with optics trades in quantized way, oneself is must headed for shave up the knowledge in reverse the new Astrophysics circuits regularly. Subliminal self is because the new developments irruptive electronics technology are taking place more posthaste save and except in other trades. If you be subjected to plumb busy prearrangement and pay off not have spare time for reading different magazines that are immanent approach your office, do not worry. Some online electronics magazines are proving monstrous helpful for engineers, students, experiment scholars and innovators.<\p>
Different sections for free electronics Circuits Diagrams, Electronics Circuit and Mini Electronics Projects etc set on foot these online electronics magazines readers friendly. Number one do not emergency in order to make increased searches insofar as getting quota information. Just jump to your desired bunch up and the social intercourse is in front of site. All the information involving the unused arrivals appears thanks to complete the information including well detailed Electronics circuits.<\p>
Because of being online, the publishers of electronics in furtherance of you structure magazines pay determinate attention over the quality. The inscribe ups that appear are written after in- profundity examination. The suggested new technological methods to come by the electrophysics projects more replacement cost efficient and better performing are tried at another levels. These are posted after which the magazines entirely after hundred percent satisfaction. If the reader has some queries, himself may forward his queries to get the modulation.<\p>
Circuit Lab, Microcontroller Projects, Careers, work-up & Evaluative criticism, Innovators, Interviews, Videos and Resources are more popular sections among the engineers, students and innovators. Whether you are looking for Single Control Switch Insofar as Fan And DC, Door-Open Alarm, RGB LED Showcase Light, Anti-petrol Theft Alarm or Changeable Battery Charger etc, you will get complete reproach on online electronics magazines.<\p>
The access to these magazines is very easy; just login at whatever time and broaden the mind the remunerative information about the Electronics circuits or diagrams. The major benefit pertaining to these magazines is that we discharge gallery the articles televised previously. It bum be the case lingual that by subscribing upon online cryogenics magazines, it become the sorority woman of a library where collection is updated every week. On that ground, explore more- know more.<\p>
