ArtsAutosBooksBusinessEducationEntertainmentFamilyFashionFoodGamesGenderHealthHolidaysHomeHubPagesPersonal FinancePetsPoliticsReligionSportsTechnologyTravel

My Favorite Electronic Diagrams

Updated on August 28, 2017

1) Audio Power Amplifier

The following diagram is an audio power amplifier of 2x8.5W, the amplifier is stereophonic and I did a test with mp3 audio of a cell. To control the volume, I used the circuit shown below, which is a voltage divider with coupling capacitors and protection.

Hardware: IC LA4508, 2 Speakers 8 ohms, Diode DS1307, 2 Ceramic Capacitor 0.01,2 Electrolityc Capacitor 1000 uF, 2 Electrolityc Capacitor 220 uF, 2 Electrolityc Capacitor 100 uF, 2 R 160k, Ceramic Capacitor 100 nF, Ceramic Capacitor 1.5 nF, Pot 100k

Diagram
Diagram
Volume Control
Volume Control

2) VU meter

The VU meter circuit serves to observe the amplitude of an audio signal and using LEDs. Simply you have to feed the audio input and potentiometer serves to regulate the audio level LEDs.

Hardware:IC KA2284, 5 LEDs, Electrolityc Capacitor 10 uF, Electrolityc Capacitor 2.2 uF, R 56, Pot 10k

3) LDR Night Sensor

The LDR is a light sensing resistor, and when the LDR is in the presence of light, resistance is minimal. In this case the diagram is designed so that when there is no light then the LED is turned on. The residtance range and sensitivity of a photoresistor can substantially differ among dissimilar devices.

Hardware: Battery 5V, LDR, LED, R 330, R 1k, Pot 100k, Transistor 2N2222

4) AM Transmitter

The next AM transmitter has very low transmission power, so that is only didactic use and only can transmits to no more than five meters. Anyway you should verify the applicable standards. The two potentiometers are 10k and can adjust the transmission frequency of 540-1600 KHz

Hardware: IC 555, Ceramic Capacitor 1 nF, Electrolytic Capacitor 100 uF, Pot 10k

5) FM Transmitter

This FM transmitter has very low transmission power, so that is only didactic use and only can transmits to no more than five meters. Anyway you should verify the applicable standards. You should change the number of turns of the coil to have a good tune.

Hardware: Mic, Antenna, Transistors 2N2222, L 5 laps, Electrolytic Capacitors 10uF, Ceramic Capacitor .1, Variable Capacitor 5-60 pF, Ceramic Capacitor 1pF, 2 R 1k, R 10k, R 15k, R 6k8, R 4k7, R 2k2, R 220

6) Dimmer

An economical way to control the speed of an AC motor is using a dimmer. If you want to control the speed of a fan this is the circuit are you looking for.By changing the value of the potentiometer, amending reason the capacitor charge.This allows control can be the amount of current flowing to the load and so the power therein, is to be consumed.


7) Testing A TRIAC

To test a TRIAC simply we have to place as shown in the image and press the switch. If the lamp is turn on this means that is in good condition.

Hardware: R - 1k, Push Button, Lamp

8) Testing A Zener

To test the Zener simply we have to place as shown in the image and measure the voltage. If the voltage of operation is correct then it's in good condition the Zener.

ZENER Tester

Hardware: Battery 5V, Ceramic capacitor .68 uF, Electrolytic capacitor 1 uF, Electrolytic capacitor 470 uF, R 1M, R 1k, R 10k, Transistor BC547, Diode 1N4004

9) Testing A Mosfet

To test the N channel Mosfet simply we have to place as shown in the image and press the push button. If the LED turn on it means that the Mosfet is in good condition.

MOSFET Tester

Hardware: Battery 5V, Push Button, R 1k, R 470, LED

10) Testing An Optocoupler

To test an Optocoupler simply we have to place as shown in the image and press the button. If the LED turn on it means that the IC is in good condition.

Hardware: Battery 5V, Switch, Transistor 2N2222, Push Button, 2 R 330, LED

© 2017 Guillermo Perez Guillen

Comments

    0 of 8192 characters used
    Post Comment

    No comments yet.

    working

    This website uses cookies

    As a user in the EEA, your approval is needed on a few things. To provide a better website experience, hubpages.com uses cookies (and other similar technologies) and may collect, process, and share personal data. Please choose which areas of our service you consent to our doing so.

    For more information on managing or withdrawing consents and how we handle data, visit our Privacy Policy at: https://hubpages.com/privacy-policy#gdpr

    Show Details
    Necessary
    HubPages Device IDThis is used to identify particular browsers or devices when the access the service, and is used for security reasons.
    LoginThis is necessary to sign in to the HubPages Service.
    Google RecaptchaThis is used to prevent bots and spam. (Privacy Policy)
    AkismetThis is used to detect comment spam. (Privacy Policy)
    HubPages Google AnalyticsThis is used to provide data on traffic to our website, all personally identifyable data is anonymized. (Privacy Policy)
    HubPages Traffic PixelThis is used to collect data on traffic to articles and other pages on our site. Unless you are signed in to a HubPages account, all personally identifiable information is anonymized.
    Amazon Web ServicesThis is a cloud services platform that we used to host our service. (Privacy Policy)
    CloudflareThis is a cloud CDN service that we use to efficiently deliver files required for our service to operate such as javascript, cascading style sheets, images, and videos. (Privacy Policy)
    Google Hosted LibrariesJavascript software libraries such as jQuery are loaded at endpoints on the googleapis.com or gstatic.com domains, for performance and efficiency reasons. (Privacy Policy)
    Features
    Google Custom SearchThis is feature allows you to search the site. (Privacy Policy)
    Google MapsSome articles have Google Maps embedded in them. (Privacy Policy)
    Google ChartsThis is used to display charts and graphs on articles and the author center. (Privacy Policy)
    Google AdSense Host APIThis service allows you to sign up for or associate a Google AdSense account with HubPages, so that you can earn money from ads on your articles. No data is shared unless you engage with this feature. (Privacy Policy)
    Google YouTubeSome articles have YouTube videos embedded in them. (Privacy Policy)
    VimeoSome articles have Vimeo videos embedded in them. (Privacy Policy)
    PaypalThis is used for a registered author who enrolls in the HubPages Earnings program and requests to be paid via PayPal. No data is shared with Paypal unless you engage with this feature. (Privacy Policy)
    Facebook LoginYou can use this to streamline signing up for, or signing in to your Hubpages account. No data is shared with Facebook unless you engage with this feature. (Privacy Policy)
    MavenThis supports the Maven widget and search functionality. (Privacy Policy)
    Marketing
    Google AdSenseThis is an ad network. (Privacy Policy)
    Google DoubleClickGoogle provides ad serving technology and runs an ad network. (Privacy Policy)
    Index ExchangeThis is an ad network. (Privacy Policy)
    SovrnThis is an ad network. (Privacy Policy)
    Facebook AdsThis is an ad network. (Privacy Policy)
    Amazon Unified Ad MarketplaceThis is an ad network. (Privacy Policy)
    AppNexusThis is an ad network. (Privacy Policy)
    OpenxThis is an ad network. (Privacy Policy)
    Rubicon ProjectThis is an ad network. (Privacy Policy)
    TripleLiftThis is an ad network. (Privacy Policy)
    Say MediaWe partner with Say Media to deliver ad campaigns on our sites. (Privacy Policy)
    Remarketing PixelsWe may use remarketing pixels from advertising networks such as Google AdWords, Bing Ads, and Facebook in order to advertise the HubPages Service to people that have visited our sites.
    Conversion Tracking PixelsWe may use conversion tracking pixels from advertising networks such as Google AdWords, Bing Ads, and Facebook in order to identify when an advertisement has successfully resulted in the desired action, such as signing up for the HubPages Service or publishing an article on the HubPages Service.
    Statistics
    Author Google AnalyticsThis is used to provide traffic data and reports to the authors of articles on the HubPages Service. (Privacy Policy)
    ComscoreComScore is a media measurement and analytics company providing marketing data and analytics to enterprises, media and advertising agencies, and publishers. Non-consent will result in ComScore only processing obfuscated personal data. (Privacy Policy)
    Amazon Tracking PixelSome articles display amazon products as part of the Amazon Affiliate program, this pixel provides traffic statistics for those products (Privacy Policy)