Transistor npn - Circuitos electrónicos
Personal Alarm Small, portable, anti-bag-snatching unit Also suitable for doors and windows control Circuit diagram: Parts: R1____________330K 1/4W Resistor R2____________100R 1/4W Resistor C1_____________10nF 63V Polyester or Ceramic Capacitor C2____________100µF 25V Electrolytic Capacitor Q1____________BC547 45V 100mA NPN Transistor Q2____________BC327 45V 800mA PNP Transistor SW1____________Reed Switch and small magnet (See Notes) SPKR___________8 Ohm Loudspeaker (See Notes).......
http://www.ee.teihal.gr/labs/electronics/web/downloads/doors_and_windows_control.pdf
This is 12v to 5v voltage regulator circuit using IC-7805 and use power NPN transistor TIP41 to boost up current,it is small and cheap
https://www.eleccircuit.com/12v-battery-to-5v-1500ma-dc-converter-regulator
Tal como dijimos en un artículo que publicamos hace ya unos 8 años, si tuvo la tentación de cargar una batería de níquel-cadmio de 12V a partir de otra batería idéntica, habrá comprobado, sin duda alguna, que dicha misión es imposible de conseguir a pesar de que las tensiones nominales de los depósitos "sean idénticas" y que una de ellas esté completamente cargada. La razón es bien sencilla: contrariamente a lo que podía pensarse por el valor de su tensión nominal, fijada en 1, 2V.......
https://elrincondeloscircuitos.blogspot.com/2011/01/cargador-de-baterias-12v.html
This is the schematic diagram of cellphone charger circuit which connecter to the USB as main power. Whit this circuit, you can charger your cell phone from USB port in your PC or notebook. The majority of the cellphones battery is appraised 3. 6 volts at 1000 to 1300 mah. These battery packs have 3 Nimh or Lithium cells having 1. 2 volt rating. Generally.......
https://skema-elektronik.blogspot.com/2014/06/this-is-schematic-diagram-of-cellphone.html
A simple tachometer circuit using one NPN transistor. (12/04/2007)
http://www.josepino.com/circuits/?tachometer-circuit
by Travis Goodspeed
https://travisgoodspeed.blogspot.com/2010/12/hacking-knitting-machines-keypad.html
Maxim > Design Support > Technical Documents > Application Notes > Voltage References > APP 4412 Keywords: voltage references, buffer amplifiers, feedback loop, error amplifier, force/sense pins, npn transistors APPLICATION NOTE 4412 80mA Precision Reference Jul 27, 2009 Abstract: This application note presents a circuit that adds a transistor buffer in the error-amplifier feedback loop of a voltage-reference [..].......
http://pdfserv.maximintegrated.com/en/an/AN4412.pdf
A Circuit: Here is a circuit that can be used to control switchable electronic devices. Add some long leads to the PhotOResistor (CdS cell) and mount it pointed at your computer monitor. Use black card or a film cannister to control ambient light falling on the sensor. If you use this circuit to launch a model rocket, you must have a manual switching system built into the circuit and follow all model rocket flying safety procedure.......
https://ramon-electronica.blogspot.com/2011/01/4066.html
keywords: single transistor flyback driver, single MOSFET flyback driver, simple flyback driver, one transistor flyback driver. So far, i have dealt with several powerful flyback drivers such as ZVS and 555 timer. To be honest i m more interested in a simpler but powerful flyback driver, so i researched about drivers that utilise only one transistor. The most popular one-transistor flyback driver is one that uses the ubiquitous 2N3055 NPN silicon power transistor. The schematic is as shown below.......
https://yamanashimasamune.blogspot.com/2011/09/single-transistor-flyback-drivers.html
Here the circuit diagram of solid state tesla coil with 555 timer. Single transistor flyback driver induced a lot of complications on account of it really is operating principle. I received e-mails from those who had been unable to obtain it functional even after they are positive that their flyback and transistor is Okay. Moreover, because it is resonance frequency is determi.......
https://powersupplyadapter.blogspot.com/2012/01/solid-state-tesla-coil-with-555-timer.html
La sonda lógica es un instrumento de suma utilidad cuando hay que analizar circuitos digitales. Como la mayoría de vosotros ya sabéis, los circuitos digitales solo trabajan con dos estados o niveles de tensión. Si hablamos de lógica TTL(lógica transistor-transistor) la tensión booleana para el 1 lógico e.......
https://roboticayelectronica.blogspot.com/2011/08/sonda-logica-con-display-7-seg.html
Our purpose here is to explore the potential of PIC12F683 microcontroller for which we need a development board.The good thing is we are going to make our own board.The schematic and the actual board that I have built are shown below. I soldered all the components on a 12 x 8 cm general purpose prototyping board.Completed Board It has following features in it:1. A Regulated.......
https://picboard.blogspot.com/2010/02/make-your-own-pic12f683-development.html
The stepper controller circuit is very interesting, since most lines the step motor controllers are very expensive. The circuit is made ??of standard components and can easily be adjusted by a computer. If you cheap surplus transistors and stepper motors, the price of the circuit can be less than $ 15. Stepper Motor Controller Circuit .......
https://elektroarea.blogspot.com/2011/11/stepper-motor-controller-using-ic-4027.html
De: gustavo (noreply-comment@blogger.com)Enviado: jueves, 20 de mayo de 2010 09:49:09 a. m. Para: hokkaido_peru@hotmail.comgustavo ha dejado un nuevo comentario en su entrada "Buzzer con un tiempo de retardo":Hola sr Jorge Flores, le escribo desde Mexico. Quisiera saber si me pudiera ayudar; necesito hacer un circuito simple de un "switch optico"con led infrarojos(transmisor y receptor). Mire, lo necesito para complementar un monedero electronico, pues a este le meten un alambre y marcan "credit.......
https://jorgefloresvergaray.blogspot.com/2010/05/switch-optico-con-infrarrojos.html
This is a RF amplifier circuit for 10Mhz - 500Mhz input signal. The RF amplifier is using single power transistor BFR540 as the main component to amplify the input signal. The BFR540 is an NPN silicon planar epitaxial transistor in a SOT23 plastic package. BFR540 featured with high power gain, low noise figure, high transition frequency and have gold metallization e.......
https://radiofrequencyamplifier.blogspot.com/2011/10/rf-amplifier-circuit-10mhz-500mhz-based.html
1 2 3