Transistor npn - Circuitos electrónicos

This is the circuit diagram of TRIAC, SCR and Transistor tester. This is a very simple circuit which can be used for testing of SCRs as well as triacs. The circuit could even be used for checking of PNP and NPN transistors. The circuit works on 3V DC, derived using a zener diode in conjunction? Read More » The post Triac, SCR, Transistor Tester appeared first on Electronic Circuit Diagram. This is the circuit diagram of TRIAC, SCR and Transistor tester. This is a very simple circuit which can b.......

http://circuitdiagram.net/triac-scr-transistor-tester.html

The FM transmitter circuit is using NPN transistor 2N2222. The L1 and C1 producess necessary oscillations Q1. The collector capacity C4, R3 and R4 resistor performs the function of the output mix theaudio to stereo player or i-emitter resistor R2 Pod........

https://audio-schematic.blogspot.com/2011/09/fm-transmitter-circuit-using-2n2222.html

The latest version of the lap timer includes two new features -1) External Audio - There is now an option to use a very simple amplifier circuit which is small enough to fit inside most project boxes. This will give you a lot more volume when you are using the system outdoors. 2) Countdown - With countdown switched on, the lap timer will beep to count down the last few seconds of the current lap time - it adds a little extra pressure - to beat the lap you have to beat the beeps. For previous ste.......

https://rcarduino.blogspot.com/2012/11/lap-timer-part-5-buzzer-external-audio.html

The circuit functions like a unijunction transistor relaxation oscillator. The base of the lower PNP transistor is biased at roughly half supply. As the 100pF capacitor is charged up through the 1G resistor, the base of the upper NPN transistor reaches a critical voltage, which begins to forward bias the base-emitter junction..........

http://www.discovercircuits.com/H-Corner/Ultra low current oscillator.htm

In this circuit a LM339 quad voltage comparator is used to generate a time delay and control a high current output at low voltage. Approximatey 5 amps of current can be obtained using a couple fresh alkaline D batteries. Three of the comparators are wired in parallel to drive a medium power PNP transistor (2N2905 or similar) which in turn drives a high current NPN transistor (TIP35 or similar)........

http://www.circuit-finder.com/categories/timer/610/low-voltage-high-current-time-delay-circuit

Recibí varias placas de este modelo de FAX/modem para PC interno PCI, Motorola FB WS-5614PSL 56K. Encontré componentes interesantes y utilizables, como el mini relay, el transductor de sonido miniatura, un optoacople de gran aislación entrada-salida y un transistor darlington NPN con una ganancia de 30. 000. Y varios componentes más........

http://robots-argentina.com.ar/didactica/desarme-de-una-placa-de-modem-motorola-fb-ws-5614psl-56k

En esta nota les mostrare el funcionamiento del TL494 con una pequeña carga en modo StepUp Booster, mediante un driver fet realizado con una configuración complementaria de transistores BJT NPN y PNP, excitaremos el gate de un transistor de potencia MOSFET que controlara el switcheo de una bobina de 2A para luego rectificarse y filtrarse.Este proyecto no cuenta con Feedback, es decir, el ciclo de trabajo PWM lo controlamos con un potenciometro de forma independiente de la salida.Para que la te.......

https://electgpl.blogspot.com/2017/08/prueba-de-funcionamiento-del-tl494-con.html

delabs Notes - In a Circuit Module, if all Power and Signal Polarities are reversed. All NPN to PNP, All N-Channel to P-Channel and Vice Versa. All Diodes and Caps too turned around. This Topsy Turvy or Mirror Design ought to work in Theory. It has worked for some circuits in practice too in my experience. ? Some believe that N-Channel is more Robust than the P Type. In Bipolar Transistor NPN is ........

http://design.dapj.com/2017/03/the-mosfet-in-power-electronics.html

Teorema de la máxima transferencia de energía. Circuito de antena. Circuito y prueba del receptor de 1 transistor.

http://electronicacompleta.com/lecciones/circuito-de-entrada-y-antena

UM3561A CARACTERISTICAS § § § § § § Pueden ser seleccionados cuatro sonidos. Tensión Típica de trabajo 3v. Oscilado RC r con resistencia externa. El sonido [. . ]

https://www.todopic.com.ar/utiles/um3561a.pdf

Ingeniería Técnica de Sistemas Electrónicos. Escuela Técnica Superior de Ingeniería Industrial y de Telecomunicación. Electrónica Digital I. Se valorará la corrección del trabajo así como la [. ]

http://personales.unican.es/manzanom/Planantiguo/EDigitalI/Guion_Tra4.pdf

Automatic Turn-off Relay, Electronics Tutorials with circuits and examples, 555-741-PLL-relays-Triac-SCR-Resistors-Capacitors-coils-ic.

http://www.tonyvanroon.com/oldwebsite/circ/relay62.html

This is an easy telephone amplifier circuit. It will increase the signal of the telephone lines up, drive relay to controls the large electric bells

http://www.eleccircuit.com/easy-telephone-amplifiers-circuit

230 Electrónica Digital T4 TEMPORIZADORES: OSCILADORES Y MONOSTABLES T4. 1. Comportamiento circuital de los condensadores T4. 2. Monostables T4. 3. Circuitos astables T4. 4. El [. . ]

http://diec.cps.unizar.es/~tpollan/libro/Apuntes/digT4.pdf

ElectrOSuite.com - Pulse Oximeter LED Current Sinks ADA4505 2 Op Amp. Low power precision current source. Single supply operation

http://electrosuite.com/generator/pulse-generator-2/pulse-oximeter-led-current-sinks-ada4505-2-op-amp.html