2n3904 - Circuitos electrónicos

Touch alarm electronic circuit with 555 and a output relay

https://www.electronica-pt.com/alarmes/alarme-pic16f84

Diseño de circuitos electrónicos

http://electronicavm.wordpress.com/category/diseno-de-circuitos

+-spkr 10 ohm 2 watt 0.1 uF .33 ohm 5 watt.33 ohm 5 watt.33 ohm 5 watt .33 ohm 5 watt47 ohm 1/2 watt 47 ohm 1/2 watt e e e 2SB 554 or MJ 150252SB 554 or MJ 150252SA1011.01 uF220 ohm 4.7 k ohm FR152 2N3906 e1N9141N914 33 pF NPO 2.7k 5 watt1N4744e 2N5087

http://www.high-voltage-lab.com/projects/4/km241.pdf

100 uF 33 ohms 1/2 watt +55 volts e 2N3906 e 2SC2344 2. 7 k ohm 5 watt 2k ohm PC POT 2SA1011 2SD424 or MJ15024 e 2SD424 or [. . . . . ]

http://www.diy-electronic-projects.com/projects/4/km241.pdf

In this project, we show how to build a sine wave generator circuit with a transistor and a few simple components such as capacitors and resistors.

http://www.learningaboutelectronics.com/Articles/Sine-wave-generator-circuit-with-a-transistor.php

This is simple Solar plant watering alarm circuit. It will sound alarms when the soil is dry. The trees have died.It the solar sell is 6V DC power supply

https://www.eleccircuit.com/simple-solar-plant-watering-alarm-circuit

Circuito para armar un Oscilador de 32KHz que nos puede sacar de apuro cuando necesitamos una señal de frecuencia baja.

http://ayudaelectronica.com/oscilador-lc

This simple circuit is the electronic version of the combination lock. Using the special purpose LS7220 digital lock IC, the circuit allows a 4 digit combination of your choice to activate a relay for a set period of time. This relay can then be used to trigger a lock solenoid, enable a

http://www.radiolocman.com/shem/schematics.html?di=54786

Maxim > Design Support > Technical Documents > Application Notes > Temperature Sensors and Thermal Management > APP 3872 Keywords: temperature sensors, data-acquisition systems, temperature-to-period converter APPLICATION NOTE 3872 Telecomm Supply Powers Temperature Sensor Jul 25, 2006 Abstract: The components shown enable this temperature-to-period converter (IC1) to interface with standard industrial logic levels, while operating on a -48V [..].......

http://pdfserv.maximintegrated.com/en/an/AN3872.pdf

Are there light switches in your home that aren't as conveniently located as you would like? This laser-based switch decoder and driver allows for flexible control of those lights located in less than ideal places.

https://www.designnews.com/content/gadget-freak-case-272-motion-sensor-light-switch/166482560644454

AN-1412 APPLICATION NOTE One Technology Way · P.O. Box 9106 · Norwood, MA 02062-9106, U.S.A. · Tel: 781.329.4700 · Fax: 781.461.3113 · www.analog.com 4 mA to 20 mA Process Control Loop Using the AD5662 DAC CIRCUIT FUNCTION AND BENEFITS In many process control applications, 2-wire current transmitters are often used to transmit analog signals through noisy environments. These current [..].......

https://www.analog.com/media/en/technical-documentation/application-notes/AN-1412.pdf

You are asking how to connect up some lights so that when the phone rings, they flash. This is very useful in a situation were there is lots of noise and it is impossable to hear the phone, such as a workshop. Here is such a device. The ring detect part of this circuit came from

http://www.circuit-finder.com/categories/telephone-related/miscellaneous-telephone/316/ringing-phone-light-flasher

The goal of this project is for me personally to learn a little more about fm transmitters and fm bug making (may the HAM radio gods bless me in this pursuit). The ideal outcome of this project is a very small and full functional FM transmitter that we can stick into a plastic mint box. In order to be able to build this, we'll have to learn a lot about amplifiers, LC oscillators, mixers, antennas and FM. This project assumes you're already comfortable build your own PCB boards. If you're not pl.......

http://www.electronics-diy.com/electronic_schematic.php?id=989

Un oscillateur schéma montage circuit de pratique du code Morse

http://www.raqi.ca/ve2crd/cours/oscillateur.html

Automatic fan controller circuit

http://www.coolcircuit.com