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Showing posts from January, 2012

TV Transmitter circuit diagram (VHF)

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Most of people ask TV transmitters.So Today I'm going to give you a very useful circuit diagram.By using this circuit you can send your signals 75m to 100m.This circuit diagram is not my own circuit one of my friends gave me this.I suppose you guys also can send your own circuit diagrams for us.Then we can publish them through our website.Here They have used common transistor BC 108 If you are unable to find this transistor you can use equal transistors like Bc337 2n2222 Bc 546 Note # To make L1 wound 6 turns of #24 enameled wire on a 10mm air former for frequency 60 - 80 MHz For 150 - 180 MHz wound 4 turns and for 180 - 200MHz wound 2 turns. # This circuit operates with 9V power supply # When you build this circuit you have to build this on a little space. # The power of this circuit is 80mW # use a pcb to build this circuit diagram. # This is only for educational purpose.We can bear any responsibility of this If you misused this. # This circuit transmit only video signals .If yo

Material del FREE DAY

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Ya tengo en mis manos el material que he pedido a SparkFun que me he ganado en el FREE DAY de esta año, es la primera vez que participo en este evento y me toco suerte ya que fui unos de los ganadores. Un concurso un tanto difícil de ganar ya que el ganador era elegido por un contador Geiger y llenar correctamente un Captcha compitiendo con otras miles de personas por ser uno de los ganadores. Después de unas tres horas de llenar Captchas apunto de darme por vencido me cambia de pagina y me dice que soy unos de los ganadores y pensar que estaba a unos minutos de cerrar la pagina. Entonces si después de ese mensaje a descansar y quitarse del estrés del momento ya que ya podía gastar mis bien ganados 100 usd en material de la tienda, salió un poco caro el envío y el pago a la aduana pero valió la pena por lo que pedí. - Jumper Cables, Hobby Knife, Resistor Kit, FTDI Cable 5v y un Arduino MEGA PRO 5v. Ojala las tiendas de electronica en México hicieran lo mismo, quizás no en la magnitud q

Burglar alarm

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This is a very useful circuit diagram because these days there are lots of crimes in every where.So I suppose this would be an answer for your matter.Here I have used common Transistor BC107.After fixing this circuit switch on s1 and adjust R2 until the horn makes sound.Then switch off the s1 .Now if some one broke the thin wire the horn will make a sound.You can cover your garden with this circuit Note # Build this circuit on a PCB #Don't supply more than 12V # Use very thin wire to get good results