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Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.

  • Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.

lm3914

  1. D

    LM3914 with a buzzing relay

    I am building a 5v humidity control for my bathroom extractor fan. The circuit, (image attached), is based on information I have read on the internet and uses an LM3914, an led bar graph, a transistor and a 5v relay. The humidity sensor I have is the Velleman mm102. Seemed like a nice little...
  2. mastro14720

    LED VU meter

    Hi everyone, I am wanting to build a project that uses LEDs to "dance" or react to music. Here is a YouTube video of what I'm aiming for. The IC I want to use for this is the LM3914. I've tested the chip using a potentiometer as a voltage divider (for the signal source) and it worked great...
  3. G

    Lm3914 and a couple of 4014s

    It's not practical I know, but I thought it would be fun. A 200 LED oscilloscope as a good soldering project for low speed, simple projects etc, ie: 555 projects. Easy I thought, use the LM3914 to drive the ten vertical 10 LEDS while the two 4017s to handle the twenty horizontal LEDS in a 10x20...
  4. P

    Source code for LM3914.exe VB program.

    Please, someone have and can get share the source code in VB of LM3914.exe program posted here in the past in " help needed in lm3914 circuit design" at May, 11, 2010. I need it to try to do the same for others IC and share here. Since then my thanks for that. Pedro Santos

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