Do-it-yourself electronics projects: an electronic project blog
A simple voltage divider circuit for a microcontroller.
This is a very simple circuit for dividing down voltages to be used with microcontrollers, or any kind of digital circuitry for that matter. In the example below, a 9v battery (or any higher voltage) is divided down to 3.3v, which can then be used as a DC power supply for circuits such as the PIC16F88, or any other microcontroller which operates at 3.3v. A resistor is used to divide the voltage down to the desired level – in this case, the 9v is dropped to 3.3v across both resistors in series. You can use a higher value lower range resistor if you are using a higher voltage input – for example, if you are using a 12v power source, you could use two 4k7 resistors instead of two 1.8k resistors. The bigger the value of the resistor, the more current it will draw from your power supply – so it’s best to keep them fairly small.
The output of this circuit can then be smoothed with a capacitor if necessary (a 0.1uF capacitor should do fine). The
Mobile gadgets have very low power consumption. This means that we can run our gadgets on batteries for quite a long time. We can also use solar power for our mobile gadgets. Mobile gadgets include: phones, tablets, laptops and netbooks, cameras, music players …
Mobile Gadgets – Do It Yourself Electronics Projects
Mobile Gadgets is an electronic project blog with free schematics, codes and tutorials. DIY electronics projects.
I want to share my DIY electronics projects. I enjoy building things, especially electronic projects that you can use in the home or on the go.
Please feel free to email me or leave a comment if you have questions, suggestions, or just want to say hi.
Electronic projects and electronic kits for all skill levels. We make it easy for you to purchase products, supplies and services from us and our partners. We are widely recognized as a high-quality source for all your electronic project needs.
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“Mobile Gadgets” is a blog that’s dedicated to the design and construction of electronic circuits, in particular ones used as projects. The topics covered will include audio amplifiers and filters, radio transmitters, receivers or transceivers. There will also be articles dealing with the construction of cool gadgets such as FM radios, receivers and transmitters, remote control toys, microcontroller projects and much more! The projects presented here will range from easy to the more advanced ones.
I try to make the articles easy to follow for anyone with a basic understanding of electronics. All the circuits are thoroughly tested and have been proven to work. All the circuit diagrams have been drawn using Express PCB software (www.expresspcb.com), so if you need any clarification regarding any of the diagrams you can download this free software and open them there.
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Enjoy your stay!
I was playing around with a new idea for a circuit and realized that I could turn it into a fun little project. I call it the “Lazer Tripwire” because, well, it uses a laser and trips when you break the beam. The concept was inspired by a really old project I made in high school using a flash light and photo resistor (you can see the original project here).
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