about 1 week ago - No comments
With this simple temperature to voltage converter circuit we can do a precise measurement of the temperature in a room. A NTC resistor or a thermistor is used as a sensor that has a strong temperature dependence.
If the NTC temperature rises then the output voltage rises with 0.5 V per 10C. Conversion factor depends on More >
about 1 week ago - No comments
There are a wide range of applications for light sensitive switches: lighting, entrance door, automatic staircase, automatic opening of doors to the action of a ray of light, alarm systems, etc… Many of us are familiar with photosensitive switches made with a single transistor that is controlled by a photoresistor placed between the base and More >
about 3 weeks ago - No comments
This circuit can cool your heat generating electronic devices by operating a DC fan when the temperature in its vicinity increases above the preset level. Its operation is fully automatic and turns off when the temperature returns normal. It uses a small 12V DC brush less fan used in computers
The circuit exploits the property of More >
about 3 weeks ago - 4 comments
This is a simple 27MHz FM-CB receiver built with TCA440 for listening CB ( citizen’s band ) transmissions with FM (frequency modulation). The selection is made with ceramic filters. This 27 MHz receiver works with an intermediary frequency of 455 kHz. The input filter is 27 MF type, so we obtain an acceptable attenuation of More >
about 4 weeks ago - 1 comment
THis Wien bridge oscillator is very simple and as every wien oscillator has low distorsion and the resonance frequency can be easily adjusted. This frequency depends on a pair of resistors and a pair of capacitors and is defined by the formula: F = 1/2ΠRC. In this wien oscillator circuit, R is formed by R1 More >
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about 1 year ago
indeed a very good website, especially for the electronic hobbyists all around the world. nice work mahn…keep it up.
Recently I had seen on of your post on one of the blog regarding wireless power transfer.Iam also doing a similar project in college,but could not progress much.
So it is my humble request to you to send me ur schematic of 3KW 11Ghz transmitter using quilostron.
Thank you
about 5 days ago
Recently I had seen on of your post on one of the blog regarding Wireless headphones transmitter & receiver schematic. Iam also doing a similar project in college,but could not progress much.
So it is my humble request to you to send me working principle of transmitter & receiver.