http://www.hobby-hour.com/electronics/ Hobby electronics - for people who want to build electronic gadgets for fun or profit. Schematics, tutorials, tools, technical data, pinouts, online calculators for for the electronics hobbyist, engineer or student. The calculator displays the value and tolerance of 3, 4 and 5 band color coded resistors. Performs a check to verify if the calculated resistance matches one of the standard values. The resistor value to color stripes converter... http://www.hobby-hour.com/electronics/resistorcalculator.php http://www.hobby-hour.com/electronics/resistorcalculator.php A long list of all E24 series resistors from 0.1 ohm to 10 Mohms - with the shorthand notation, tolerance range and color code... http://www.hobby-hour.com/electronics/e24-resistors.php http://www.hobby-hour.com/electronics/e24-resistors.php This short tutorial describes common procedures for testing of Si and Ge diodes, Zeners, LEDs, bipolar and mosfet transistors for common failures like shorts, leaks... http://www.hobby-hour.com/electronics/testing-semiconductors.php http://www.hobby-hour.com/electronics/testing-semiconductors.php The microphone connector on most computer sound cards will be pink, the line out or headphone will be lime green, and the stereo line in will be... http://www.hobby-hour.com/electronics/sound-card-color-code.php http://www.hobby-hour.com/electronics/sound-card-color-code.php Even if you have only a passing interest to electronics you should consider buying a cheap analog or digital multimeter because it has many uses in the home, on the job... http://www.hobby-hour.com/electronics/multimeters.php http://www.hobby-hour.com/electronics/multimeters.php The LM4652 is a fully integrated H-bridge Power Mosfet IC providing a high efficiency amplifier solution suitable for self-powered speakers, car boosters... http://www.hobby-hour.com/electronics/170w-audio-power-amplifier.php http://www.hobby-hour.com/electronics/170w-audio-power-amplifier.php The TDA2005 is a dual audio power amplifier specifically designed for car radio applications... http://www.hobby-hour.com/electronics/power-audio-amplifier-ic.php http://www.hobby-hour.com/electronics/power-audio-amplifier-ic.php VLF or Very Low Frequency, PI or Pulse Induction, VLF or Very Low Frequency are the 3 main metal detector types used today... http://www.hobby-hour.com/electronics/metal_detectors.php http://www.hobby-hour.com/electronics/metal_detectors.php The approximate schematic of a Sound Blaster soundcard microphone input circuit shows that the +5V voltage on the connector is heavily current limited. The voltage might not be exactly 5V, but it is usually something between 3 and 5V when no microphone... http://www.hobby-hour.com/electronics/computer_microphone.php http://www.hobby-hour.com/electronics/computer_microphone.php Commonly used resistors have 4 color bands, but some precision resistors can have 5 or 6 bands. 5% and 10% tolerance resistors usually have 4 bands, with the first 3 aligned towards... http://www.hobby-hour.com/electronics/resistor_color_code.php http://www.hobby-hour.com/electronics/resistor_color_code.php A hobby enjoyed by thousands of people throughout the world - ham radio or amateur radio - uses radio equipment to communicate with other radio amateurs for recreation, public service or self-training. The research done by amateur radio enthusiasts has founded new industries, built economies and saved lives... http://www.hobby-hour.com/electronics/ham_radio.php http://www.hobby-hour.com/electronics/ham_radio.php There are 2 symbols used to represent letters in the Morse code, called dots and dashes. The length of the dot determines the speed at which the message is sent, and is used as the timing reference. A dash is conventionally 3 times as long as a dot and... http://www.hobby-hour.com/electronics/morse_code.php http://www.hobby-hour.com/electronics/morse_code.php The wireless FM microphone has a useful transmitting range. Despite the small component count and a 3V operating voltage it will easily penetrate over 3 floors of an apartment... http://www.hobby-hour.com/electronics/wireless_microphone.php http://www.hobby-hour.com/electronics/wireless_microphone.php The FM30B Digital FM Stereo Transmitter Kit is designed around an RF tight vinyl clad metal enclosure for noise and interference free operation. It has a 25mW output and operates on 13.8V DC to 16V DC... http://www.hobby-hour.com/electronics/electronic-kits.php http://www.hobby-hour.com/electronics/electronic-kits.php