This simpe circuit will convert the positive input voltage become negative voltage.
Schematic diagram:
Component list: Part Total Qty. Description R1 1 24K 1/4 Watt Resistor R2 1 56K 1/4 Watt Resistor C1 1 3300pF 25V Ceramic Capacitor C2 1 47uF 25V Electrolytic Capacitor C3 1 10uF 25V Electrolytic Capacitor D1, D2 2 1N4148 Silicon Diode U1 1 555 Timer MISC 1 Wire, Board
Notes:
V+ can be anywhere from 4 to 16V. -V is one volt less than V+. So for -12V output, use +13V input. The...Read Full Story
Kenwood KAC-9104D 1800-Watt Max Power 1 ohm Capability Class D Mono Power Amplifier with Variable LPF by Kenwood (27) Buy new: $350.00 $169.95 2 used & new from $150.00 (Visit the Top Rated in Amplifiers list for authoritative information on this product's current rank.) Click Here Check Price and Read MoreRead Full Story
Fractal Antenna
Where do I buy a fractal antenna?
This PBS program says they get better reception.
fractal antenna best answer:
Answer by cpnpicard1 www.fractenna.com
As Seen on TV – Cell Phone Antenna Booster
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fractal antenna
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Planet Audio BB1400.1 1900 Watts 1-OHM Stable Max Power Class D Monoblock Power Amplifier by Planet Audio (3) Buy new: $799.00 $226.41 17 used & new from $139.99 (Visit the Most Gifted in Mono Amplifiers list for authoritative information on this product's current rank.) Click Here Check Price and Read MoreRead Full Story
10 Pack of Universal Generation X Cell Phone Antenna Booster Signal Enhancers
Cell Phones Accessories – click on the image below for more information.
Reduces dropped calls and fading signals.
May Significantly improve signal strength.
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Can be used with any cell phone.
Cell Phones Accessories
This is a bundle pack of 10 Antenna Boosters. These high signal strength boosters will help to receive calls and help prevent calls from being dropped. *PLEASE...Read Full Story
Zagall offers this USB MP3 Player FM Transmitter with Remote in Black, model no. DJ-980, for $5.99 with free shipping. That's the lowest total price we could find by $12, although we saw one in white for $1 less in January. It features a 206 channel FM transmitter, remote control, 3.5mm jack, USB port, and SD card slot.
One of the great features of owning a smartphone is that it allows us to carry our entire library of music, not to mention stream live audio or video, anywhere we go. That feature is great for when you get stuck in line at the DMV or are stranded in the waiting room at your doctor's office, so it seems only natural that smartphone users would want to listen to that music or streaming audio in their car as well. But unless you have a stereo...
Today only, DailySteals offers the DGL FM Transmitter and Car Charger for Apple iPod or iPhone in Black (pictured) or White, model no. FT-1226, for $4.99 plus $4.99 for shipping. That's $45 off and the lowest total price we've seen for such a transmitter. It comes with a remote control and charges via USB or car charger.
When the Regency TR-1 transistor radio came out onto the market in the 1950s, it was hailed as a modern marvel of microelectronics. With only four transistors and a handful of other components, the TR-1 was a wonder of modern engineering. [Sprite_tm] may have those old-timers beat, though. He built an FM transmitter with the lowest [...]
This is a very cute hack that does something which I thought was impossible: an implementation of an FM transmitter that has exactly two components: a battery and an ATtiny45 microcontroller. It’s brilliantly obtuse and cool: Sprites mods – AVR-based FM-transmitter – Intro, theory The basic idea is to trick the internal oscillator of the [...]
The Soundfly View from Satechi (Credit: Satechi) If you're looking for a way to keep your hands free from the phone while driving, as they should be, here's something to consider. Satechi announced today its new Soundfly View accessory , a Bluetooth FM transmitter for hands-free calling and wirelessly streaming music. The device connects to the in-car 5V port and basically becomes a bridge ...
Navigation software maker NNG, which makes iGo My Way, has launched its first hardware product, the iGo Primo Car Dock, which is compatible with all current models of the iPhone (3G, 4, 4S). The mount incorporates its own microphone and can send audio to an automobile's audio system via direct wire connection to the AUX port or through a built-in FM transmitter. A companion application ...