JWIN JAC32 Dual Voltage Egg Power" Universal AC Adapter
by jWIN
(Click here)
Customers in the UK,
buy this product at amazon.co.uk
for British Pounds
Digital Photo Product Details
Manufacturer: jWINProduct features:
- Egg Power Universal Ac/Dc
- Voltage Selector Switch ;
- Gift-Box Package
- Dual Voltage Converts ;110/220V AC To DC
- Universal adapter
Digital Cameras Photo Reviews of JWIN JAC32 Dual Voltage Egg Power" Universal AC Adapter
Customer Review: For my purpose, product was perfect.
Summary: 5 Stars
This is one of those multiple-voltage wall warts which has a sliding switch to set the voltage to one of 7 values from 1.5 to 12 volts DC. You see these for $10-$15 in stores, but Amazon's 3rd party unit is $3 including free shipping (today 12/2/07). The shape is unusual, being roughly a sphere of diameter 2.5 inches. There are 6 different plug styles included that might include what you need. Polarity is selected by the way you attach the plug to the cable from the adapter. The box says that a load current of 300 mA is "required". Since this is an unregulated DC power supply, the actual output voltage (at each switch setting) varies with load current, so I presume at 300 mA load the official voltages are realized. At lower currents, the output voltages are higher than nominal and might cause damage. For my application, I built an external circuit with about $1 worth of parts to obtain a *regulated* voltage source at 1.5 volts to act as a battery replacement/AC adapter for an MP3 player, a Creative Muvo V100 1GB also from Amazon. This particular MP3 player allows the 1.5 volts to be supplied directly to the normal USB connector power pins, so my "AC adapter" connects to the player with a Dollar Store USB cable cut off at one end (warning: these cheap cables are fine for power, don't use them for USB 2.0 fast transfer). My goal here was to have an MP3 player run 24x7 for a special purpose without using a battery; the Muvo draws maybe 35 mA. So, the bottom line: this wall wart can serve as the basis of a simple regulated power supply putting out anywhere from 1.2 to ~12 volts as shown page 14 of the National LM317L data sheet (Google). The regulator uses this LM317L, 2 resistors (which determine the regulated output voltage) and 2 small caps. It is not easy to find "AAA battery replacement" regulated power supplies at low cost. As an aside, the Muvo is a good design, hardware and software. It's weakness is that it fails to support the fast USB 2.0 download rate, supporting only the "slow USB 2.0" download rate which is the same as USB 1.0 -- a bit of shoddy specsmanship. In my application, I download once so no matter. On the other hand, its battery life is long and current requirement low. This player was $33 with free shipping from Amazon, is now $35 without.
Description of JWIN JAC32 Dual Voltage Egg Power" Universal AC Adapter
JWIN JAC32 Egg Power Universal AC/DC Adapter (Current: 300 mAh, Power: 6W) 6-output, 6-way Voltage selector switch Gift-box package Dual voltage converts 110/220V AC to 3, 4.5, 6, 7.5, 9, 12V DC Current: 300 mAh Power: 6WDigital Cameras and Photo Categories