Showing posts with label ipod. Show all posts
Showing posts with label ipod. Show all posts
Wednesday, September 3, 2014
Solar IPod Charger Project and Schematic
Solar iPod Charger Schematic
The Solar Panel
To accomplish our iPod solar charger we acclimated a 250mA 6 Volt Solar Console (available in the REUK Shop). Alike in the brightest sunshine the voltage is not badly aloft that of the iPod battery, and the accepted is affluence abundant to allegation the array in a few hours in ablaze altitude (even in the UK!).
A blocking diode should be acclimated (in the absolute solar console lead) to anticipate the iPod array from boring clarification at night if it is still affiliated to the panel. Unforunately this after-effects in up to 0.7 Volts actuality absent as calefaction in the diode, so it can be larboard out if you adopt to accept a faster charger which will allegation the array in lower ablaze conditions.
Note that abounding solar panels are supplied with a branch adapted blocking diode.
In adjustment to adapt the voltage from our 6 Volt solar console we acclimated an LM317T dent (available from the REUK Shop) in the afterward cool simple schema:A blocking diode should be acclimated (in the absolute solar console lead) to anticipate the iPod array from boring clarification at night if it is still affiliated to the panel. Unforunately this after-effects in up to 0.7 Volts actuality absent as calefaction in the diode, so it can be larboard out if you adopt to accept a faster charger which will allegation the array in lower ablaze conditions.
Note that abounding solar panels are supplied with a branch adapted blocking diode.
Voltage Regulator
...where R1 is a 270 Ohm resistor, and R2 is theresistor used to set the output voltage according to the following equation:
R2 = R1 * ( (VOUT/1.25) -1 )
Since our desired charging voltage is 5 Volts, we see that ideally R2 would be 270 * ((5/1.25) -1) = 810 Ohms. This is not a standard resistor size, however we had an 820 Ohm resistor which should result in an output voltage of 5.05 Volts.
Wiring up the aloft ambit on a prototyping breadboard with a 270 Ohm R1 resistor, and 820 Ohm R2 resistor we can affirm that the achievement voltage is 5.06 Volts - absolute for our iPod charger. It is capital to analysis that the achievement voltage is about 5 Volts application a acceptable multimeter afore attempting to allegation your iPod or the array and/or iPod itself could be damaged.
iPod Solar Charger Prototyping
Connecting the Charger to the iPod
The iPod is supplied with a USB cable. One end is acquainted into the iPod and the added end has a macho USB-A plug.
It can generally be cheaper to buy a cable with a adapted changeable USB-A adapter and cut it off to use in this project. Simply affix the red USB cable wire to the 5V absolute achievement from the LM317T, and the atramentous USB cable wire to the arena (negative).
According the blueprint beneath the 5 Volt achievement from the LM317T should be affiliated to pin 1, and the arena (negative) affiliated to pin 4.
Thursday, August 21, 2014
Making High Quality iPod iPhone Speakers
This high quality and low cost speaker was designed to be used for iPod or iPhone with the use of old car Hi-Fi speaker and some computer components. Other materials used are shown in the image below and they include an amplifier, 240V-12V power supply, tweeters, crossovers, sealed lead acid battery, MDF, filler, Apple universal dock & remote, glue, nails, and white gloss paint.
The front baffle board was drawn on a piece of MDF in order to use it as a template to make the rear of the box. The dimensions of the box based on the speaker do not necessarily need to be exact because the speakers were quite old as it comes from an old Renault 19.
From the photo of the round bits below, the trusty circular saw was used to cut loads of 1 inch by 15 cm strips of MDF. Between the front and rear baffle, the strips were glued and nailed. The baffles were cut out using a jigsaw and the strips were kept as close to each other as possible.
![Hacks]()
The first coat of filler can take 3 batches to finish and they were applied as neatly as it can after being mixed up. Until it was somewhere near as shown below, a few more coats can be applied. A surform will be applied until it was about the right shape once the first coat of filler had set. Sanding could be done by hand or it would be better to use an electric sander if available. A jigsaw was used to cut out the speaker and tweeter holes as shown below and a flange for the speaker to sit into was made using the router.
![Hacks]()
![Hacks]()
A hole of about 12mm on the top and 3mm on the back were drilled once all the holes were cut. The edges were masked up and the baffle was spray painted in matt black as shown below. The first layer of white primer can be applied once the black was dry and the masking tape was removed. A couple of coats of normal white primer was applied and then followed by a light sand. In between, a bit of sanding was applied as 3 coats of white gloss were given.
![Hacks]()
![Hacks]()
A grill for the front had to be made for the full fake Apple. To mark out the shape on a scrap bit of 5mm laminate flooring, this was a simple matter of using the box as a template and then sprayed it in matt black. Some black nylon cloth was glued onto the panel with some spray carpet adhesive when the paint was dry as shown in the image below.
Some black drywall screws were used to screw the 13cm speaker into the box as well as the amp and crossover networks and epoxy resin was used to glue the tweeters. After soldering all the connections, the lead acid battery was glued inside as shown in the next image. The amp of the battery was powered by wiring the 12V to the battery. The iPod universal dock was glued on the top of the box with wires for USB and audio. The finished product of cool looking iPod speaker is also shown below.
![Hacks]()
![Hacks]()
The front baffle board was drawn on a piece of MDF in order to use it as a template to make the rear of the box. The dimensions of the box based on the speaker do not necessarily need to be exact because the speakers were quite old as it comes from an old Renault 19.
From the photo of the round bits below, the trusty circular saw was used to cut loads of 1 inch by 15 cm strips of MDF. Between the front and rear baffle, the strips were glued and nailed. The baffles were cut out using a jigsaw and the strips were kept as close to each other as possible.
The first coat of filler can take 3 batches to finish and they were applied as neatly as it can after being mixed up. Until it was somewhere near as shown below, a few more coats can be applied. A surform will be applied until it was about the right shape once the first coat of filler had set. Sanding could be done by hand or it would be better to use an electric sander if available. A jigsaw was used to cut out the speaker and tweeter holes as shown below and a flange for the speaker to sit into was made using the router.
A hole of about 12mm on the top and 3mm on the back were drilled once all the holes were cut. The edges were masked up and the baffle was spray painted in matt black as shown below. The first layer of white primer can be applied once the black was dry and the masking tape was removed. A couple of coats of normal white primer was applied and then followed by a light sand. In between, a bit of sanding was applied as 3 coats of white gloss were given.
A grill for the front had to be made for the full fake Apple. To mark out the shape on a scrap bit of 5mm laminate flooring, this was a simple matter of using the box as a template and then sprayed it in matt black. Some black nylon cloth was glued onto the panel with some spray carpet adhesive when the paint was dry as shown in the image below.
Some black drywall screws were used to screw the 13cm speaker into the box as well as the amp and crossover networks and epoxy resin was used to glue the tweeters. After soldering all the connections, the lead acid battery was glued inside as shown in the next image. The amp of the battery was powered by wiring the 12V to the battery. The iPod universal dock was glued on the top of the box with wires for USB and audio. The finished product of cool looking iPod speaker is also shown below.
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