I was getting ready for a long train ride from KY to DC and found out there aren’t any AC outlets for coach seats! A 15hr ride isn’t too bad when you have a smart-phone; then again, the stock battery on an HTC Incredible will last only about 3hrs of heavy usage. Not good. I wanted a way to be able to use it for, well, 15hrs. So, using some easy-to-find parts I made an extended battery that will charge the phone via USB. I also wanted the extended battery to be rechargeable. So, I need to be able to have access to the battery contacts; maybe later I will add something fancier, but for now the battery disconnects from the USB circuitry. Here’s my finished product, and how to make it.
I bought a battery from the local Home Depot for $20 (look in the outdoor lighting aisle). It is 6V and provides 6.5AH. You can get it cheaper at places like batterymart.com, but I was in a hurry and the shipping on seal-lead acid batteries is not cheap. The higher the amp-hours (6.5AH in this case), the longer you will be able to run your USB device.
Now for the voltage – USB uses 5V DC. I needed to drop the voltage from 6V to 5V, preferably without too much loss. There are three main options: voltage divider using resistors, non-switching regulator, and a switching regulator. In the case of the voltage divider, the resistors basically turn the extra voltage into heat, and they would need to be rated for higher power than the typical $0.01 resistors. Switching regulators, or DC-to-DC converters, are much higher efficiency, but are more costly. Also, I couldn’t find one that would work at Radio Shack, so I went with a non-switching regulator: the 7805.
The 7805 regulator will take voltages higher than 5V and hold them at 5V, also allowing up to 1A of current. While that’s much more than is needed, it gives a nice buffer. A regulator has three legs: 1) input, 2) ground, and 3) output, where the ground leg is shared between the input and output. The input comes from the positive side of the battery, the output goes to the 5V pin on a USB connector, and the negative side of the battery along with the GND pin on a USB connector both connect to the ground. Since the 7805 drops the difference in voltage by heat, adding a heatsink to the regulator might be needed, depending on how much power your device will draw.
To connect USB devices, I need an adapter that would allow me to plug in a standard USB cable, like the one in your computer. I happened to have an old PS2/USB adapter from an old mouse. It hasn’t been used, ever, so I cut it up (the green thing above). You could use something else, like a USB extension cable which already has wires to solder to. USB connectors have 4 pins: 1) 5V, 2) Data+, 3) Data-, and 4) GND. Use some wire to solder the connections (USB 5V -> 7805 Output), (USB GND and Battery negative -> 7805 Ground), and (Battery positive -> 7805 Input). Make sure to protect the solder points with some heatshrink or risk shorting, melting, and other bad things. To connect the wires to the battery terminals, I used spade connectors. Also, leave the terminals pointing up for reasons I’ll point out soon.
Once the soldering is done, connect the battery and use a multimeter to check the output on the USB connector (voltage across pin 1 and pin 4 should be +5VDC). Then you can freely connect a USB device and you’re set. You could stop here and be done. Since I wanted this for travel and didn’t want exposed wires, I took it a step further: enter hot glue.
Clean the top of the battery and add a layer of lubricant (e.g. WD-40) to keep the glue from sticking to the battery. We want the circuitry to be detachable so that we can recharge the 6V battery using a trickle charger/car charger. This is why I left the battery terminals sticking up – so that I can freely pull the circuit away from the battery. I used about 10 – 15 sticks of hot glue used on a mini gun, just to make sure that everything would hold together. This is the most time-consuming part. It doesn’t take a lot of thought to do this. Just fill in all the holes, keeping the USB port accessible. You also want to keep the heatsink partially uncovered so that it passing air can pull away the heat given off by the 7805 regulator. You could spend a lot of time getting this pretty by squaring up the sides and making it colored, but this was a last minute project for me. Hopefully you will get some good use out of this – I know I will. I hope they don’t kick me off the train thinking it’s a bomb.
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This is amazing to charge, plug the supplied cable into the input port on the battery pack. Attach the other end, usually a standard USB, into a wall charger or other power source. Battery pack input ranges from 1Amp up to 2.4Amps. Put simply, the bigger the input number, the faster it will recharge. Cheers!
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The Most Effective Vape Juice Wholesale Distributors in the UNITED STATES
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With many individuals opting to vape, there are many vaping industries. They have a collection of various vape juices marketed in wholesale. This way, you can delight in vaping the yummy flavors. The companies are online hence you have to spend for some delivery costs. They provide in good time without any hold-ups experienced. Some are shipped the day you make the order. For other companies, you have to wait till the next day.
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What wholesale methods
Wholesale is when you get items in large quantities at a lower rate. The price is budget-friendly because you are acquiring more than one product. You get to conserve loan while you have products that will certainly last you for a while. It is the best deal for e-liquids due to the several types that you can obtain wholesale.
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Aspects that need to be taken into consideration when searching for vape juice wholesale representatives
In the United States there are several e-liquid wholesale representatives. You might obtain puzzled regarding which is the ideal one. To obtain the most effective deal, you can watch out for the adhering to facets.
– Minimum orders
At the back of your mind, you need the item in quantities. Hence, you ought to ask the minimal number to order. You can for that reason obtain worth for cash. Buying them in plenty will certainly mean that you get to pay much less.
– Flexible Prices
The cost each should be versatile. It should reflect on the number of products that you are purchasing. The cost for less products ought to be various. You shouldn’t buy at the exact same expense as those wholesale. For example, if you plan to buy 200 vape juices the device cost can be $1. Yet if you purchase 400 items, the price per unit need to be $0.50 to match the cash worth.
– Delivering Cost
Various firms will certainly bill a cost for the items to get to you. This depends mostly on the location. The costs will, as a result, vary with the company. Fortunately is that there are business that offer totally free delivery when you acquire items worth a good quantity.
Five Superb firms to obtain wholesale vape juice
Vape juice distributors ought to offer you only the most effective. This ranges from valuing to the orders that you require. The companies below will absolutely provide you adequate services.
1. Straight Vapor
The firm has a great deal to provide. Here you can anticipate performance as well as ease. When you require minimum orders you can get them at a sensible cost. You can get as numerous products as you require. Shipping fee is average, and also you won’t be charged unfairly. There is also a totally free residential shipping with the business. Brand names right here are a large choice to select from treat flavors, chocolate or coffee.
The distribution period is from 1 to 5 days depending on your location. This consists of a 15-day return policy if you didn’t like the vape juice. 60 days warranty is supplied in instance of any type of defection or replacement require develops. The distinct component about Straight Vapor is their consumer assistance solutions. They likewise reward their consumers for getting more than once.
2. Wholesale Vapor
This is the second best vape juice wholesale supplier in the US. All the vape stores can rely on the business for their products. They have matchless brand names that just match their clients. They likewise use reduced wholesale costs for vape juices. Free shipping is ensured to clients that get items from $450 price. Delivery ranges from 2 to 5 days.
3. Vapor Monster
The solutions at Vapor Beast are phenomenal. When you buy vape juices completing to $1,000 you secure free delivery. Within one to 5 days, it will be provided at your front door. You first require to use as a wholesale consumer so regarding strike a business deal. Then you can get to sample the scrumptious e-liquids they provide. You can additionally choose the pure nicotine toughness with a scale of 0 mg to 55 mg. The dimensions will certainly likewise depend on what you require. They are from 1.5 ml to 125 ml.
4. MigVapor
It is prominent to vapers throughout the globe. The vape juices are of great tastes. They additionally come in lots of range to pick from. You obtain blended vape juices from the 89 tastes. Shipping is done from 1 to 5 days of getting the item. The shipping prices are common. If you are not pleased with the vape juice, there is thirty days money back warranty.
5. Vivo Wholesale
The company has a large range of vape juice items. They are distinct kinds of juices. With Vivo Wholesale, you can place bulk orders and likewise the single orders. They deal with both large firms and also people. By opening a Vivo account, you will be ready to start putting orders. The vape juice is meticulously secured and delivered to you the 2nd day. This will take 2 to five days to receive the things.
Final thought
Vape Juice dealers have various plans. Some have minimum orders while others lack them. As a consumer, you now understand which one will certainly suit you. If you need the vape juice to market on a large scale several of them will partner will you. For those who desire the e-liquid for individual use, you can identify the best one for you. After bearing in mind the shipping problems, you recognize where to order from. With some purchase, you obtain absolutely totally free delivery.
Buying from other nations equates to high tax obligations as well as too much shipping expenses. This can be frustrating due to the costs that you will sustain.
The five representatives have pocket-friendly prices thus; you don’t need to spend a lot. You reach delight in the different charming flavors with an excellent budget. Shipment time is additionally reputable which takes at many five days.
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