12/10/2023 0 Comments Make your own light table3) You can use different types of batteries like lithium ion or lithium polymer which will make it lighter and better. 2) You can use different types of leds like 1 watt, 3 watt or 5mm ones which have lens to focus the light on a small area. Increasing them would decrease the battery life and decreasing them would decrease the amount of light but the battery would last longer. Here are some modifications to make it better- 1) You can increase or decrease the number of leds. Feel free to modify the lamp to give better results. Please vote for it in the contest if you think it is a winner. So this is the end of my second instructable. To charge the lamp, simply connect it to any 9v adapter, the charging led would illuminate indicating that the battery is charging. Make sure you solder the batteries quick as overheating them can cause problems. This is done to increase the battery life but 4v is not enough for powering the lamp so I have connected them in series. Connecting the battery in series increases the voltage (that means the resulting voltage is the sum of the voltage of both the batteries) while connecting them in parallel would increase the life or current. Then finally solder two more wires to the remaining terminals of the battery. Using lithium-ion, ni-cd, alkaline, or any other type of battery would highly increase the total cost of the lamp but they would be good choice if you want your lamp to last longer.įor assembling the battery back simply stick both of the batteries using double sided tape and connect them in series that means connect the positive terminal of one battery to the negative terminal of the other battery. The good thing about them is than they can simply be connected to an adapter for charging and they do not allow any special chargers. Then the question comes about the type of battery to use, lead-acid should be the best option if you want your lamp to be as cheap as possible. I used 4v batteries as they are the cheapest available batteries ($1 each) and having two of them would produce 8v which is enough to power the lamp. So you can use a 6v or higher voltage battery but it should not exceed 12v as the voltage regulator would get too hot. Powering it on a voltage less than 5v would lower the brightness of leds. The power supply that is needed to power this lamp should be greater than 5v. 1x TIP 31c or any other npn power transistor.2x 4v 1.5ah sealed lead-acid re-chargeable battery.If you don't want to add the dimmer circuit, the cost will be reduced to $4.5 (according to cost of parts in India). The cost depends upon the website or store you buy the parts from. The total cost including all the parts listed below (not the tools) is about $5-6 or 300 INR. The Fall 3D Printer and Electronic Tools Promotional SaleĬrealit圓D CR - 10 3D Printer (coupon: GBCR10J) $396.99įor making this lamp you will need the following parts. Get the best of the parts at reasonable rates from GearBest.Īlso, have a look at their ongoing sales: My email address is: more such awesome DIYs, subscribe to my YouTube channel. It's not easy to reply to each and every comment on so many instructables, so you can ping me for any assistance/discussion/query. Although I have made a detailed guide and ensured that it can be easily understood by a beginner but if you have any questions related to the instructable, feel to ask anytime and also help me to make corrections if I've done any mistakes. The lamp can be recharged by using a 9v adapter. It also has a dimmer circuit that is powered by a 555 ic and is used to vary the brightness of the lamp by adjusting a potentiometer. This is powered by two 4v sealed lead acid re-chargeable batteries and has 36 LEDs which produce enough light to easily read in darkness. No wood, plastic or acrylic is used to make it so you don't require special cutting tools. You may have seen many instructables on led lamps but the special thing about this lamp is that it is very cheap as it uses a stainless steel ruler and cardboard for making its structure which most of the people have lying around. So making them at home would pass your time and also save money as it would cost only around $5-18. What if you would make one at home? Well, it can be easily made with some cheap and basic electronic parts. LED lamps are much cheaper and energy efficient but still buying them from internet and shops costs more than $10. CFL lamps are the most commonly used table lamps but the problem with them is that they take too much power and they need to be plugged to an external power supply. People use them for reading and studying. Desktop lamps are very useful and present in every person's house.
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