Themodule can be powered by one of two ways: Separate power source. Power from Arduino. You can choose the power source from the DIP switch beside the Antenna. Typically, the module has its own power socket. So you can power it from a separate power supply of about 12V/1A or 5V/2A. Themain objective of our 12V power supply circuit is to control the voltage and current for the battery so that it can be charged in the best possible way. For this purpose we have used two LM317 ICs, one is used to control the voltage and the other is used to limit the current. Here, in our circuit the IC U1 is used to control the current and ONLYFOR 12 VOLTS. this 12 volt 1.5 amp power supply can also perfectly replace 12v 800ma and 12v 1a transformer adapters and only applicable to 12v electronics with no more than 18w, such as led light strips, desk lamp, aquarium lights, CCTV, camera monitors etc. 100V-240V AC to DC 3V~12V Converter 0.5A 1A 1.2A 1.5A 2A 2.5A Max with 14 Tips. Allthese systems usually operate on 12V, and can easily be connected to a 12V UPS. I'm building an ups with two 12v/7ah SLA battery supplying 12v/2a for 1 modern, 5v/2a for 1 camera, another 12v/2a security panel. Should I connect the batteries in series or parallel. When drawing 1A, this voltage will reduce to 12.6V. The ideal load Arkare30W Universal AC to DC Power Adapter Adjustable Power Supply 3V 4.5V 6V 9V 12V 2A 1A DC Adapter AC 100-240V to DC 3-12V Multi Voltage Switching Power Adapter with 15 Tips + Polarity Converter. 4.4 out of 5 stars 113. $19.99 $ 19. 99. FREE delivery Fri, Sept 29 on your first order. Whatwill happen if I use a 13.5VDC 1000ma on a 12V 2A device? - Quora. MiniUPS Battery Backup Uninterruptible Power Supply for Router, Modem, Security Camera, Built-in 10000mAh with Input AC Output USB 5V DC 9V/12V 2A Gigabit POE 24V/48V (1000Mbps) 889. $5499. FREE delivery Thu, Sep 28. Or fastest delivery Wed, Sep 27. 12V5V power supply circuit using 7805 and LM7812. Look at the circuit below. This can deliver DC voltage of 5V and 12V at 1A. Since the CD-ROM drive is electronics part that required a regulated power supply. So, we use a 3-Terminal 1A fixed-voltage integrated circuit,7805 and 7812. Thesimplest circuit will be using a voltage regulator like LM7805. These regulators are very common. However, it can only supply a maximum current of 1A and you will also need a heatsink. It is simple to build: connect the 12V wire at the left most terminal of the IC, while looking at the inscription and with the pins down. 1 For flooded lead-acid batteries, it is generally recommended that you not charge at more than 20 - 25% of the Ampere-hour rating - for your 12 Ah battery, that would be about 3 Amps. Gell and AGM batteries can often be charged faster than flooded types, but you should check the manufacturer's recommendations. Share. hlpg.