12 volt 7 amp converter

These are used extensively as OEM regulating power supplies when 6 to 30 volts is available, and a reduction in voltage is required. They are used in heavy equipment, cell phone towers, microwave towers, and many other places. Agency Approvals ROHS, CE Isolation Non-isolated, common ground, spikes on the positive side are eliminated Non-isolated, common ground, spikes on the positive side are eliminated Dimensions x 70 x 32 mm 4 x 2.

This guideline takes this into account. Powertech 1 Powertech Plus 1. Add to cart. Store Pickup. DC speed controllers are ideal for slowing down pumps and motors or dimming lights but commonly use resistance circuits and are very inefficient.

Capable of 7A continuous output and 10A surge output. Designed for just about any modern electronic device, this adaptor will power MP3 players, games, CD players, appliances or anything else that require Handy DC voltage converter modules that can step-up or step-down voltages so you can power your devices where a different power source is present.

Maintenance Tips. Car Review. Car Comparison. Industry knowledge. Last updated Jan 25, Photo Source: car The Ampere rating is the battery operation threshold that gives an estimation of the battery charge.

Does Gasoline Freeze? At Which Temperature? For example, you need to calculate the amp hours in a CCA battery. One straight formula is: Ah x 7. Ah value indicates how long the battery will run. Photo Source: practicalmotoring The Final Words Even if there is no direct association between these two values, you can convert the values between each other, if necessary.

If you add a transistor in the circuit. It will increase a higher current more. But the output voltage is 4. Because of some voltage drop across BE of transistor Q1, 0. We need to change the Zener diode is 5. You can add a diode and the Zener in series. You can get them like 5. Since a transistor is good to increase the current. So, we can change R1 to be 1K as circuit below. To reduce a bias current Zener diode and the Base of Q1.

If you use 2N instead of BC It can use mA load. Because 2N has a current collector Ic of about 0. But in real using it can use max 0. It has Ic about 2A max in spec. But I can get it about 0. While it is working. It may be warm. So often perform better with a heat sink. I use TIP41 power transistor. Because it can get 4A max in spec. But in real using it can give me about 2A max only. Also, its body is TO so easy to use with any size heatsink.

Second, Regulator popular. This is so easy, faster than other. Because its body is the same as TIP41, without Zener diode and a bias resistor. Also, it has low ripple output about 10mV, with the electrolytic capacitors C1, C4 on the input and output. And both filter capacitor, C2, C3 to reduce the spike voltage.

Note : pinout. Since it is the linear regulator. So while it is working. There is the voltage across input and output of IC1 about 7V. When full load has a current of 1A. So the output power is about 7 watts. It is hot. We should mount it on enough heatsink.

If we connect in parallel. It makes higher current more. This is suitable for who carry up or do not have any power transistors. I use the power supply with the 12V battery. To reduce the constant voltage of 5 volts. I try to use the load is 4. I measure the current of about 0.

As Figure 1. Testing pure IC not over 1A current. I use the TIP41 transistor. In principle, it can supply the current about 2A. Which it is enough to use.

Then, I test the circuit with about the load, 2. Next, measure current approximately 1. It can be used as we want. We insert LED1 to indicated power on of this circuit and a series resistor-R1 is used to limits current to a safe value. C1, C3 is filtered capacitors to smooth dc current input and output sequence. C2, C4 is noise filter spark current.

Note: It has cons. If it short circuit. IC may be damaged. If you want the current more than 1A using in better than 2 circuits above. It needs helping from a power PNP transistor, with circuit below. The high current will flow through the power transistor Q1, TIP While gets lower current.

Because R1 reduces this current down. Although this circuit can be used well. But it still has disadvantages. When a short circuit, the power transistor may be damaged. Or If you have another one, TIP You can add it in parallel. The output current will be up to 5A, too. The digital camera can take pictures and videos as well.

But it has a disadvantage is not long the battery runs out. When using outdoor.