4.5V is 50% over 3V. Circuits are not usually designed for that much over-voltage. If it is intended to run off two AA batteries, there is no need to anticipate any voltage higher than 3V. Even if it seems to be working at the higher voltage, components could be stressed or overheating.
How do I convert 5V to 3V?
The simplest possible step-down circuit is a resistive divider. Drive your 5V output into a chain of resistors, from which you tap your 3.3V logic input. A chain consisting of a 2.2k and a 3.3k resistor should produce a 3V output from an applied 5V input.
Can I use 5V adapter for 4.5 V device?
I’ve run many 4.5v devices off a 5v USB power supply without problem. Most devices can tolerate it fine, because a brand new AA battery can deliver in excess of 1.6 volts, so the device is designed with some leeway.
How do you make 4.5 volts?
Making a 4.5 Volt Battery Pack From a 9V Battery
- Step 1: Dismantle Your 9V Battery. This is your chance to be destructive.
- Step 2: Separate 3 Batteries and Tape Them Up. Next you want to seperate a set of 3 batteries, ensuring that they stay connected to each other.
- Step 3: Add 2 Leads.
- Step 4: Tape the Whole Thing Up.
How do you reduce voltage from 6v to 3V?
For AC source : Use a step down transformer ( I hope you know what that means). As the name says it brings down the given voltage (6v) to a desired level of voltage (3v).
- The best way to do that is to use a 7805 voltage regulator.
- Use a zener diode.
- Use a voltage divider circuit V1=V(r2/(r1+r2) ) and V2=V(r1/(r1+r2))
How do you reduce 5V to 3V DC?
You can use a pot (potentiometer), a Zener diode, a combination of s transistor and diode, or a combination of resistors of appropriate values to reduce voltage from 5 V to 3 V.
How do I reduce 5V to 3.3 V?
Method #1 – Voltage Divider
A voltage divider is a simple circuit which reduces a large voltage into a smaller one. Solving the formula above with Vin=5V, R1=1000ohms and Vout=3.3V.
Can I use a 5V adapter to power a 6V device?
The short answer is No. A 5V, 2A adapter gives 10W of power and the 6V,1A gives only 6W. That is only scraping the surface. Transistors are present in almost every electronic device today.
Can I use a 12V power supply on a 5V?
The device will very likely burn out. In addition, depending on what the device is and the capacity of the 12V supply, connecting a 12V supply to a device rated 5V max could lead to a hazard – fire, explosion, etc. Mostly it will get damaged.
What is 5V 500ma?
It’s the current rating which is responsible for charging time of a battery. Also, 5volt, 1000mA can provide maximum power of 5 watts (ignoring the losses) whereas 5 volt, 500 mA can provide a maximum of 2.5 watts. By using 500 mA charge, battery will take double time to recharge itself as compared to 1000 mA.
What is a 4.5 V battery?
Zinc-carbon 4.5V battery is commonly labeled as 3R12 battery and is used as a cheaper alternative to the alkaline 3LR12 battery, especially for low drain devices.Also, the shelf life of zinc-carbon batteries is rarely longer than 2-3 years, while alkaline batteries can have a shelf life of up to 5-7 years.
Can I use 9v battery for 5V?
A 9v to 5v voltage regulator can be implemented with an LM7805 step-down voltage converter. It is used for (10mA to 1 Amp and more) medium to a high current application. The unique about this circuit is its ability to provide the same output current as applied at the input end.
What resistor do I need to drop 12V to 3V?
take a 12v 4ohms potentiometer where the pointer will be adjusted at 3 ohms so that the voltage at last 1 ohm will be 3v. use a resistor in series with a 3 V zener diode to ground.
Can I use a 3.7 V battery instead of 3V?
Yes, a 3.7V Lithium-ion Battery can be used in place of two 1.5V cells. The two 1.5V cells are connected in series in the remote control of an RC car equals 3V (1.5+1.5 = 3).
How do you convert 5V DC to 3.3 DC?
You can use any 3 resistors with same value connected in series to 5V and take voltage from 2 of them. So it will be 2/3 from 5V = 3.333V – very close to 3.3V.
How do I reduce 3.7 V to 3V?
By using a step-down buck converter, the 3.7V can be brought down to 3V. But beware of the current that is running through the circuitry in the car. By using a buck converter with a 5Amp current rating, the current will be constant and the car will not be damaged.
Do resistors increase voltage?
A resistor, by itself , can never increase voltage. It can either have zero drop or some drop in voltage. the only way a higher voltage can be seen across a resistor is if another current source from a higher potential is present at that junction.
How do I amplify 3V to 5V?
The main ways to interface a 3.3V output to a 5V input are:
- Direct connection.
- Using a 74HCTxx gate (or other 5-V TTL-input compatible families)
- Using a diode offset.
- Resistor Offset.
- BJT/MOSFET inverter.
- Series MOSFET.
- Series BJT.
- Level Translator IC.
What resistor do I need for 3.3 V?
If your LED takes 100 mA at 3.3 volts (for instance) you would need to drop 1.7 volts from 5 volts with a resistor. That means a resistor of value 1.7 volts / 100 mA = 17 ohm.
Can I use a 5V charger with a 3.7 V battery?
The battery is charged by this method and the battery status needs to be monitored at all times. Lithium battery with protection circuit board can be charged with 5V voltage(4.8V to 5.2V can be used). For 3.7V lithium batteries, the charge cut-off voltage is 4.2V and the discharge cut-off voltage is 3.0V.
Can I use 7.5 V adapter for 6V?
No. The supply would not be able to provide enough current and would likely overheat.
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