Making USB lamp by ourselves is an fun hobby.
We learn electronics by using hands and be creative.
This circuit is good project for beginner or anyone who want to learn circuit.
This Simple DIY Guide to a USB Desktop Lamp Circuit is a useful project to learn basic about electronic.
USB lamp uses power from any USB port, so we can use it on desk, beside bed or carry outside.
This circuit shows about circuit parts, how to make and fix problem if happen.
We can also change design how we like.
After project is finished we have can have our own USB lamp and know more about soldering, circuit and electronics.
So lets start and make our idea shine through this easy to make circuit.
Circuit Working:
Parts List:
| Component | Quantity |
|---|---|
| Resistors | |
| 1/4 watt 100Ω | 4 |
| Semiconductors | |
| USB port with four pins | 1 |
| LEDs white 5mm 20mA | 4 |
| Diode 1N4007 | 1 |
Resistors R1 to R4 control how much current goes to LEDs.
100 ohm resistor is normal for white LEDs on 5V.
Diode protect LEDs when USB is unplugged.
It stops reverse power and let current go only forward.
Formulas:
In series circuit total resistance (Rt) is:
Rt = R1 + R2 + R3 + … + Rn
where,
- Rt means all resistors added together.
To find total current (It) use ohms law:
It = V / Rt
where,
- V is 5V from USB.
- Rt is total resistance.
To find current for one LED:
Iled = V / Rled
where,
- V is 5V
- Rled is 100 ohm for each LED.
Because all LEDs and resistors are in series then current is same for all.
Total current = LED current.
How to Build:
To build a Simple DIY Guide to a USB Desktop Lamp Circuit follow the below mentioned steps:
- Take all parts shown in circuit diagram.
- Connect one side of R1 to R4 to USB cable positive (+).
- Connect other side of each resistor to anode (+) of each LED.
- Connect cathode (–) of LEDs to USB cable negative (–).
- Connect diode anode (+) to USB positive.
- Connect diode cathode (–) to same point where resistors join.
Testing:
- Plug USB into power.
- If circuit is correct then LEDs will light.
Extra Tips:
- Try different color LEDs for nice look.
- Change resistor value to make light brighter or dimmer.
- More resistance means less brightness.
- We can add switch or dimmer to control light.
Conclusion:
Making Simple DIY Guide to a USB Desktop Lamp Circuit is easy and fun.
We can change design how we like.
Follow steps and enjoy bright and cool light on our desk!