Modules
LM7805 Voltage Regulator (TO-220)
৳20
Linear regulator giving a fixed 5V output from a higher DC input, in a three-pin TO-220 package.
It is the simplest possible way to get a clean 5V rail: input, ground, output, two small capacitors and nothing else. The trade-off is that the excess voltage leaves as heat rather than being converted.
What you can build
- A 5V rail for logic from a 9V or 12V supply
- Battery-powered projects running off a 9V cell
- Bench power for breadboard circuits
Not sure it will work? Test your circuit free in Tekko Sim — on your phone, in Bangla or English.
| Category | Modules |
| Model no. | LM7805 TO-220 |
| Availability | In stock |
| In stock | 20 pcs |
| Delivery | Cash on Delivery, nationwide Bangladesh |
| Output Voltage | 5V, typically within 4 percent |
| Input Voltage | 7–35V DC |
| Maximum Output Current | 1A with an adequate heatsink |
| Dropout Voltage | roughly 2V |
| Package | TO-220, three pins |
| Protection | internal thermal shutdown and current limiting |
Questions about the LM7805 Voltage Regulator (TO-220)
Does it need a heatsink?
That depends on how much voltage you are dropping. The part burns the difference off as heat, so 12V in at 0.5A means about 3.5W to dissipate and definitely needs one. From 7V to 9V at low current it is fine bare.
Which capacitors should I add?
Around 0.33 microfarad on the input and 0.1 microfarad on the output, mounted close to the pins. Without them the regulator can oscillate.
Can I get 5V out of a 6V supply?
No. It needs roughly 2V of headroom, so the input has to be at least 7V. If your input sits close to 5V, use a buck converter or a low-dropout regulator instead.
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