7805 regulator (LM7805, TO-220)
LM7805 linear regulator · TO-220 · in 7–35 V · out 5 V 1.5 A · on a heatsink (≈ 12 °C/W)
Try it on the benchThe lab drops it on an empty bench and opens its datasheet card.
Typical part: LM7805 / L7805CV (TO-220)
Pins
- IN
- GND
- OUT
Ratings and limits
| Input | 7–35 V |
|---|---|
| Output | 5 V ±4 %, 1.5 A |
| Dropout | 2 V |
| Thermal shutdown | ≈ 150 °C |
How to use it
Fixed 5 V supply: 0.33 µF on the input, 0.1 µF on the output. Heat = (V_in − 5 V) × I, so use a heatsink or a buck module for big drops.
Lessons and builds that use it
- 12 V → 5 V regulators
- Linear supply: transformer, bridge, capacitor, regulator
- Split supply: ± rails for op-amps
- Fault-finding a linear supply
- 8. Voltage regulator: a 12 V supply and a steady 5 V (build)
- 9. Comparator: a clean decision at dusk (build)
- 10. Relay: switching a real lamp (build)
- 11. PIR sensor: only when someone is there (build)
- 12. 555 timer: stay on after they pass (build)
- 13. Buzzer: an alarm mode (build)
- 14. Solar: the light runs off-grid (build)