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1 WATT LED. Very good design. Circuit takes 70mA on LOW brightness and  120mA on HIGH Brightness… | Led projects, Electronics mini projects,  Electronics projects diy
1 WATT LED. Very good design. Circuit takes 70mA on LOW brightness and 120mA on HIGH Brightness… | Led projects, Electronics mini projects, Electronics projects diy

BD139 transistor BJT NPN TO-126 buy at affordable price - Direnc.net®
BD139 transistor BJT NPN TO-126 buy at affordable price - Direnc.net®

BD139 onsemi | Discrete Semiconductor Products | DigiKey
BD139 onsemi | Discrete Semiconductor Products | DigiKey

BD139 NPN Bipolar Medium Power Transistor TO-126 Package buy online at Low  Price in India - ElectronicsComp.com
BD139 NPN Bipolar Medium Power Transistor TO-126 Package buy online at Low Price in India - ElectronicsComp.com

Use Case of BD139 and BD140
Use Case of BD139 and BD140

What is BD139?
What is BD139?

Protect power-LED strings from overcurrent
Protect power-LED strings from overcurrent

transistors - Constant current source gets heated - Electrical Engineering  Stack Exchange
transistors - Constant current source gets heated - Electrical Engineering Stack Exchange

LED Constant Current
LED Constant Current

BD139 Datasheet PDF - 100V, 1.5A, NPN Transistor
BD139 Datasheet PDF - 100V, 1.5A, NPN Transistor

BD139 and static electricity - General Electronics - Arduino Forum
BD139 and static electricity - General Electronics - Arduino Forum

Automobile White LED Light
Automobile White LED Light

Current Mirror for LEDs under Repository-circuits -47831- : Next.gr
Current Mirror for LEDs under Repository-circuits -47831- : Next.gr

BD139 BD140 Power Transistor Tutorial | How to use? | Pinout - YouTube
BD139 BD140 Power Transistor Tutorial | How to use? | Pinout - YouTube

Original Integrated Circuits Bd139 NPN Power Transistor - China Transistor  and Power Transistor
Original Integrated Circuits Bd139 NPN Power Transistor - China Transistor and Power Transistor

DC Light Dimmer using BD139 NPN transistor (0 - 38v) / maximum 3A /  Negative voltage control - YouTube
DC Light Dimmer using BD139 NPN transistor (0 - 38v) / maximum 3A / Negative voltage control - YouTube

20PCS BD139 BD140 ( 10PCS BD139 + 10PCS BD140 ) TO126 TO-126 new voltage  regulator IC - AliExpress Electronic Components & Supplies
20PCS BD139 BD140 ( 10PCS BD139 + 10PCS BD140 ) TO126 TO-126 new voltage regulator IC - AliExpress Electronic Components & Supplies

BD139 Datasheet PDF - 80V, 1.5A, NPN Transistor - ST
BD139 Datasheet PDF - 80V, 1.5A, NPN Transistor - ST

How to Make LED Flasher Circuit Using BD139 Transistor : 7 Steps -  Instructables
How to Make LED Flasher Circuit Using BD139 Transistor : 7 Steps - Instructables

transistors - Constant current source gets heated - Electrical Engineering  Stack Exchange
transistors - Constant current source gets heated - Electrical Engineering Stack Exchange

Transistor Basics | BD139 & BD140 Power Transistor Tutorial : 7 Steps -  Instructables
Transistor Basics | BD139 & BD140 Power Transistor Tutorial : 7 Steps - Instructables

BD139 Transistor NPN Bipolar Power Transistor (Original) - Electronic  Components & Robotics Parts Online Shopping In India
BD139 Transistor NPN Bipolar Power Transistor (Original) - Electronic Components & Robotics Parts Online Shopping In India

High voltage (220V) constant current LED driver using transistors -  Electrical Engineering Stack Exchange
High voltage (220V) constant current LED driver using transistors - Electrical Engineering Stack Exchange

LED Constant Current Circuit
LED Constant Current Circuit

BD139 Transistor - Pinout, Specifications, Datasheet » ElectroDuino
BD139 Transistor - Pinout, Specifications, Datasheet » ElectroDuino

Use Case of BD139 and BD140
Use Case of BD139 and BD140