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

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

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

LED Constant Current
LED Constant Current

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

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

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

BD139 - NPN TRANSISTOR - Electronation Pakistan
BD139 - NPN TRANSISTOR - Electronation Pakistan

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

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

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

arduino - Replacing BD139 for TIP122 - Cooler speed control circuit -  Electrical Engineering Stack Exchange
arduino - Replacing BD139 for TIP122 - Cooler speed control circuit - Electrical Engineering Stack Exchange

LED Constant Current Circuit
LED Constant Current Circuit

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

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

Buy BD139 Medium power NPN transistors box of 2000pcs
Buy BD139 Medium power NPN transistors box of 2000pcs

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

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

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

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

Bd139 Pinout: The Only Comprehensive Technical Guide You'll Ever Need
Bd139 Pinout: The Only Comprehensive Technical Guide You'll Ever Need

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

BD139 NPN Power Transistor - Datasheet
BD139 NPN Power Transistor - Datasheet