Editor Version ×
Standard

1.Easy to use and quick to get started

2.The process supports design scales of 300 devices or 1000 pads

3.Supports simple circuit simulation

4.For students, teachers, creators

Profession

1.Brand new interactions and interfaces

2.Smooth support for design sizes of over 5,000 devices or 10,000 pads

3.More rigorous design constraints, more standardized processes

4.For enterprises, more professional users

Ongoing

STD Improved Flashing Bike Light

License: Public Domain

Mode: Editors' pick

Cloned from Improved Flashing Bike Light

  • 420
  • 0
  • 2
Update time: 2022-02-13 21:02:57
Creation time: 2018-03-10 01:31:09
Description
An improved version of the simple 3 Red LED flashing bike rearlight. The main improvement is to use PNP transistors to make the astable multivibrator stage and then to use an NMOSFET to drive the LEDs. That way the circuit does not waste over 20mA base current in just turning a on PNP bjt every time the the LEDs are turned on. A second improvement is to use the Vishay TLCR5800 Ultrabright red LEDs: >http://www.vishay.com/product?docid=83178 >http://www.vishay.com/docs/83178/tlcr5800.pdf >http://uk.farnell.com/vishay/tlcr5800/led-5mm-red-35cd-616nm/dp/4912445 The circuit can be modified to use white LEDs by adding an extra cell to bring the battery voltage up to 6V. The circuit run at 4.5V will not drive white LEDs very well because they have a higher forward drop and so the values of R6 - R8 must be reduced with a consequent reduction in the accuracy of the current sharing between the LEDs. This may result in significant brightness variation between the LEDs in a unit and from unit to unit.
Design Drawing
schematic diagram
1 /
PCB
1 /
The preview image was not generated, please save it again in the editor.
ID Designator Footprint Quantity
1 V_3OFF_AAA_CELLS BATTERY 1
2 R1,R4 RC07 2
3 R2 RC07 1
4 R3 RC07 1
5 R5 RC07 1
6 R6,R7,R8 RC07 3
7 D1,D2,D3 LED5MM 3
8 C1 1206 1
9 C2 1206 1
10 S1 TACTILE-PTH 1
11 VILEDMON1 2P-5.0 1
12 Q1,Q2 TO-92 2
13 M1 TO-220H 1

Unfold

Project Attachments
Empty
Project Members
Related Projects
Change a batch
Loading...
Add to album ×

Loading...

reminder ×

Do you need to add this project to the album?

服务时间

周一至周五 9:00~18:00
  • 0755 - 2382 4495
  • 153 6159 2675

服务时间

周一至周五 9:00~18:00
  • 立创EDA微信号

    easyeda

  • QQ交流群

    664186054

  • 立创EDA公众号

    lceda-cn