Components
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MMBT3904 |
x 13 | |
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MMBT3906 |
x 13 | |
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LED 0603 |
x 9 | |
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Capacitor 0603 10uF |
x 3 | |
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Resistor 0603 1Kohm |
x 2 | |
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Resistor 0603 10Kohm |
x 1 | |
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Resistor 0603 100Kohm |
x 3 | |
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Resistor 0603 100ohm |
x 1 | |
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Resistor 0603 15Kohm |
x 1 | |
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Resistor 0603 220ohm |
x 3 | |
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Resistor 0603 3.9Kohm |
x 1 | |
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Resistor 0603 4.7Kohm |
x 7 | |
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Resistor 0603 6.8Kohm |
x 1 | |
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Resistor 0603 820ohm |
x 1 | |
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CR2032 Battery Holder |
x 2 |
Description
Discrete 555 Blinky Xmas Tree
Xmas tree that creates a 555 timer from transistors and resistors and configures it as an astable multi-vibrator to blink some LED's.
Should be powered through 2x CR2032 batteries or through the pins at the bottom. Works between 4V to 15V, but may need higher value dropper resistors for the LED's when powered by more than 6V.
A great way to learn soldering some pesky SMD components, mainly 0603 sized resistor, capacitors and LED's and SOT-23 sized transistors.
This circuit has not yet been tested, but should work as it's based on a working model.
Schematic and Layout
https://hackaday.io/project/176177-discrete-555-timer-blinky-xmas-tree
Dec 05,2020
1,187 views
Discrete 555 Blinky Xmas Tree
Blinky Xmas tree made with 9 LED's and a 555 in discrete form.
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Published: Dec 05,2020
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