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Components
|
220 ohm resistor |
x 2 | |
|
27k ohm resistor |
x 2 | |
|
2N222 NPN Transistor |
x 2 | |
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Slide Switch DPDT 5mm width |
x 1 | |
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91uF electrolytic capacitor |
x 2 | |
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D5mm Green LED |
x 3 | |
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D5mm Red LED |
x 4 |
Description
Snowman Ornament
This project utilizes a basic circuit, the astable multivibrator to flash green and red LEDs on the charging and discharging of the two capacitors. To have a faster frequency lower the capacitance and inversely for a lower frequency blink. The slide switch is used to easily turn the ornament on or off instead of disconnecting a 9V battery. Through testing it was found that the max amount of green LEDs could be 3 and 4 red leds, of course there are ways to optimize this.
Nov 29,2019
694 views
Snowman Ornament
A snowman shaped ornament to hang on the tree, uses a simple astable multivibrator to blink red and green LEDs using a 9V battery for power.
694
0
0
8.50 (1)
Published: Nov 29,2019
Download Gerber file 6
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