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220 ohm resistor |
x 2 | |
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27k ohm resistor |
x 2 | |
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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 |
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.
Snowman Ornament
Project images are for reference only. Actual production is based on the manufacturing files on the project page.
Please review the designer's notes (e.g., PCB thickness) and select the appropriate options.
PCBWay is not responsible
for issues caused by unsuitable parameter selections.
For more important ordering information, please refer to
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Raspberry Pi 5 7 Inch Touch Screen IPS 1024x600 HD LCD HDMI-compatible Display for RPI 4B 3B+ OPI 5 AIDA64 PC Secondary Screen（Without Speaker）
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