Small Bell Sound Kit
SKU
FK251
In stock
$2.25
Overview
This kit is a sound generator kit with the sound of a small bell.
Technical specifications:
power supply: 6-12VDC.
consumption: 15mA max.
dimensions: 1.55 x 1.24 inches
How it works:
Multi-vibrator (TR1 and TR2) is configured as low frequency generator.
TR1 and TR2 will alternate one by one.
If TR1 works, LED1 will light.
But if TR2 works, LED1 will turn off
TR3 generates high frequency (2KHz).
This high frequency is driven to the piezo speaker.
The low frequency is dependent on R1-R4, C1-C2.
R1 is voltage drop for LED.
The frequency of the tone is set by the value of C3.
If you increase the capacitance C3 will produce a lower, longer note.
Validate your login
Sign In
Create New Account