The IC LS1240A from SGS Thompson is specifically designed for generating a 2 tone ringtone generator circuit. Thus the IC specifically becomes suitable for landline telephones for producing the ringtones […]
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2N3904 Datasheet [40V, 200 mA NPN Transistor]
In this post we learn the main datasheet and pinout details of the NPN transistor 2N3904 Introduction The transistor 2N3904 comes under the category of NPN small signal, low power, […]
AC Light Dimmer Circuit
In this post we learn through two examples how to build a simple110 V or 220 V AC light dimmer circuit for controlling light intensity with pot, using the principle […]
Simple Car Shock Alarm Circuit
A simple car shock alarm circuit presented in this article can eb effectively used to alarm the owner each time the car comes across some kind of vibrational intrusion ether […]
4 Simple VU Meter Circuits Explained
In this post we learn how to build 4 interesting VU meter circuits, using LEDs and using a moving coil meter. What is a VU Meter VU meter or a […]
How to Make a Telephone Amplifier Circuit
The simple telephone ring tone amplifier circuit explained in this article saves the inconvenience of picking the telephone handset while speaking over a call. This circuit also particularly becomes useful […]