circutes

Circuits.
The circuit comprises signal amplifier and analogue display circuits. Voltage variation from the sensing pads are amplified by the transistor BC548(T1), which is configured as a common-emitter amplifier.The base of T1 is connected to one of the touch pads through resistor R1 and to the ground through potmeter VR1. By varying VR1, the sensitivity of T1 can be adjusted to the desired level. Diode D1 maintains proper biasing of T1 and capacitor C1 keeps the voltage from the emitter of T1 steady.

The amplified signal from transistor T1 is given to input of IC LM3915(IC1) through VR2. IC LM3915 is a monolithic IC that senses the analogue voltage levels at its pin 5 and display them through LEDs providing a logarithmic analogue display.

increse BSNL speed

Increase Speed of BSNL Broadband connection
Setting DNS For Your Connection
One of the major problems with BSNL Dataone Broadband connection is the DNS servers they provide by default. Most of the time they are very slow and sometimes they fail to respond. I noticed that I am starting to spend a significant amount of time in DNS resolution with Dataone connection, often it is larger than the time it takes to actually get the reponse. Here is a simple solution to significantly speed up your DNS resolution.

Open up the network connection profile and edit TCP/IP settings. In the DNS server address fields, specify the following DNS server addresses: 208.67.222.222 and 208.67.220.220
Disconnect the connection and then connect again. You are done.

This specifies third party DNS servers which are significantly faster than BSNL Dataone’s DNS servers.

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