Desauty Bridge with Null Detector and oscillator

This bridge is used to measure the unknown value of capacitance. The instrument has following in built parts fitted in ABS Plastic case. 

AC Source :The Bridge consist of sine wave signal of 1KHZ. The Amplitude of AC switch indicating lamp is provided on the bakelite board. Two sockets are provided for the output of AC signals.

Detector :For detecting small AC signals in the output, Null Detector is in-built with digital display .

Circuit Diagram :The circuit layout on the board is quite spread out to facilitate convenient working & clear understanding. 4mm socket are provided for making connection. 

Features:
R2 --- Three decade resistance dials having value 10X1000, 10X100 and 10X10  ohms

R1 ---- Single decade resistance dial having value 10X 100 ohms

C1 ---- Unknown capacitor.

C2 ---- Two fixed standard capacitors having value 0.01mf & 0.1mf (loss free)

Terminals are provided for external connections to connect unknown capacitor.