Simply Transistor Tester Circuit
The circuit of transistor tester this is a fairly simple transistor tester. The circuit of transistor tester in the figure below can be used to measure and determine the pin of the transistor and determine the condition of the transistor. In addition, this transistor tester can determine the type of transistor was measured. The circuit of transistor tester was constructed with two transistors, an ampere meter are small and some supporting components. The circuit of transistor tester can be operated using a DC voltage source from a 9V battery or power supply. J1 and J2 on the transistor tester circuit is a terminal of the transistor to be tested. The circuit of transistor tester in detail can be seen in the following figure.
The circuit of Transistor Tester
Working Principle of Transistor Tester
The circuit of transistor tester is constructed of several parts:
Bias control transistor
This transistor bias control serves to regulate the provision of the transistor base bias in the test. To test NPN transistor base bias is controlled by R4 Q1 and D1. Then to test the PNP transistor base bias is controlled by R5 Q2 and D2. Bias control transistor base is basically a set amount of voltage and current to the base of transistor tested.
The socket part to put the transistor is the transistor to be tested. J1 and J2 for NPN transistor to transistor PNP in the test.
Flow Meter Transistor
A Meter in the circuit “tester transistor” is an ampere meter are functioning to display the collector current Ic in the transistor NPN and PNP transistor emitter current in the tested using a circuit of transistor tester.