measuring constant voltage value of 100 V. It is produced by the bridge circuit for the transistors T1 and T2. In one diagonal bridge included a measuring device in the other power source.
Adjustment of the voltmeter consists of two stages. First, changing the values of resistors R4 and R5, to achieve the equality of voltages at the collectors of transistors T1 and T2. Then use the variable resistor R6 set the arrow of the measuring device to zero.
Measured the voltage across the resistors R1, R2 and R3 is supplied to the base of transistor T1. This disturbed the balance of the bridge, and through the milliammeter begins to flow the current proportional to voltage.
Resistors R1 — R3 select with an accuracy of ±5%.
This scheme can be used as a prefix to the avometr with low input resistance.
Recommend to read
STIRLING ENGINE
The Stirling engine is a heat engine invented by Robert Stirling in 1816. It differs from the internal combustion engine because the fuel burns outside the engine, making it much...
SHELF STAND
Now even at primary school pupils the abundance of tutorials and various secondary sources. So the books were always at hand and at the same time did not create the mess table, make this...
