Battery power tester ----- Battery Tester

Battery power tester, Battery Tester Keywords: battery power tester Battery power tester Measuring the electricity of the dry battery is necessary to pick a load resistance on both ends of the cell to make it measured in the discharge state. The drawings are circuit diagrams. The operation is placed in the form of a voltage follower, and the VO = Vi, that is, the output voltage is equal to the input voltage. When the dried battery is connected to the tester 1, 2, the battery is discharged by the resistor R1, and the discharge current is about 60 mA. At the same time, the voltage applied to the positive input of the A1, then VO = Vi, the voltage is applied to the voltage gauge V by the diode VD2. Since VD2 generates a voltage of about 0.6 V, this will cause the voltage meter voltage to be low. On a diode VD1 on the amplifier negative power supply to counteract the error of the VD2 pressure drop. Similarly, when the 1.5V button battery is measured, the battery picks up the 2, 3 terminal, the voltage applied to the positive input of the A2, and can also measure the power of the battery on the voltmeter. When you want to measure the 3V button battery, the battery picks up 2, 4 terminals. The 3V voltage passes through the partial voltage of the battery voltage to the positive terminal of the A2 through the partial pressure of R2 and R3, and the voltage meter display voltage is half the battery voltage, but it can also measure the amount of power. VD2, VD3 in the circuit is the isolation diode of A1 and A2. R4 is a voltage balancing resistor, and the effect is the same as the diode VD1 flows through the current and VD2, VD3. LED is used to work instructions. The tester consumes approximately 5 mA.

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