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Category: Meter Counter Circuits / Meters Circuits Views: 4100 Rank: 0 Many times we have found itself in the necessity to use a Zener diode and cannot to know the voltage of operation. Many times we cannot read the characteristics or the type that is written on her. In this case, but in different we can also use the circuit of Fig.1. The T1, D1 and C1 they constitute a system of half-wave rectification. If push the switch S2 a DC current passes in from current limiter Q1 and the diode Zener DZ which we check. Q1 stabilizes the current in the price of 10mA independent from the zener voltage that we have connected in the connector J1. In the connector J2 we connect a digital voltmeter. There we see the voltage in the zener DZ. The circuit is reliable for measurements down to 25Volts. You have clue of low voltage 0.8Volts likely the diode DZ, is connected reverse. Change the polarity of diode DZ. Q1=2N5363 [N-Channel JFET] S1=ON/OFF SW For 230Vac 1A DZ=Diode Zener Under Test D1=1N4002 S2=Push Button Switch [Normal Open] D.V.M=Digital Volt Meter C1=470uF 50V T1=230Vac//12Vac 300mA Transformer J1-2=2pin conn. with 3.96mm pin step visit page.  Q1=2N5363 [N-Channel JFET] S1=ON/OFF SW For 230Vac 1A DZ=Diode Zener Under Test D1=1N4002 S2=Push Button Switch [Normal Open] D.V.M=Digital Volt Meter C1=470uF 50V T1=230Vac//12Vac 300mA Transformer J1-2=2pin conn. with 3.96mm pin step http://users.otenet.gr/~athsam/Diode_zener_tester.htm
Related circuits This tester is for tracing wiring on Printed Circuit Boards. Resistors below 50 ohms act as a short circuit; above 100 ohms as an open circuit. The circuit is a simple multivibrator switched on by transistor T3. The components in the base of T3 are Dl, Rl, R2, and the test resistance. This circuit is designed around a 4049 hex inverter/buffer. Two inverters are used ina dual-frequency signal-injector circuit, another inverter is used as a logic probe, and the remaining three inverters are used as a sensitive dual-input, audio-signal tracer. The signal-injector portion gates... Ll and L2 form a tuned transformer. About a 1:3 turns ratio is optimum. L2 and CI tune to the desired frequency. The fre In this application, the ICM7249 is configured as an hours-in-use meter and shows how many whole hours of line voltage have been applied. The 20-MD resistor and high-pass filtering allow ac line activation of the SIS input. This configuration, which is powered by a 3-V lithium cell, will... This Field Strength Meter is simple and also quite sensitive. It uses an ordinary digital voltmeter to measure RF signal strength up to a few hundred MHz. The multimeter should be set to the lowest dc volts range for maximum sensitivity. This is normally 200mV DC for most meters. The circuit... After one has built a QRP transmitter, it would be interesting to know the exact amount of output power. Without a power meter the peak to peak voltage Vss is measured at an 50 ohm resistance (dummy load) with the available oscilloscope. Now the power rate can be calculated according to the... The integration circuit can be simplified like shown in the circuit diagram. The threshold voltage is generated by divider registers. It seems not stable to valiation of supply voltage however the charge time is not affected by the supply voltage. You will able to find that voltage terms can be... The equivalent series resistance (ESR) of a capacitor can be measured using this circuit and an ac voltmeter. Ul fun
Articles & Projects
This is a circuit for is a handy zener diode tester which tests zener diodes with breakdown voltages extending up to 120 volts. The main advantage of this circuit is that it works with a voltage as low as 6V DC and consumes ...
Simple Zener Tester Schematic. The circuit can be simply Q1 is connected as a current source. By D1, there is a constant voltage on the base, and it is worth considering the selected resistor in the emitter approximately 5.6 V.
Using electronic scheme below can be designed a zener diode tester using few electronic parts. Using this zener tester and a multimeter can be measured and determined with a high precision threshold voltage of a zener diode.Zener voltage ...
Description. Here is a very simple circuit that can be used for testing Zener diodes. The IC1 NE555 is wired as an astable multivibrator and the output of the IC is stepped up to a high voltage AC using the transformer T1.The unloaded AC ...
The diode tester in this web site is specially designed for the zener diode and PN diode. You can use this circuit for testing of zener diode. More about you can get more than 300+ electronics projects here.
Make a simple tester quickly before making a circuit and use it to check Diodes, LED, IR LED, Photodiode, LDR, Thermister, Zener diode, Transistor, Capacitor and also to check the continuity of fuses and cables.
zener diode tester project circuit
13 More About Diodes including Zener Diodes
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