IC555 Tester Circuit

Complete circuit tester 555 as follows.

555 timer tester is a simple circuit that serves to test the condition of IC 555. 555 timer circuit tester, in principle, start the timer 555 in astable multivibrator mode. As an indicator of the status of the timer 555 good condition or damaged to use 2 pieces LED which will light up in a blink alternately when the timer 555 in good condition. And only one will turn on or off all the timer 555 when the condition is broken. 555 timer circuit tester is powered using 9 Volt DC voltage source.

How to use 555 timer tester is in conjuction with IC 555 to test the existing IC socket according to the order button. Then activate the power switch to begin testing the 555 timer ic. Then live we observe the LED indicators 2buah before, whether flashing alternately (good) or not blink or even die all (timer 555 damaged).

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10Hz - 60Mhz Frequency Meter

The frequency meter can be used to measure the frequency of 10 Hz-60Mhz. The frequency meter has a level of precision or resolution of 10Hz. The frequency meter can be used to measure the frequency of the oscillator, transmitter, frequency generator, cristal, and others during the working frequency trsebut devices in the range 10 Hz - 60MHz. Circuit frequency meter using PIC 16F628A dibagun and with the viewer of the LCD 16 × 2. Frequency meter circuit is working with the working frequency of 4MHz crystal. The series is an electronic frequency meter is quite simple to make. The following picture of the frequency meter circuit.

The series of frequency meters above basically works with the source voltage 5VDC. In this series of 7805 voltage regulator has been installed, so it can be operated with a voltage of 5 - 15VDC.

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PIC Volt and Amere Meter Circuits

Volt meter and ampere meter with PIC can be used to measure voltage and current at the same time. The series of volt meter and ampere meter with PIC uses a PIC16F876A as a data processor voltage and current are measured. This circuit uses a LCD viewer 16 × 2, which is used for displaying data voltage and current measurements. In the article volt meter and ampere meter with PIC is to be discussed is limited to devices faucet only. For more details can be seen from the image sequence volt meter and ampere meter with PIC below.

In the circuit volt meter and ampere meter with PIC above used 3 pieces of buttons for setting Calibration measurement data. The circuit is basically working with the source voltage 5VDC.

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Digital Volt Meter Circuit

Digital volt meter circuit is simple and not much use of additional components. Volt meter circuit uses IC L7107 as a main actor. L7107 IC is an Analog to Digital Converter (ADC) which has been equipped with the viewer seven segment driver 3 1 / 2 digits. IC L7107 in the application of digital volt meter is in it has been equipped with an internal voltage reference circuit, analog switches, sequential control logic, and LED display driver. This digital meter volt circuit can be operated with a working voltage 5VDC. A full suite of digital volt meter can be seen in the following figure.

To set or Calibration to 0 Volt. done by adjusting the VR 2KOhm. then to test the display can be done by pressing the test switch, where to normal conditions when the switch is pressed then all the display lights up.

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