analog frequency meter circuit diagram
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measuring inductance
Pick whichever circuit is better for you, but the one using the LM339 is better. Both the capacitors are 1uf metalized film, but anything that is non polar will...
inductance meter adapter circuit
This is a design circuit for measure inductance of the inductor labeled LX which is the inductance to be measured. The o/p of the circuit is a TTL square wave w...
digital led voltmeter circuit
This is a design circuit for digital voltmeter with LED display. It`s ideal to use for measuring the output voltage of your DC power supply. It includes a 3. 5-...
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This is a design circuit for digital voltmeter circuit. The integrated circuit ICL7107 is a 3-1/2 digit LED A/D convertor. It contains an internal voltage refer...
converter voltmeter to frequency meter
This is design circuit for converter meter voltage to frequency. Normally we often encountered the frequency meter can be used in speed sensor, tachometer, meas...
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This a application circuit for calibration. This circuit is called high voltage AC calibrator circuit. In another dimension in sine wave oscillator design is st...
audio frequency meter
This is a circui for audio frequency meter. This circuit uses 555 IC as a mono stable multi vibrator (one-shoot trigger). A mono stable multi vibrator can act a...
android bluetooth oscilloscope
The transmitter circuit uses Microchip`s dsPIC33FJ16GS504 for the analog-to-digital conversion of the input signals on two channels. The processed data on the d...
how to make digital voltmeter
This digital voltmeter is ideal to use for measuring the output voltage of your DC power supply. It includes a 3. 5-digit LED display with a negative voltage in...
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A signal-injection circuit for control-loop analysis is flat from dc to 200 kHz, isolated from chassis ground and easily constructed with a readily available in...
single phase energy meter circuit diagram
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centigrade and fahrenheit scale digital
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lcd oscilloscope for spectrum analyzers using pic16f876a
1. Spectrum-analyzer project 2007 update Since the development of the wide-band VCO almost 10 years ago, the whole spectrum-analyzer project with all relat.....
Light Bulb Pirani Gage Project
The principle is that the resistance of metals increases at higher temperatures and a heated wire suspended in a gas will lose heat by conduction and convection...
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This is an early test program (assembly source code), which was stored on the erasable programmable memory chip (EEPROM). Assembler programming is just 1 step a...
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The information here is primarily intended for home brewers that want to build the analyzer or want to design their own based on the principles of the design. I...
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This is a circuit to test zener diodes. It hooks up to a 120V AC line and boosts the output voltage to over 300V allowing you to test zener diodes of any voltag...
nixie clock
One of the many random devices I`ve found in my sometimes frightening basement was an HP frequency counter. The thing is built like a rock, still works perfectl...