Generator functions, or forms of waves, such oscillators are producing alternating voltages of different shape which correspond in appearance to a mathematical function.They can be sine, rectangular, triangular, in the form of stairs, etc.. Applied in analog and digital electronics, the measurement and experimental techniques, for educational or professional purposes and as a laboratory device [...]

Guys from Youritronics.com made a new project 74HC4051 Analog Multiplexer. They have a job to measure the temperature of 32 thermistors (NTC) with microcontroller and later process the data. With just four 74HC4051 they made multiplex 32 input channels to 4 outputs.

Nowadays is so easy to build precision digital LC meter with LCD display and microcontrollers.But, what about 1997? There is my first very precision ANALOG LC METER. Look at this, butdo not fall in love in retro princess from past!!The analog LC-meter project (AP-LC1) have more then 3% accuracy. Really!There is no balanced bridge, or [...]

Long jealously kept electricity scheme for testing electrolytic capacitors, finally the pages of the Emitters.ESR-meter (Electrolytic serial resistance), an electronic instrument for measuring the degree of freshness (dry) of electrolyte fluid in capacitors, without dislocation of the experimental component of the printed plate.The device is built in miniature version on the two PCB, in addition [...]

If you’ve ever been designing a circuit and had to experiment with different values of caps and resistors, you probably didn’t like it much. It can be a hassle to switch out components over and over, trying to find the right combination to suit your needs.  With RC filter circuits, it can be quite difficult [...]

We live surrounded by batteries. Everywhere you look there are batteries.Excessive load time can end up destroying the battery. So how do we know when fully charged? Voltage Analyzer With that we show you, this is no longer a problem.The analyzer circuit is built around an LM324 quad operational amplifier (impossible not to have a [...]

This circuit allows switching on a LED when the battery voltage (12V) drops below a certain threshold. The operating system is based on a comparison of tension, which comes in a zener diode. If the supply voltage is 12V and the zener diode is a 10V model (this is the case in the diagram), we [...]

The following construction allows a simple cable tester to determine whether the cable network is present in high-frequency signal from the source. It is a contactless version of the tester to detect the presence of a signal at distances up to 2m. It can be used to control all types of signal cables, such as [...]

This is volt meter with ICL7107(Analogue to Digital Converter). It has been designed as a panel meter and can be used in DC power supplies or anywhere else it is necessary to have an accurate indication of the voltage present. Source:macoprojects Schematic: Voltmeter with ICL7107

This simple  circuit is used to test  N-Mosfets and P-Mosfets transistors. Source: Smjesko (elektronika.ba)        Download: Mosfet Tester.rar

The ESR Meter is basically an AC Ohmmeter with special scales and protective circuitry. It provides a continuous reading of series resistance in electrolytic capacitors. It operates at 100 kHz to keep the capacitive reactance factor near zero. Source: iloveelectronic