This article describes the Battery Desulphation Progress Monitor (UF4004). The principle is very simple, very practical. The circuit components can hel...
Description: A remote listening circuit. The area to be monitored is connected via a cable and allows remote audio listening. Circuit Notes You can use...
This article describes the Supply Voltage Monitor (TIL209). The content is very simple, very helpful. Components in this article can help you understan...
Switching diodes are used to fire the neon lamps when negative-peak modulation hits 50. 60, and 100%. To use the circuit, keep an eye on the lamps. You...
This article briefly describes the VGA Monitor Splitter and Extender (2N3906). Although this circuit is very easy to understand, but also very practica...
Flow R1 inductive power of the current. The JFET is used as a buffer, because the ID = Is output detection voltage accurately reflect the supply curren...
View Full Size Image View Original Design Note This circuit shows a differential load measurement for an ADC using twin unidirectional sense measuremen...
This project was born for repairing broken PC monitors. This allows to avoid using a computer while testing monitor patterns. The Tiny monitor tester u...
View Full Size Image View Original Datasheet The LTC2990 is used to monitor system temperatures, voltages and currents. Through the I2C serial interfac...
This monitor uses a common 7 41 amp configured as a comparator and a low cost nontransistor as an output driver. With no liquid detected, a voltage of ...
This article describes the Shortwave Monitor (LM386). The principle is very simple, very practical. The circuit components can help you understand bett...
This article describes the fuel injector pulse width monitor (CA3035). The content is very simple, very helpful. Components in this article can help yo...
Description Almost all 24V power systems in trucks, 4WDs, RVs, boats, etc, employ two series-connected 12V lead-acid batteries. The charging system can...
This article briefly describes the Heart Rate Monitor (TL072). This principle is easy to understand, but also very practical. Depth understanding of ci...
The adjustable voltage monitor can be used to check whether the voltage in a circuit remains within a given range. If the dc voltage is less than the v...
The circuit in the diagram was originally designed to monitor an oscillator, but can also be used as a general-purpose level indicator for a.c. signals...
A telephone status monitor circuit for determining the on/hook and off/hook conditions of a telephone connected across standard tip and ring terminals ...
Telephone line monitor Circuit Circuit diagram If you feel that somebody is tampering with your telephone line you might find this little circuit usefu...
LM3914 12V Battery Monitor Circuit This bar graph LED battery level indicator circuit is based on LM3914 monolithic IC from National Semiconductor that...
Igor Lovri Few months ago, I got request to find some kind of solution to measure G-Forces in moving car. I found a lot of commercial products on net, ...
This circuit is designed to monitor the level of power capacity at 12V Lead-Acid battery. Battery power level will be indicated by LEDs. This easy circ...
Any potential from 1 to 15 V can be monitored with this circuit. Two lamps alert any undesirable variation. The voltage differential from lamp tum-on t...
The precision voltage-monitor chip contains a temperature-compensated voltage reference. R1 divides down the battery voltage to match the built-in refe...
It came to me in a flash. A simple way to see if a fuse has blown without removing it from its holder. Its not often you can design a circuit using jus...
battary mornitor circuit This circuit is used to monitor the battery voltage to display a dual-colored LED status of the battery to. If the LED greenba...
This article describes the Monitor Life Extender (TLC555). The principle is very simple, very practical. The circuit components can help you understand...
This is a battery tester circuit.This circuit is used to indicate whether the level of a battery voltage is? normal, under-voltage, or over-voltage, ve...
With a few resistors, LEDs and using a LM3914 bar/dot display driver IC we can construct a simple5V Voltmeter Monitor Circuitwhich provides TTL-compati...
Most of the circuitry is contained in the LM3914 dot/bar-graph driver IC chip. In addition to the comparator circuitry within the package, it also cont...
Figure 1 The circuit is designed to detect audio signals on a remote area for security purposes. Preamplifier (preamp) a device normally used together ...
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