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  • Board System Monitoring for Temperature and Voltage Conditio

    2015-01-23 18:17:5668

    This article describes the Board System Monitoring for Temperature and Voltage Condition (NE1617A). The content is very simple, very helpful. Component...

  • How to build Voltage Monitor

    2015-01-23 15:54:3690

    Circuit diagram Parts D1 LEDR1 1.2k ResistorR2 10k Var. ResistorU1 UA741 OP AMP Description When the input voltage is 0 the LED glows. The LED stops gl...

  • Current Monitor (2N3684)

    2015-01-23 15:35:41330

    On the circuit diagram, R1 is used to senses current flow of a power supply. We could use JFET as a buffer because Id=Is, therefore the power supply cu...

  • Single Transistor Lead Acid Battery Monitor (BC547)

    2015-01-23 14:47:19121

    This article describes a Single Transistor Lead Acid Battery Monitor (BC547). The principle is very simple, very practical. The circuit components can ...

  • Mains Voltage monitor using LM3914

    2015-01-23 14:38:5391

    This Circuit helps in the monitoring of mains supply voltage. It does not use a isolation step down transformer. This has to be constructed only by ski...

  • Relaxation or Stress Monitor Project

    2015-01-23 14:35:08122

    This relaxation and stress monitor circuit tells you that whether your body is relaxed or not. It exploits the skin’s galvanic property to measure th...

  • Computer Voltage and Temperature Monitoring

    2015-01-23 14:29:4082

    View Full Size Image View Original Datasheet The LTC2991 is used to monitor system temperatures, voltages and currents. Through the I2C serial interfac...

  • Monitor Pin Detector CIRCUIT (74HC245)

    2015-01-23 13:33:17320

    To monitor the pins of the chip without any load I put on two 74HC245 integrated that drive the LEDs. In this way I view the states of the inputs and o...

  • Static Charge Monitor

    2015-01-23 13:22:3685

    Here is a circuit that can sense the static electricity level in the atmosphere. It gives LED indications for both positive and negative atmosphere cha...

  • Ac Current Monitor electronic circuit diagram

    2015-01-23 12:38:5179

    Parts: R1,R2,R8____________1K 1/4W Resistors R3,R4_____________220K 1/4W Resistors R5________________100R 1/4W Resistor (See Notes) R6_________________...

  • Hall-Sensor Current Monitor

    2015-01-23 10:19:20314

    The circuit uses a Hall-effect sensor, which consists of an IC that resides in a small gap in a flux-collector toroid, to measure dc current from 1 to ...

  • Cb modulation monitor

    2015-01-23 10:19:16345

    Connect this circuit to a transceiver with a coaxial T connector in the transmission line. Key the transmitter (unmodulated), set 31 to CAL, and adjust...

  • Medical ECG Monitors using the AD620 Instrumentation Amplifi

    2015-01-23 09:12:14261

    One of features of the AD620 instrumentation amplifier is low current noise, this benefit allows its use in the Electrocardiography (ECG) monitors. A m...

  • Heatsink temperature monitor circuit

    2015-01-23 09:05:5677

    This heatsink temperature monitor circuit signals via 3 LEDs when the temperature exceeds 2 boundary levels. When the heatsink temperature is below 50 ...

  • Over/Under Voltage Monitor

    2015-01-23 08:42:4294

    This is a over/under voltage monitor circuit. This circuit is used to monitor Any potential from 1 to 15 V. If there is a undesirable variation was occ...

  • Linear LTC4151 Voltage and Current Monitoring Device Datashe

    2015-01-23 08:37:32125

    If you looking for a feature-rich power monitoring device that suits on a wide variety automotive, telecom, and industrial applications you may conside...

  • Three input first response monitor CIRCUIT (2N5062)

    2015-01-23 07:48:49103

    This article describes the Three input first response monitor CIRCUIT (2N5062). The principle is very simple, very practical. The circuit components ca...

  • High Side Current, Input Voltage and Open Fuse Monitoring wi

    2015-01-23 07:28:3084

    View Full Size Image View Original Datasheet The LTC4151 is a high side power monitor that operates over a wide voltage range of 7V to 80V. In default ...

  • Bidirectional H-Bridge Monitoring with ADC-Friendly Differen

    2015-01-23 06:26:4069

    View Full Size Image View Original Design Note The dual outputs of the LTC6103 can be used individually to provide overload detection, and/or may be ta...

  • Acid rain monitor

    2015-01-23 05:57:36187

    A bridge rectifier and 12-volt regulator powers the MOSFET sensing circuit. The unregulated output of the bridge rectifier operates the drain solenoid ...

  • ESP SIM Sound Impairment Monitor (MJE2955)

    2015-01-23 05:16:41146

    This article describes the ESP SIM Sound Impairment Monitor (MJE2955). The content is very simple, very helpful. Components in this article can help yo...

  • Line-current-monitor

    2015-01-23 03:41:1369

    A low-cost filament transformer provides a linear indication of the load current in an ac line. This method causes a slight series voltage drop over a ...

  • Full-Bridge Load Current Monitor

    2015-01-23 03:07:5174

    View Full Size Image View Original Datasheet The LT1990 is a micropower precision difference amplifier with a very high common mode input voltage range...

  • Mains Voltage Monitor(BC337)

    2015-01-23 03:07:2095

    This article briefly describes the Mains Voltage Monitor (BC337). Although this circuit is very easy to understand, but also very practical. Circuit el...

  • Security Monitor Using LM386

    2015-01-23 02:43:4177

    This circuit is a circuit diagram of security system. You can use this in the garden and listening to unusual sounds, or maybe just the sounds of wildl...

  • 1-Cell Monitor with Bottom-Side Sense

    2015-01-23 01:16:5265

    View Full Size Image View Original Datasheet The LT2940 measures a high side current and a differential voltage, multiplies them and outputs a current ...

  • Current-monitor

    2015-01-23 00:18:47135

    This circuit uses a Hall-effect sensor, consisting of an IC that resides in a small gap in a flux-collector torrid, to measure de current in the range ...

  • Temperature Monitor

    2015-01-22 23:24:1375

    Temperature Monitor Notes: Using a thermistor in the position shown makes a heat activated sensor. A change in temperature will alter the output of the...

  • Low-voltage monitor

    2015-01-22 23:17:18167

    This circuit monitors the voltage of a battery and warns the operator when the battery voltage is below a preset level by tumingon an LED. The values a...

  • Pulse Rate Monitor(TLC274)

    2015-01-22 21:34:55199

    This article describes the Pulse Rate Monitor (TLC274). The principle is very simple, very practical. The circuit components can help you understand be...

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