Battery operated mini night lamp

This is the circuit of a low power LED night lamp that will automatically switch OFF at day time. The CMOS timer IC TS555CN is wired as a square wave generator operating at around 5Hz.The output voltage from the IC1 is doubled using the combination of capacitor C2 and diode D2 in order to drive the LED. The LED can be a bright white LED. At day time the resistance of LDR drops to few K Ohms and

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Simple 9 V Battery Replacement

This circuit was originally designed to power a motorcycle intercom from the vehicle supply system. This type of intercom, which is used for communication between driver and passenger, generally requires quite a bit of power. In order to improve intelligibility there is often elaborate filtering and a compander is sometimes used as well. The disadvantage is that a battery doesn�t last very

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Circuit Mobile Phone Battery Charger

This post share about Mobile Phone charger circuits, previously you can see other Phone Battery Charger Circuit or Charger Circuit . This Charger ciruit use to charging phone battery using IC 7805 for plus voltage regulator or & 7905 for min voltage regulator. Below is a schematic circuit adapter, power supply, or battery charger (for gadgets, mobile phones, MP4player, smartphone) that is

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9V Battery Voltage Monitor Circuit

This is a circuit that can be use for monitoring the voltage of battery. This is the figure of the circuit;Nine voltage batteries are used in a wide variety of electronic devices. But, you often don�t know when it is time to change the battery until the device stops operating. The hobby circuit below provides a visual indication when the battery needs to be replaced. It uses a neat IC from

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Lead Acid Battery Charger Circuit 1

Except for use as a normal Battery Charger, this circuit is perfect to constant-charge a 12-Volt Lead-Acid Battery, like the one in your flight box, and keep it in optimum charged condition. This circuit is not recommended for GEL-TYPE batteries since it draws to much current. The above circuit is a precision voltage source, and contains a temperature sensor with a negative temperature co?ficient

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Battery Charger for vehicles

We hope this circuit will help you to understand the action of a Battery charger. Lot of people has no idea how simple it is. In this circuit we have used two diodes, one capacitor and a transformer. Ammeter is not necessary but it helps us to determine the charging level of the battery.When you finish the circuit just connect the positive and negative wires to the battery terminals. Make sure

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