Category: Circuit Diagrams

Lithium-ion Battery Charger Switch-mode

Lithium-ion Battery Charger Switch-mode Circuit Diagram

Lithium-ion battery chargers using switch-mode technology is the ideal choice for powering up devices quickly, safely, and efficiently. Unlike standard linear charging methods, switch-mode charging uses a control circuit to more accurately control the amount of current going into the Battery Pack, reducing peak input power and maximizing energy efficiency.

Balanced Power Supply Circuit Diagram

Balanced Power Supply Circuit Diagram

This design is useful in those cases where balanced power lines providing a relatively small output current are needed. The diagram shows a ±15 V supply that can provide a continuous output current of about
25 mA, or 100 mA peak. With other transformers and/or voltage regulators, the supply can be adapted for output voltages of ±5 V, ±9 V, ±12 V, ±15 V, +18V, and ±24 V.

Time Lapse Circuit Diagram

Time Lapse Circuit Diagram

Time intervals play an important role in electronics and more particularly in test and measurement technology. Normally, a digital circuit is used in which an oscillator provides good resolution and reproducibility. The present circuit is no exception: it consists of a retrig gerable monostable multivibrator (MMV), a Clear circuit, a decimal counter and a BCD-to-decimal counter (BCD-binary coded digit).

Polarity Protection Circuit Diagram

Polarity Protection Circuit Diagram

In lots of cases, the battery or batteries in digital equipment may be inserted with the wrong polarity. It’s far, therefore, recommended to use polarity protection consisting of proven in the diagrams. It must be mentioned that even though a Schottky diode may be used, this reasons a voltage drop of a few hundred millivolts, which within the case of a 3 v or 1.5 v battery delivery is too much. The safety within the diagrams no longer purpose any discount within the supply voltage.

Crystal Oscillator Low-power Circuit

Crystal Oscillator Low-power Circuit

A crystal oscillator is an incredibly useful piece of electronic surveillance equipment that can be used in a variety of applications, such as clocks and timers, radio transmitters and receivers, telecommunication systems, and computers. Its accuracy is unmatched due to its use of quartz crystals whose frequencies can be accurately tuned to a specific resonance frequency.

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