Electrinic and circuit

Flyback Converter Circuit Diagram

A low-current fly-back converter is used here to generate Â±15 volts at 20 mA from a +5 volt regulated line. The reference generator in the SG1524 is unused with the input voltage providing the reference. Current limiting in a fly-back converter is difficult and is accomplished here by sensing current in the primary line and resetting a soft-start circuit. Flyback Converter Circuit Diagr...

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DC 12V Car Battery Charger

The circuit has been designed to produce a battery charger for automobiles that are using 12V batteries only. BTY79 is a 10A Silicon controlled rectifier with an operational temperature range from 0ºC to 125ºC. C106D is a 4A sensitive gate Silicon controlled rectifier that functions as reverse blocking thyristors designed for high volume consumer applications such as light, speed control, temperature, process and remote control, and warning systems where reliability of operation is important. Circuit Diagram:DC 12V - Car Battery Charger Circuit DiagramThe...

Four Tone Siren

UM3561 PROJECT CIRCUIT UM3561 IC includes oscillator and selector circuits so few external component is used for construction of four tone siren. The UM3561 contains programmed mask ROM to simulate siren sound. Power consumption of IC is low.It is powered by 3 Volt. One NPN Transistor is used for amplification of audio signal. Circuit Diagram of Four Tone SirenPart List :IC UM3561Resistance = 220 OhmsCondenser 100MfdTransistor BC548Battery Container...

Outdoor Lighting Controller

When you step out of your brightly-lit house into the darkness, it takes a while for your vision to adjust. A solution to this problem is this outdoor light with automatic switch-off. As a bonus, it will also make it a little bit easier to find the keyhole when returning late at night. Often no mains neutral connection is avail-able at the point where the switch-off timer is to be installed, which makes many circuit arrangements impractical. However, the circuit here is designed to work in this situation. The design...

123 Game All MCU Free

This electronic game pits a human player against the ‘machine’. The opponents use a common ‘game token’ and take turns moving along a path by one, two or three steps, and the winner is the first one to reach the goal exactly. Incredibly enough, this simple version of the ‘123’ game can be built without a microcontroller, and it’s almost impossible to beat. The electronics for this is built using only diode logic (Figure 1).123 Game Circuit Diagram - All MCU-FreeThe ‘ input inter face’ consists essentially of 30 miniature sockets to which a probe tip can...