Converter circuit 12Vdc to 24Vdc

dc-converter-schematic


This converter circuit shows a DC-DC converter that converting up 12Vdc source to a 24Vdc. It can be used to run radios, small lights, relays, horns and other 24V accessories from a 12V vehicle with a maximum draw of about 800mA.

555 Timer Circuit Diagram Police Siren

555-timer-schematic-police-siren

555 Timer Circuit Diagram Police Siren

This 555 timer police siren schematic diagram use 2 555 timer to produce an up-down wailing sound.

The first 555 is wired as a low-frequency oscillator to control the VOLTAGE CONTROL pin 5 of the second 555. The voltage shift on pin 5 causes the frequency of the second oscillator to rise and fall.

24 volt dc power supply circuit diagram schematic

24-volt-dc-power-supply-circuit-diagram-schematic24 volt dc power supply circuit diagram schematic

This circuit shows how to build your own 24 vdc power supply with 2 A (ampere) current. The transformer of TR1 lowering the voltage of 230V with 24V secondary voltage on a transformer.