Simple DC Converter For Digital Circuit by IC 555
This circuit Simple DC to DC Converter For Digital Circuit. It use Volt supply 5V Only, To Output Step up Volt 10V-12V DC max. I use IC 555 ( hot ic Timer) for Squarewave Oscillator to Driver mini Transformer and Diode, Zener Diode to Out DC Voltage.
In using digital measurement circuit with other circuits, it may be a problem in terms of power level. If the primary voltage is 5 V, but the output that you want is higher voltage between 9V to 12V. May be solved by the DC converters circuit. This small circuit, and a current output of more than 50 mA. And information is isolated style Makes good performance.
This circuit consisting of astable Multivibrators by IC1(555 timer IC) to control the on and off power supply to the transformer Tr1. by via the transistor Q1-BC547. The output voltage of secondary coil is rectified by D4 (in half wave) and filtered with the capacitor C3 and then there is the zener diode D5 as act regulated voltage.
How to choose components and building
The transformer T1 may be has We have as 1 to 1 ratio, which is used to control the SCR, or a transformer may be used in a small radio. Frequency and pulse width can be adjusted to suit the type of transformer with P1 and P2.
- Transformer for use with SCR is suitable for use with frequency 100 khz. But Audio frequency transformers, as well as approximately 0.5 to 40 Hz. And noted the polarity of the transformer in the circuit well. Do not connect the terminal.
Frequency of the circuit is given by:
F = 1/[0.7C1(P1+P2+R1+R2)]
Isolated DC-DC converters
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