Voltage Doubler For Solar Battery Charger

This is a circuit for PV Solar Panels have typical voltages of 3, 6, 12, 24 Volts. This circuit can be built which will increase the voltage output from a solar panel so it can be used to directly power a device or to charge batteries. This is the figure of the circuit;


It is comprised of some very easy to source components. The key component is the NE555 timer IC - one of the most popular integrated circuits (ICs) of all time. In this circuit it is used to generate short pulses of DC electricity which are passed through a couple of diodes and capacitors which act to multiply the voltage. The maximum output current of a 555 timer is typically 200 mA and it can dissipate up to 600mW of power. Exceed these specifications and the chip may be destroyed. Click here for full typical NE555 Specifications.

Timer Circuit Using 4060B IC

This is a design circuit fir timer circuit that is based using 4060B. This is the figure of the circuit;


The pins labeled in red Q4-Q14 are the binary outputs: Q4 for the 16's, Q5 for the 32's, Q6 for the 64's and so on up to Q13 for the 8192's, and Q14 for the 16384's. Just three external components are required to control the 4060B counter - two resistors and one capacitor. The frequency of the internal oscillator (i.e. the speed of the count) is set according to the equation. Since Q14 represents the 16,384's and Q4 represents the 16's - we know it will take 1,024 times longer (16,384 / 16) for Q14 to flip from 0 to 1 than it takes Q4. So, for an example 2-hour timer (=7,200 seconds), we just need to fine-tune the circuit so that Q4 turns on after 7,200 / 1,024 seconds = 7.03 seconds, knowing that if that is done correctly, after exactly 2 hours Q14 will flip from 0 to 1.