Solar Charger Schematic

To take advantage of sunlight shining on the earth can continue to be utilized to serve as a power source so that we can at least save on electricity prices continuing to rise, below is one of a series of simple power plant can be created and used to fill your motorcycle battery or for emergency lights.

How it Works series:
Sunlight is received by the solar panels are then processed into electricity, but electricity generated from each panel is still too small where the 8 Cell Panel arranged in series only mrnghasilkan voltage of approximately 4 volts with a current 200 mA.nah therefore required an electronic circuit to increase the voltage and current enough to be used as a Battery Charger.Electronic Rangakain act as a series of DC to DC Inverter (DC to DC Inverter), which was built by two pieces of Capacitor, Resistor 1, a transistor, a diode, and a coil which is the point of the creation of this series.

The circuit was built with a single oscillator system (blocking oscillator) which was built by the transistor and a coil in which the primary winding totaling 45 turns and 15 turns in the secondary as feedback to provide the voltage at the base of the transistor output of the primary winding connected to the diode and used to The battery charging.When the circuit is coupled with the Emergency Neon Lights will certainly get enough voltage to light at night for free. because its batteries during the day in charge by the sun.

Car Speed Alarm Schematic

When we are driving sometimes we do not know the speed of our car, especially when we are in the course of the highway so nice and straight, if the car's speed is too fast or faster than anyone could lead to accidents that do not want to happen. The circuit then requires the Car Speed ​​Alarm is to alert the driver who did not notice the speed because the roads are nice and straight. Even this series can be set speed, for example, we set when exceeded 100km/h the alarm should sound.

The workings of the circuit:A piezo buzzer will sound. Speed ​​pulse is inserted into the base of Q1 and the resulting waveform at the collector is fed through a RC network to the input of an LM2917 frequency to voltage converter, IC1. The resulting voltage is fed to three comparators (IC2d-IC2b) which has a reference voltage at the inverting input they are set by the 10-turn trimpots VR1, VR2 and VR3. The output of each comparator is applied through another RC network to the gate of an SCR. Anode of the three SCRs are commoned comparator inverting input connected to the left, IC2a.Non-inverting input is set to 2.3 V with a trimpot VR4. In use, once you exceed the speed setting for the comparator in particular, relating SCR to briefly pull the pin 2 of IC2a ​​low and short beep is emitted by a piezo buzzer. Then, if you exceed the speed setting that followed, another beep will be heard. The idea is to make each setting speed of several km / h higher than it actually is, so if you are driving at the correct speed in a particular zone, the buzzer will not sound. But as you increase speed, the buzzer will beep once because you exceed the speed settings for each zone. In this way, there is no need to constantly switch setting the pace as you pass through different zones and you can choose to ignore the beep is not "illegal".