Solar Flasher Model GSK-1005 This is a blinking light circuit power by the energy of the sun. Figure 1 Installing components Utilizing a solar panel to convert the suns energy two LEDs will alternatively blink and the blinking speed may be adjusted. Technical Specifications n Power Source: Solar panel n Solar panel: 4 VDC, 60 mA n Adjust flashing speed with potentiometer n PCB dimensions: 1.39 x 1.27 inches Operating Principles TR1 and TR2 form a multi vibration frequency circuit when assembled and work in conjunction with LED1 and LED2 to alternatively turn the LEDs on and off. When TR1 is powered, LED1 will light and LED2 is off. When TR2 is powered, LED2 will light and LED 1 is off. The blinking speed is controlled through VR10K, R2, R3, C1 and C2. R1 and R4 act to reduce voltage to the LED. Circuit Assembly Please refer to Figures 1, 2, and 3 for aid in component placement. It is recommended to start with lower components i.e. diodes, resisters, electrolyte capacitors, and transistors. Be careful to check polarity with Figure 3 before soldering. If a problem is detected it is best to use a desoldering pump or desoldering braids to remove component. This will minimize potential damage to the printed circuit board. Note Troubleshooting This solar panel will not convert fluorescent light to DC voltage. This circuit has only a few components. The main cause of problems come from misplaced components or faulty soldering. Special handling instruction Utilize Figure 3 to ensure proper placement/polarity and Extra care must be taken to ensure proper installation of then check solder points for connectivity. solar panel to PCB. Severe damage may occur to the solar panel if the positive and negative poles are short circuited when soldering. Testing Turn the solar panel to receive the maximum sunlight. The LED1 and LED2 will work alternatively providing the solar panel is receiving sufficient sunlight. Adjust the trimmer potentiometer VR10K blinking speed should vary according to adjustment. Electronic Kit Set for Hobby & EducationFigure 2 LED flasher 2 dot circuit Figure 3 Connecting circuits GSK-1005 www.globalspecialties.com