Solar Flasher
Model GSK-1005
This is a blinking light circuit power by the energy of the sun.
Utilizing a solar panel to convert the suns energy two LED’s
will alternatively blink and the blinking speed may be adjusted.
Technical Specifications
nPower Source: Solar panel
nSolar panel: 4 VDC, 60 mA
nAdjust flashing speed with potentiometer
nPCB 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 LED’s 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
This solar panel will not convert fluorescent light to DC voltage.
Special handling instruction
Extra care must be taken to ensure proper installation of
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.
Troubleshooting
This circuit has only a few components. The main cause of
problems come from misplaced components or faulty soldering.
Utilize Figure 3 to ensure proper placement/polarity and
then check solder points for connectivity.
Electronic Kit Set for Hobby & Education
Figure 1 Installing components
www.globalspecialties.com
Figure 3 Connecting circuits
GSK-1005
Figure 2 LED flasher 2 dot circuit
