GSK-1005 - Global Specialties

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