Nestbox Solar Wireless CCTV Camera Circuit

D1 is a Schottky Diode used to prevent battery charge escaping through the solar panel at night. Something like a 1N5817 (1 Amp 20 Volt diode) will do the job and it has a very low voltage drop of under 0.45 Volts. D2 and D3 are ultrabright LEDs used to illuminate the inside of the nestbox. R3 and R4 are resistors chosen (400+ Ohms) to ensure that no more than 30mA of current gets to the sensitive LEDs, with R5 (a 10k variable resistor) used to increase the resistance and therefore dim the LED s if they are too bright.The LM317T is a voltage regulator * used to bring the voltage of the solar panel and batteries down to just over 8 volts using resistors R1 (270 Ohm) and R2 (1500 Ohm) to set this value. K is the wireless CCTV camera. A switch (not labelled) is used to manually turn the camera on and off as required.

Photo Timer Using 555 Microchip circuits

Time is set by potentiometer R2 which provides a range or 1 sec. To 100 seconds with timing capacitor C1 of 100uF. The output at pin 3 is normally low and the relay is held off. A momentary push on switch S1 energies the relay which is held closed for a time 1.1 X (R1+R2). C1 and then released. The exact length of the timing interval will depend on the actual capacitance of C1. Most electrolytic capacitors are rated on the basis of minimum guaranteed value and the actual value may be higher. The circuit should be calibrated for various positions of the control knob of R2 after the timing capacitor has had a chance to age. Once the capacitor has reached its stable value, the timings provided should be well within the photographic requirements.

Photo Timer Circuit Using 555 Microchip Parts List :

C1 - 100uF, 25V electrolytic
C2 - 0.01uF, disc ceramic
D1, D2 - DR50 or 1N4001
R!,R2 - 10K ohms, ¼ watts
R3 - 1 M ohms, potentiometer
RLY1 - 12V, DC relay, operating current less than 200mA
S1 - Push-to-on switch
U1 - NE555 timer IC

P1 & P2 are for exposure lamp ckt.

Digital camera psu batteries charge

DIGITAL CAMERA PSU AND BATTERIES CHARGER Circuit

This ambit was created for agenda cameras. It's accepted the agenda cameras accept ample ability consumption. For archetype my camera Minolta E223 requires about 800 mA. In convenance a mains ability accumulation or aerial accommodation NiMH accumulators (batteries) can amuse this demand.

This ambit consists of two parts, charger and adapter. The transformer, rectifier arch and absorber condensator are common. Adapter is absolutely artlessly its capital allotment is an adjustable voltage regulator LM 317 according to accepted setting. Output is a acceptable for camera jack plug. Voltage can be adapted in ambit 2-9 V.

In the charger ambit a 7805 anchored voltage regulator works as accepted architect assured connected accepted during charging. This charging accepted can be adapted with the 100 /1W potentiometer in ambit about 50-300 mA adumbrated by a baby accepted barometer instrument. From one to four batteries can be answerable simultaneously. The about-face charge be set according to cardinal of batteries, and charging accepted of batteries accustomed by architect charge be adjusted. This ambit doesn't admeasurement charging time and charging action of batteries. Manufacturers accord charging time, usually 14-16 h. I apparent this botheration with a simply, bargain automated mains timer. I anticipate its accurateness is sufficient.