Agricultural pest control black light lamp circuit

The so-called black light refers to a fluorescent lamp that can emit ultraviolet light with a K of 3×I0 7m. Since insects
have a phototropism for this light, a high-voltage grid is set up outside the black light to effectively kill various harmful insects, such as :
Emoths, white butterflies, borers, etc. Figure 298 shows a practical pest-killing black light for field agriculture.
    Nongchuan pest control black light is
composed of rain lamp, light control circuit, high voltage power grid, Xigang lamp drive circuit and power supply circuit. The driving circuit of the black light lamp (E2) consists of the ballast L, the starter V, etc. Its structure is
exactly the same as that of the ordinary fluorescent lamp circuit. The operation of the circuit is controlled by the moving contact kl of the relay K. The rain control
and light control circuits are composed of humidity sensor, photoresistor and NEo05 time base circuit. The moisture-sensitive
sensor is essentially made of a single-sided copper-clad plate of Zuzhou epoxy matrix. Use a knife to divide it into two groups of adjacent but non-contacting
electrodes. Under dry conditions, the resistance between the two groups of electrodes is gigantic. If it rains and gets wet due to rain,
the resistance between the two poles will quickly drop below a few kn or hundreds of n, so the ② and ⑥ pins of N Ej 11 5 are at
high level , and the time base circuit is in a reset state, ③ The pin outputs low level, the relay K does not operate, the contact kl is opened, and
neither the Heiguangzhou E2 nor the high power grid operates. In the same way, if it is during the day, due to the photoresistor IKl. It shows low resistance when exposed to natural
light, which puts the NE555 in the reset state and operates on the black light lamp. Only on clear
nights, the humidity sensor works with R]. The equivalent resistances are all high resistance, the ② pin of the time base circuit is low,
the NE555 is set, the ③ pin jumps to the island electric A, K gets the electric pull, the electric shock KL action closes, and the black light E2
is energized Works to emit UV light to attract insects. 22 at the same time. The V alternating current passes through Fl, is boosted by the step-up transformer 'r2,
and then added to the two poles of the high-voltage power grid to kill insects.
    The luminous tube LED is the working source indicator light of the whole machine. F1 mainly protects the high-voltage power grid. Sometimes due to accidents
or excessive accumulation of insects on the power grid, the poles of the high-voltage power grid may be short-circuited. At this time, El will light up to indicate
, and it also protects the transformer T2 from being burned out. People found that
after turning on the switch, cutting off the power supply of the whole machine (at this time, the engine is turned off), and then cleaning the power grid, the circuit can operate normally again.
    K1 uses ordinary 220V, 40W incandescent bulbs. F,2 ur adopts sc 10W black light lamp
as the starter of ordinary fluorescent lamp as needed , and the ballast I should be selected according to the power of E2. RP uses Cambodia to adjust the light control sensitivity of the circuit
, and a WH5 carbon film synthetic potentiometer can be used. K is available. TZC-22F, DC12V small and medium power
electromagnetic electric appliances. T] is a commercially available high-quality 220V/12V, 8VA power supply transformer for cassette recorders. T2 requires 0
system: 25W line transformer core (core column cross-sectional area is 25mm×27mm), primary L. Use
+0.19mm high-strength polyester enameled wire to wind 2000 turns; I, use our OSrnrri high-strength polyester enameled wire to wind
28000 turns. When winding, attention should be paid to the insulation between primary and secondary , high-voltage winding L, and the interlayer insulation
(insulating paper in paper registers) should be added during winding to prevent layer discharge. After winding, it should be dipped in varnish for insulation and dried before
use. When the transformer T operates, the output terminal l-I reaches an AC voltage of 3000V.
    The humidity sensor can be made from an epoxy resin single-sided copper-clad plate of 50mm×70nitri size, using the knife-cutting method
. The distance between the two sets of electric copper foil strips is required to be 3 to 5mm. If it is too large, the detection sensitivity will be reduced; if it is too small,
it will dry out quickly after rain and affect use. The high-voltage power grid can be wound with ≠2 mm galvanized iron. It is required that
the distance between the two electric switches should be about 8mm and ensure that they cannot collide. The black light lamp E2 is placed in the high-voltage power grid . When
insects fly in and scream, they will be killed by the electricity.