Agricultural harvester warehouse full schematic reminder

The circuit functions as a reminder system utilizing a photodetector amplifier circuit along with a sound and light alarm circuit, as illustrated in Figure 1. The photodetector amplifier circuit consists of a pilot light (HL1), a light switch (S1), a photoresistor (RG), resistors (R1, R2), a potentiometer (RP), and a transistor (V1). The sound and light alarm circuit is composed of a transistor (V2), a relay (K), a diode (VD), an indicator lamp (HL2), and a buzzer (HA). When in operation, the reminder circuit is housed in a small control box with RG and HL mounted on the front panel, while S1, S2, and HA are located on the rear panel. HL2 is positioned for easy visibility by local staff. The control box is designed to fit into a rectangular open slot on the front side of the grain storage facility.

When the grain storage is full, RG receives external light, resulting in a low resistance state, causing V1 to conduct while V2 remains off. In this state, relay K is released, so HL2 remains unlit and HA does not sound. Conversely, when the grain storage is filled, it obstructs RG, leading to a high impedance state due to the lack of light, which activates V1 and V2, causing relay K to engage its normally open contact, illuminating HL2 and sounding HA to notify the operator that the grain storage is full. During nighttime operations, if external light levels are too low, S1 should be engaged to illuminate HL1, preventing the alarm system from failing. The sensitivity of the light control can be adjusted by varying the resistance of RP.

For component selection, R1 and R2 should be 1/4W metal film or carbon film resistors. The potentiometer RP must be a small synthetic membrane variable resistor. The photoresistor RG should be from the MG45 series, with a light resistance of less than 5 kΩ and a dark resistance greater than 5 MΩ. The diode VD should be a 1N4007 silicon rectifier diode. Transistors V1 and V2 can be either 58050 or C8050, or 3DG8050 silicon NPN types. HL1 should be a 12V vehicle light bulb, while HL2 should be a 12V red indicator light. Relay K must be a small 12V DC relay, and HA should be a 12V buzzer. S1 and S2 should be small toggle switches. The system can be powered by a small 12V maintenance-free battery or a 12V DC power supply sourced from the harvester.

This detailed schematic description provides a comprehensive overview of the circuit's functionality, component selection, and operational parameters, ensuring an effective and reliable grain storage reminder system. Circuit works The harvester warehouse full of reminders by the photodetector amplifier circuit and sound and light alarm circuit, as shown in Figure 1. Circuit, the photodetect or amplifier circuit by a pilot light HL1, light switch S1, photoresistor RG, resistors R1, R2, potentiometer RP and a transistor v1 composition; sound and light alarm circuit by the transistor V2, relay K, diode VD, instructions H L2 lamp and buzzer HA composition. When used, the reminder circuit mounted in a small control box, RG, HL mounted on the front panel of the control box, S1, S2 and HA mounted in the control box on the rear panel, HL2 installed local staff readily observable.

On the front side of Grain Storage combine a rectangular open slot for installation of the control box. When installed, the front panel of the control box should be installed on the inside of the storage silos, the driver in front of the rear panel.

When the reservoir within the granary full of grain warehouses, RG irradiated external light and the low resistance state, this time V1 conduction, V2 end, K is the release state, HL2 does not shine, HA is not sound. When filled with food warehouse, the warehouse of food will cover the RG, RG because no light irradiation becomes high impedance state, so that V1 end, V2 conduction, K pull its normally open contact connected, H L2 point bright, HA alarm sound to inform the driver granary is full.

When night operations, external ambient light is too dark, then S1 should be connected, so HLl lit, failure to prevent the alarm device. Adjust the resistance of RP, you can change the light control sensitivity. Component selection R1 and R2 use 1/4W metal film resistor or a carbon film resistors. RP use of small synthetic membrane variable resistor. RG choose M G45 series (light resistance less than 5kfl, dark resistance is greater than 5 MfZ) photosensitive resistor.

VD choose 1 N4007 type silicon rectifier diodes. V1 and V2 use 58050 or C8050,3 DG8050 silicon NPN transistors. HL1 selection of vehicles with 12V light bulb; HL2 selected 12V red light. K small 12V DC relay selection. HA selects sound source 12V comes with a buzzer. S1 and S2 use a small toggle switch. GB using a small 12V maintenance-free battery or a 12V DC power supply on the harvester.