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This product prevents/disconnects the load when an under-voltage condition occurs. The circuit latches the output when input sense voltage drops below the lockout threshold. Lockout threshold voltage can be adjusted using the onboard trimmer potentiometer PR1. Tactile switch SW1 is provided to reset the latch when input sense voltage is back to normal. The circuit consists of a MAX835 chip, 5V Relay, BC857 PNP transistor to drive the Relay, power LED, Relay/Output LED, and tactile switch. MAX835 chip features a level-sensitive latch, eliminating the need to add hysteresis to prevent oscillations in load-disconnect applications.
B135
This product prevents/disconnects the load when an under-voltage condition occurs. The circuit latches the output when input sense voltage drops below the lockout threshold. Lockout threshold voltage can be adjusted using the onboard trimmer potentiometer PR1. Tactile switch SW1 is provided to reset the latch when input sense voltage is back to normal. The circuit consists of a MAX835 chip, 5V Relay, BC857 PNP transistor to drive the Relay, power LED, Relay/Output LED, and tactile switch. MAX835 chip features a level-sensitive latch, eliminating the need to add hysteresis to prevent oscillations in load-disconnect applications.
MAX835 micropower voltage monitors have a 1.204V precision bandgap reference, comparator, and latched output in a 5-pin SOT23 package. Using the latched output prevents deep discharge of batteries and disconnects the load from the power supply when Undervoltage is detected at input sense voltage. MAX835 has a push-pull output driver. Two external resistors set the trip-threshold voltage.
Connect an adjustable power supply to CN3 and apply input sense voltage in the range 3.4V to 8V, turn the PR1 trimmer potentiometer till the LED D3 is ON. Then the board is set for Undervoltage detection. For example, apply 4.90V to the CN3, rotate the PR1 so LED D3/Relay is on, the circuit is set for under-voltage detection threshold of 4.90V, now increase the input sense voltage to 5V and reset the latch using SW1.
This compact shield is based on the HX711 ADC, specifically designed to interface load cells and strain gauge sensors. It can be paired with the OLEDUINO-V2, enabling the creation of a miniature electronic weighing scale.
This board consists of Arduino-compatible hardware which includes an OLED display, ADS1115 4-Channel 16Bit ADC, Arduino-compatible Microcontroller ATMEGA328, a connector for Arduino Programming, a connector for 4 Channel Analog input, and a connector for a couple of I/O lines. Operating supply 5V DC.
This is an I2C electronic load, intended for testing power supplies, solar panels, batteries, and supercapacitors. The board consists of an I2C interface DAC MCP4725, OPAMP U2 acts as V to I (Voltage to Current), OPAMP U3 measures the load current across the shunt resistor and provides 0 to 4.9V Voltage with a current range of 0 to 1A. Users may control the battery discharge current using the MCP4725 DAC in the range 0 to 1A. The circuit also provides load current feedback and voltage feedback. This way it can help users to measure the battery’s performance. Suppose the user desires to measure the battery’s performance as it is being discharged at constant power. In that case, a current measuring circuit can be used in the feedback loop to enforce the constant power constraint. This enables you to discharge a battery at a controlled way. The project can handle 1A @ 24V, thus a total of 24W with the use of a large-size heatsink and fan. The circuit works with 5V DC voltage input. The project can be used with Arduino, ESP32, or other microcontroller.
Product consists of 20 non-contact infrared reflective sensors and each sensor provides an analog output. QRD114 sensor is the heart of the project which includes Infrared LED and photosensor. The output of each sensor is high and goes low as objects or lines detected. The analog output voltage is proportional to IR reflected back to the sensor. The project has been designed to be used in robotics applications for line follower or multi-object sensor. Sensor requires 5V DC to work, all LEDs have current limiting resistors, each output has a pull resistor, and the normal output of each sensor is high due to the pull-up resistor and goes low as object or line is detected. IR LEDs power ON/OFF can be controlled using Q1 BD140 PNP BJT transistor which requires a low voltage for normal operation or all IR LED and can be powered up to 5V DC with help of VL input pin. Two 3mm mountings provided for easy mounting on robot chassis. By reflected infrared light, it can detect transitions from light to dark or any objected comes across the sensor.
The 8 Channel Driver Arduino UNO Shield is designed to enable users to switch inductive loads for up to 800mA each channel and up to 24V DC with no heat-sink needed. It is ideal for such applications as driving 2x unipolar stepper motors, solenoids, relays, and small DC motors. It uses 2x DRV8803 Chip from Texas instruments which is 4 channel low side driver with over current protection. IC’s Internal shutdown protection function is provided for overcurrent protection, short circuit protection, under-voltage lockout, and over temperature. Faults are indicated by a fault output pin that is normally high and goes low if a fault condition occurs. Reset and enable pins has internal pull-down resistors.
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