Under/Over Voltage and Current Protection Switch
https://www.electronics-lab.com/project/under-over-voltage-and-current-protection-switch/
This simple project allows users to design an under-voltage, over-voltage, under-current, and over-current protection switch. It is a highly useful system for safeguarding electrical loads against abnormal power or current conditions. The project features a relay with optocoupler input, a current-sensing circuit based on the INA195 amplifier, a 10mΩ shunt resistor, and a voltage divider […]
Fault Protected High Side Switch
https://www.electronics-lab.com/project/fault-protected-high-side-switch/
This project uses the LT1910 high-side switch to protect a load from over-current. It automatically shuts off, flags the fault, waits 150 ms, and attempts to restart. The current trip point is set via selectable shunt resistors.
10 Minutes Timer for AC Loads
https://www.electronics-lab.com/project/10-minutes-timer-for-ac-loads/
The project described here is a 10-minute timer using an Arduino microcontroller, capable of driving AC loads up to 30A. The timer’s progress is visually represented by 10 LEDs, which light up sequentially, each for 1 minute, totaling 10 minutes. The project is powered by a single 230V AC supply, converted to 12V DC for […]
Electronic DC Load using TLE2141
https://www.electronics-lab.com/project/electronic-dc-load-using-tle2141/
The circuit shown here is a low-cost electronic DC load designed to sink current from a power source. This test equipment can be used to test power devices such as power supplies, chargers, solar panels, and batteries. The board is built using op-amp TLE2141, LM385 provides the reference voltage. Resistor R11 acts as a shunt […]
Low Profile 2 Channel Solid State Relay for AC Loads
https://www.electronics-lab.com/project/low-profile-2-channel-solid-state-relay-for-ac-loads/
This project offers an extremely compact solution for interfacing 2 high voltage resistive or inductive loads. At a low profile, this is the most compact & versatile optically isolated 2 channel solid state relay system. The circuit consists of 2x Triacs and isolated Triac drivers. The circuit is compatible with TTL input signals and controls […]
8 Channel Inductive Load Driver Arduino Shield
https://www.electronics-lab.com/project/8-channel-inductive-load-driver-arduino-shield/
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 […]