Lead Acid Battery Voltage Monitor using ATMEGA328
https://www.electronics-lab.com/project/lead-acid-battery-voltage-monitor-using-atmega328/
Monitoring the voltage level of a 12V Lead Acid Battery (SLA) is easy and simple with this project. The board is made using an ATMEGA328 micro-controller and 12 x 5mm LEDs. The ATMEGA328 microcontroller senses the analog voltage on A3 Analog pin and drives 12 LEDs connected to digital I/O pins of the chip. Input […]
DIY PCB Exposure Box using Arduino Nano
https://www.electronics-lab.com/project/diy-pcb-exposure-box-using-arduino-nano/
Printed circuit boards make the creation of electronic devices in a repeatable and reliable manner a possibility. However, due to factors such as long turnaround time, cost, and other challenges associated with making PCBs through established fab houses, electronics hobbyists and prototype engineers usually turn to DIY approaches of PCB development like the heat transfer […]
Adjustable Constant Current LASER Diode/LED driver
https://www.electronics-lab.com/project/adjustable-constant-current-laser-diode-led-driver/
I was testing a couple of low-cost laser diodes that come from china and I was wondering why those diodes don’t have any protection/driver circuitry. Those diodes come with a simple series resistor for current control which is not a good idea nor stable. Laser diodes are harmful and should have some sort of constant […]
12W Dimmer with Soft Start for 12V LEDs
https://www.electronics-lab.com/project/12w-dimmer-with-soft-start-for-12v-leds/
The circuit presented here is a LED dimmer with a soft-start function. The board can drive a LED up to 12W and the circuit can manage a load up to 1A continuous with 12Vsupply. The circuit is built using SG3525 PWM IC and the IRFR120 MOSFET, SG3525 generates the PWM, and IRFR120 MOSFET drives the […]