Trailer stop turn signal converter circuit

1.5V Light emitting diode flasher circuit

With a 1.5V battery supply, the integrated circuit LM3909 can drive the light-emitting diode NSL5027. The 300μF electrolytic capacitor acts as a timing capacitor, which limits the flash speed to approximately 1Hz. The circuit utilizes the LM3909, a popular LED flasher...

Emergency LED Light LED-716 Emergency Light Schematic

This circuit illustrates the modifications made due to a blown resistor on the backside, which was soldered in place. The issue was traced back to this specific resistor. Currently, the pattern change switch is set to Option 3, which corresponds...

Fading LEDs

This circuit operates two LED strips in pulsing mode, i.e. one LED strip goes from off state, lights up gradually, then dims gradually, etc. while the other LED strip does the contrary. Each strip can be made up from 2...

Telephone Lamp Circuit

This is a white LED lamp that activates when the telephone rings. The cool white light aids in locating the phone in low-light conditions and assists in managing clutter. The circuit for the white LED lamp that illuminates upon a telephone...

12 Volt Gel Cell Charger

12 Volt Gel Cell Charger. Recently, an amateur was looking for a gel cell charger that would first charge at a fixed rate and then later switch to a trickle charge when the cell was fully charged. After reviewing several...

98 LEDs Fantastic Atom Expander

Here is the schematic, PC board pattern, and parts placement for a "Fantastic Atom Expander". This circuit produces an "exploding atom" effect using 98 LEDs. The LEDs can be any colour but blue. For a very interesting effect, make one...

Two-LED Pilot Light

This circuit was designed on request and can be useful to those wishing to have, say, a red LED illuminated when an appliance is on and a green LED illuminated when the same appliance is off. Any mains operated appliance...

AC Powered 220V Led Circuit

This is a simplified version of a white LED lamp that can be powered directly from the mains. It provides sufficient illumination for reading purposes. Capacitor Cx along... The circuit for the white LED lamp consists of several key components designed...

Nite Rider Lights circuit

As a cyclist, there is a constant search for methods to enhance visibility during nighttime rides. The concept of the `NITE-RIDER` was developed to create a distinctive and attention-grabbing rear light for bicycles. This design features nine extra-bright LEDs that...