Alternating flasher

This is simply a LED flasher circuit that is suggested for construction. However, it is important to understand the use of transistors, which can be challenging when learning about digital electronics. The LED flasher circuit operates by utilizing a basic...

The 8-lead plastic mini-DIP LM3909 integrated circuit was developed by National Semiconductor in the mid-1970s. It is a monolithic oscillator specifically designed to flash Light Emitting Diodes (LEDs). By utilizing the timing capacitor for voltage boosting, it can deliver...

The schematic diagram below illustrates a typical 1.5V flasher circuit using the LM3909. The LM3909 is a monolithic oscillator designed specifically for flashing Light Emitting Diodes (LEDs). The LM3909 flasher circuit operates at a low voltage of 1.5V, making it...

This circuit will flash a super-bright LED (5000+ mcd). Good for fake car alarm or other attention-getting device. Component values are not critical; try anything else first from your junk box. Obviously, the 470 ohm resistor (R3) determines the...

The circuit employs a 555 timer oscillator to generate clock pulses at a variable frequency, which are fed into a 4017 decade counter. The counter is configured to utilize only three outputs, while the fourth output is connected to...

This simple circuit utilizes NAND gates to alternately flash two LEDs. The two 47µF capacitors set the flashing frequency. It is advisable to include a decoupling capacitor across the power supply. The circuit was constructed using the specified components...