Simple 12V DC Fan Speed Controller Circuit is an useful project in electronics. It changes fan speed by adjusting the voltage. This post talks about fan speed controller using IC LM2941. LM2941 is low dropout voltage regulator and it handles up to 1A current. It is good for cooling, temperature control and automation projects. In […]
Electronic Game Scorer Circuit
This circuit is called Electronic Game Scorer Circuit. It uses 555 timer IC and 74LS192 counter, 74LS247 decoder and 7-segment display. When player presses the button the circuit counts the score. Each press increases the number on display. So it is easy to keep score in game without writing. Circuit Working: Parts List: Component Value […]
Seven Segment Display Circuit: Datasheet, Pinouts And Working
7-segment display show numbers 0 to 9. Sometimes it show small letters. LED make it bright and famous. Now LCD are also come in use. Things like microwave, calculator, washing machine, radio, digital clock use it for numbers. Next we see 7-segment pins for better understanding. Diagram with Pinouts: Seven-segment display have seven light parts. […]
Simple 0-9 Counter Circuit with 7-Segment Display
Simple 0-9 Counter Circuit with 7-Segment Display show numbers from 0 to 9. It is used in digital counters, clocks and measuring tools. Main parts of this circuit are 7490 Decade Counter IC, 7446 BCD to 7-segment Driver IC. It works with Common Anode 7-segment display with all LED positives joined. Circuit is powered by […]
Simple Light to Frequency Converter Circuit using Timer IC 555
Simple Light to Frequency Converter Circuit using Timer IC 555 changes light brightness into frequency signal. It is useful for light measure, optic sensing and automation. Circuit uses IC 555 timer in astable mode and photodiode to catch light. More light means more frequency which is easy to see link between light and output. Circuit […]
LM331 Based Frequency to Voltage Converter Circuit
Simple F/V converter is cool circuit. It changes signal with different frequency to DC voltage same as that frequency. It is used in many things like tachometer, speedometer and factory machines. LM331 is popular IC for this and it can do both V/F and F/V. It is very accurate and very flexible. Here LM331 works […]