A Simple 0-9 Counter Circuit with 7-Segment Display shows numbers from 0 to 9 and serves digital counters, clocks and measuring instruments. Also, main parts of this circuit are 7490 Decade Counter IC, 7446 BCD to 7-segment Driver IC and it works with Common Anode 7-segment display with all LED positives joined. Moreover, a 5 […]
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. Also, circuit uses IC 555 timer in astable mode and photodiode to catch light, as more light means more frequency which is easy to see link between light and […]
LM331 Based Frequency to Voltage Converter Circuit
A simple F/V converter is a useful circuit that converts signals of different frequencies into corresponding DC voltages, and people use it in many applications, including tachometers, speedometers and industrial machines. LM331 is popular IC for this and it can do both V/F and F/V and it is very accurate and very flexible, here LM331 […]
Frequency to Voltage Converter Circuit using IC TC9400
Frequency to Voltage Converter Circuit using IC TC9400 is useful in signal work, motor speed control and sensor connect. It takes frequency signal and gives voltage output and this helps to read and use frequency as voltage in many ways. Also, the circuit operates from a 10–15 V DC power supply, the circuit diagram uses […]
30 Minutes Timer Circuit using CMOS IC 4011
30 Minutes Timer Circuit using CMOS IC 4011 is good for long time delay with few minutes to many hours, also this timer turns OFF device after 30 minutes. Furthermore, it is useful for automation, delayed ON/OFF and save energy, also this type of circuit is good to save power; circuit use special chip called […]
Car LED Voltmeter Circuit using IC LM324
Car LED Voltmeter Circuit using IC LM324 is useful project to check car battery voltage, here, LEDs show different voltage which is easy to see battery condition. Main part are LM324 op-amp which act like voltage checker and voltmeter measures voltage between two points. Hence, this circuit is an LED voltmeter using the IC LM324 […]