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Driver LED circuit for Counter

Driver LED circuit for Counter using 555, 4046B, 4017B, 1N4004, BD649, 7805

Driver circuit LED Chaser

Driver circuit LED Chaser CD74HC4017, MM74C14 Driver circuit LED Chaser CD74HC4017, MM74C14 Parts List IC1 MC14584BCP IC2 CD74HC4017N T1 2N3904 or 2N4401 NPN transistor D1 to D8 1N4148 or 1N914 Diodes 10 LEDs Blue, green or white Ultra-Bright LEDs with Vf = 3.2V or less at 20mA R1 100K 1/4W resistor R2 1M Linear-taper potentiometer […]

Circuit Symbols of Electronic Components and two basic symbols were

Circuit Symbols of Electronic Components

MC3403 datasheet, Pinout, application circuits

MC3403 datasheet, Pinout, application circuits Quad Low Power Operational Amplifiers using MC3403 The MC3403 is a low cost, quad operational amplifier with true differential inputs. The device has electrical characteristics similar to the popular MC1741C. However, the MC3403 has several distinct advantages over standard operational amplifier types in single supply applications. The quad amplifier can […]

How to Make 2.3 GHz Pre-Amp (Part 1)

This article is own by Grant Hodgson. . Eagle-eyed readers may have noticed the reference to an ATF-54143 in John G3XDY’s notes on the pre-amplifier testing results at the November Adastral Park round table, published in the March 2002 Newsletter. Here are some more details of this pre-amp which has some rather interesting properties :- […]

Audio amplifier circuits

Audio amplifier circuits using LA4597

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