crystal
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LCD-LED Display
Quartz Crystal Tester Schematic Circuit Diagram
Although most passive components are usually fairly easy to test, the proper functioning of a quartz crystal cannot be checked…
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Oscillators Circuit Diagrams
Micropower Crystal Oscillator Schematic Circuit Diagram
Crystal oscillators for digital circuits are normally built as Pierce oscillators with an inverter. The inverter operates as a linear…
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Clock & Timer Circuit Diagrams
Piezo-powered Lamp Schematic Circuit Diagram
Energy is becoming ever more expensive, and some fresh ideas are needed. There are already human-powered devices on the market,…
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Frequency multiplier
Dual Oscillator 098 for μCs Schematic Circuit Diagram
The MAX7378 contains two oscillators and a power-on reset circuit for microprocessors. The Speed input selects either 32.768 kHz (LF)…
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Frequency multiplier
CMOS Crystal Frequency Multiplier Schematic Circuit Diagram
Crystals usually operate at fundamental frequencies up to about 15 MHz. Whenever higher frequencies are required a frequency multiplier is…
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Oscillators Circuit Diagrams
Reanimating Probe for AVR μC Schematic Circuit Diagram
“AVR device not responding” When this discouraging message appears while you’re programming your Atmel microcontroller, that’s where the problems really…
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Clock & Timer Circuit Diagrams
ATM18 Youth Repellent Schematic Circuit Diagram
From what’s written on the cover of Bert van Dam’s book entitled “50 New Applications for PIC Microcontrollers” [1], some…
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Clock & Timer Circuit Diagrams
Thermometer with Four-Digit LED Display Schematic Circuit Diagram
Until recently, the Philips SAA1064 LED driver IC has been a sort of unofficial standard for driving seven-segment LED displays.…
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Clock & Timer Circuit Diagrams
Modeler’s Clock Schematic Circuit Diagram
The special feature of this analog wall clock is that it uses a standard model servo to tell the time.…
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Frequency multiplier
Variable Crystal Filter Schematic Circuit Diagram
Crystal filters are often used for IF filters in receivers, where the bandwidth of this filter largely determines the selectivity…
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