How to build Crystal Tester

2016-01-24 10:02  
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This circuit enables you to test quartz resonators at the range values from 32kHz to 24MHz. Confirmation of good state of quartz resonator is done by diode signalling LED and acoustic signal. Switch S2 enables change of range .

Circuit diagram

Crystal Tester-Circuit diagram


R1,R7 1 MR2,R3 5,6 kR4 220 KR5 1 kR6 220C1,C2 220 pFC3,C4 10 F/25V RSMC5 100 nFC6,C7 33 pFD1 LED 5 mm, yellowD2 1N4148T1 BC547CIO1 4060IO2 74HC4060IO3 78L05S1 push button (normally open)S2 Two-positional switchCrystal TesterCrystal Tester

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