Constant temperature crystal oscillator
Crystal oscillators generate pretty accurate frequencies, but the output varies a bit depending on the operating temperature. The crystal oven heats a crystal to a constant temperature to get the most...
View ArticleHigh precision decade frequency generator
Jbeale designed a high precision decade frequency generator based on a 26Mhz ovenized oscillator with stability of +-1 part-per-billion, or +-0.0000001%. The generator is controlled with a PIC16f1823...
View Article1Hz to 10MHz frequency meter using ATtiny2313
1Hz to 10MHz frequency meter using ATtiny2313: This AVR-based Frequency Meter is capable of measuring frequencies from 1Hz to 10MHz with 1 Hz resolution. The hardware of this project consists of seven...
View ArticleMains frequency display
fowkc has just published his latest project the mains frequency display: I wanted to make a display that could show the mains frequency to 3 decimal places. I’d be using the same seven-segment display...
View ArticleCrystal oscillator frequency pulling
KF5OBS writes: This video briefly explains how to influence a crystal oscillator’s frequency by introducing reactive elements such as trim capacitors and inductors. This example uses a very simplistic...
View ArticleSimple crystal tester
Dilshan Jayakody writes: This is simple Colpitts oscillator to test commonly available passive crystals which range between 2MHz to 27MHz. This unit must connect to an oscilloscope and/or frequency...
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