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Function Generator / Oscillator / Timer (12) piece Linear IC Assortment Don't confuse the extremely hard-to-find NE566 with the NE556. They are not the same. There's a world of difference! Know your apples and oranges. Find out what makes the NE566 so special below. Musicians have long known the versatility of the NE566, the heart of a variety of electronic music effects. There's an ∞ of uses for these specialty parts. Maybe more. * (2) NE566 one HOT Function Generator SIGNETICS the preferred source Out of production and Scarce. 1000:1 Continuous Sweep possible * (6) NE555 Timer [The world's most popular timer!] * (4) NE556 Dual Timer, two '555s in a 14 pin package Electronic Musicians, HAM Amateur Radio Operators, Experimenters, Hobbyists, Boy Scouts and Engineers who appreciate the versatility of '555 timer will be WOW-ed by the increasingly hard-to-find, NE566 Voltage Controlled Function Generator. Check out the datasheet link below. Only 3 additional parts are needed to make a linear Voltage Controlled Oscillator (VCO) with both triangle and square wave outputs. [Example below shows Pin 5 with a reference voltage supplied by a resistor divider, but the control voltage can come from any external source.] But there's MORE! Apply a linear, variable DC voltage to the NE566 control pin 5, and you can sweep a full 10:1 decade, frequency tuning range with a single timing Resistor / Capacitor pair. Switch in other R1 / C1 pairs and you can make a very simple, multiple decade, function generator from sub-sonic up to 1 MHz. That's twice the FMAX of the '555 timer! How about a 1000:1 sweep with a single fixed capacitor? Read on! Engineers, Technicians: With your ingenuity, the '566 datasheet provides enough information to design a circuit to provide a direct frequency readout from a linear 10-turn pot and dial (not included) and a few extra parts to set the upper/lower calibration limits. Other applications include FM modulator, clock generator, FSK and PLL. Works with single or dual supplies. The '555 is the most popular timer ever made. Timing delays can range from µs to hours. Search the web for thousands of 555 timer and oscillator circuits. The NE566's are by SIGNETICS, the original, preferred source. Manufacturers of the '555 and '556 may vary. NE555 / NE556 Application Note (356K PDF) Be sure to add us to your Favorites List ! 14 day Non-DOA, Good-on-Arrival Guarantee Untested, but NO JUNK or suspect parts PCB parts are thru-hole, NO SMD/SMT Manufacturers may vary from picture |