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Light to Frequency Converter - This circuit uses a CMOS version of the classic 555
timer, to form a light intensity to frequency converter. A small PIN photo diode
is used as the light detector. The pulses produced are short, so in some
applications you may want to stretch them or feed them through a flip/flop to produce
a square wave signal. Although the circuit shown is designed for a 5v supply, it
could operate from almost any voltage from 3v to 15v. ….(designed by David A. Johnson) |
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Low power voltage to frequency converter makes a wireless probe for testing an
inductive power supply - 05/26/05 EDN-Design Ideas: (design idea added 6/07) |
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Mixed Signal Circuit Technologies - AN-280 Analog Devices Application Notes
(app note added 2/06) Considers problems which arise when reality (& Murphy)
intervene in a design which otherwise seems satisfactory in terms of theory and
modeling. |
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Multilayer Capacitor Doubles as Varactor - 03/20/03 EDN-Design Ideas: The main
purpose for building the circuit in Figure 1 is to study the idiosyncrasies of X5R,
Z5U, and Y5V multilayer ceramic capacitors. The circuit is also an inexpensive VCO
(voltage-controlled oscillator)with only five components. Many types of ceramic
capacitors for surface-mount placement are on the market.....(design idea added 1/05) |
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NE555 timer sparks low cost voltage to frequency converter - 02/21/08 EDN-Design
Ideas: The combination of an NE555 timer and a Miller integrator yields a
voltage-to-frequency converter that costs less than 50 cents. |
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Operation & Applications of the AD654 IC V-to-F Converter - AN-278 Analog Devices
Application Notes (app note added 2/06) |
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Photo-Diode Current-To-Voltage Converters - National Semiconductor Application
Note (app note added 2/06) |
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PIC controlled DDS VFO 0 to 6 MHz - (circuit added 7/02) |
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Programmable Clock Oscillator - voltage controller oscillator that was designed as
a wide range oscillator to generate clock pulses for a stepper motor drive system,
frequency could be varied over1,000,000:1 (added 5/02) |
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Single transistor pump - This is a simple circuit that can produce a staircase
voltage output given a periodic pulse input (added 01/08) |
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Universal Watchdog Fully Controls µ Preset - 05/25/95 EDN-Design Ideas: Many µPs
contain internal watchdog timers, and you may wonder why you need another stand-alone
circuit. Unfortunately, more highly integrated functions have preset parameters that
you may want to change. Also, internal watchdogs are generally a simple combination of
a flip-flop and a timer. If the program does not start properly on the first try, the
timer is of no use because the program never turns on the watchdog. This watchdog
catches exactly this condition.....(design idea added 3/03) |
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Using the AD650 Voltage-to-Frequency Converter as a Frequency-to-Voltage Converter
- AN-279 Analog Devices Application Notes (app note added 2/06) |
