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Servo Pulse to PWM - converter connects an H-Bridge to radio
control receivers or robotic circuits. (added 1/05) |
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Shortwave Bug - Circuit and notes only, no circuit description
given…. [Tony van Roon's circuit] |
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Simple circuit provides efficient PWM - 02/18/99 Issue of EDN
You often need to control the duty cycle of a square wave. The circuit in
Figure 1 ....Page includes several designs. Scroll to find this
one....[Design Idea by Kenneth Levine, Eldec, Lynwood, WA] |
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Simple DC Motor PWM speed control - ….(electronic schematic added
08/08) |
| Simple FM Transmitter Schematic -
There is no thrill like the thrill you get from operating equipment you have
built yourself. If you have never built a project from a magazine before,
let this be your first--you'll see how much satisfaction and fun you can
have!… [Tony van Roon] |
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Simple nanosecond width pulse generator provides high performance -
11-Nov-04 Issue of EDN If you need to produce extremely fast pulses in
response to an input and trigger, such as for sampling
applications,....[Design Idea by Jim Williams, Linear Technology Corp] |
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| Simple PWM ADC is Surprisingly Accurate -
06/09/94 EDN-Design Ideas....The reference voltage in Fig 1a's simple rail-to-rail PWM
ADC is the only critical component. The input-voltage range extends from ground to the
power rail which also acts as the reference. The circuit is essentially a variation on
the classic dual-slope integrator,....[Design Idea by Mike Walne, Farnell Instruments,
Wetherby, West Yorkshire, UK] |
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Single-sideband demodulator covers the HF band 10/26/00 EDN-Design Ideas....The
circuit in Figure 1 complements a previous Design Idea ( SSB modulator covers HF band
EDN , Sept 30, 1999, pg 122]. The modulator employs a phasing.… [Design Idea by Israel
Schleicher, Bakersfield, CA] |
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Smooth Tone Clickless CW SideTone Generator - This circuit is about as good
as it gets for generating morse code tones. It may be used as a code practice
oscillator, a tone generator for a keyer, a sidetone oscillator for a CW transmitter
or an audio Modulated CW (MCW) generator for an FM transmitter or repeater....[G.
Forrest Cook] |
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Soft-limiter circuit forms basis of simple AM modulator - 3-Sep-07 Issue of
EDN Inserting diodes biased by reference voltages in the feedback loop of an op
amp yields a soft limiter that you can use as the basis of an AM modulator....[Design
Idea by Herminio Martínez, Encarna García, and Juan Gámiz, Technical University of
Catalonia, Barcelona, Spain] |
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ST6: UNIVERSAL Motor Control EVALUATION BOARD - The UMC01EVAL Evaluation
Board is designed for a very low-cost phase control system based on the 8-bit ST62T00C
microcontroller. It can be used to control a universal motor powered by a 230 V / 50
Hz mains supply. (app note added 3/05) |
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Stereo Ducker - (electronic circuit added 7/03) |
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Strain Gage Measurement using an AC Excitation - AN-683-Analog Device
Application Notes....[App Note] |
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Subcarrier Adapter - Listen to those hidden FM transmissions…. [Tony van
Roon's circuit] |
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Synchronous Modulator - This unique circuit uses a very small amount of
battery current and has excellent carrier suppression. Its only shortcoming is that
you must limit the input signal to 0.7 Vp-p in order to prevent distortion. To use
higher input voltages, replace Q3 with a JFET. A MOSFET doesn’t do as well as an NPN
transistor. Designed by Andrew R. Morris (added 6/06) |
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Synchronous Modulator-1 - This is an OpAmp version of the synchronous
modulator I submitted earlier. It has more consistent performance over varying power
supply voltage than the discrete version, but it still has the 0.7 Vp-p limitation on
the maximum input voltage. You should use a JFET or a CMOS switch in place of Q1 if
you need to accommodate a higher input voltage....Designed by Andrew R. Morris
(added 6/06) |
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Synchronous System Measures µΩs - AN-306-Analog Device Application
Notes....[App Note]Synchronous Detection Scheme Measures Low Resistances |
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