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Active Voltage Positioning Reduces Output Capacitors - DN224 Design Notes (Linear
Technology) (app note added 1/06) |
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Apex-AN02 Optoelectronic Position Control - Apex App Note (added 2/06) |
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Apex-AN08 Optimizing Output Power - 3/2007, AN8UREVC : 241 Kb (Apex App Note added
08/08/08) |
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Apex-AN19 Stability for Power Amplifiers - 11/2004, AN19UREVC : 1369 Kb (Apex App
Note added 08/08/08) |
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Autozero a position sensing detector - 03/18/99 EDN-Design Ideas / (added 8/03)
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Autozeroed amplifier with halved noise needs few components - (Design Ideas - EDN,
10/25/2007) The unique architecture of the Analog Devices AD8553 instrumentation
amplifier permits paralleling devices to lower noise. (electronic design idea added
9/2008) |
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Biasing Corrects Position Sensing Photodiode - (07/04/94 EDN-Design Ideas / (added
3/03) An integrator powers light source in Fig 1's position-sensing circuit,
eliminating errors arising from variations in source's intensity. This circuit's
accuracy is essentially that of sensor itself, beating designs that use a more
complex analog divider.... |
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Digital Position Encoder Does Away with ADC - 05/08/97 EDN-Design Ideas / (added
3/03) |
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Honeybee Counter - I designed a circuit similar to this one a long time ago to
help a beekeeper count the number of bees going into or out of a hive. The low power
circuit uses a slotted opto-sensor to detect the passing bees. The circuit advances an
electronic counting module whenever a honeybee passes through the sensor. The device
only counts the number of bees going through the sensor. A different circuit would be
needed to count the number of bees only going out or only coming into the hive.
….(designed by David A. Johnson) |
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Optical Interrupter Draws Microamps - This circuit is great for battery-powered
systems that use slotted type optical interrupters. It draws only 10uA from a 3v
battery that should allow up to 5 years of operation from a lithium battery.
….(designed by David A. Johnson) |
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Park Aid - 3-LEDs signal bumper-barrier distance Infrared operation, indoor use
(added 9/04) |
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Position detectors provide motor control logic - 05/24/01 EDN-Design Ideas /
(added 8/03) In the circuit of Figure 1 , assume that a brush-type dc motor must drive
a load back and forth between two endpoints on a lead screw. Optical sensors determine
end of travel, and an SPDT switch selects to which end to send the load. The sensors
themselves supply all the necessary directional logic, and a triac powers the motor
with the necessary polarity of half-wave pulses from the 13. |
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Position Encoder Does Away with ADC - 05/08/97 EDN-Design Ideas / (added 3/03) |
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Rotary Controller Positions Stepping Motor - 08/03/95 EDN-Design Ideas / (added
3/03) |
