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Heater Fan Controller - This device acts as a variable speed control
for the heater blower in a car. It takes its power directly from the existing
wiring and connects with just 2 wires…. [Luhan Monat - Mesa Arizona] |
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Heating System Thermostat - Controlled by indoor and outdoor
temperature. Simple, high reliability design. (circuit added 9/04)
|
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High Accuracy RPM-Measurement with 68HC12 - ….(Circuit design added
06/09) |
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High Accuracy Synchronous Step-Down Controller Provides Output Tracking &
Programmable Margining - DN364 Design Notes (Linear
Technology) (app note added 1/06) |
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High current bipolar stepper Motor Controller - (design idea circuit
added 09/08) |
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High side PWM Motor/Light Controller - These two schematics are
variations on another PWM circuit that I designed. The diagrams are for 12V
operation only and there are high side (common ground) and low side (common
+12V) versions. The low side version of the circuit uses an N Channel FET, the
high side version of the circuit uses a P Channel FET. N Channel devices tend
to handle more current than P Channel devices, they are also less expensive.
The high side version of the circuit is useful when one side of the load has
to be grounded..... [Circuit Designed by G. Forrest Cook] |
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High Voltage Ring Generator - Supertex Semiconductors (app
note added 2/06) |
| High-Frequency AGC has Digital Control -
05/21/98 EDN-Design Ideas As FPGA capabilities increase and time to
market decreases, FPGAs gain more acceptance for implementing both data and
control paths. Thus, they find wide use as controllers and datapath glue logic
for fast-page DRAMs. Synchronous DRAMs (SDRAMs], whose.... [Design Idea by Ron
Mancini, Harris Semiconductor, Melbourne, FL] |
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High-Rate Electronic Speed Control with BEC & Brake - This
electronic speed control (ESC) for brushed motors combines the features of two
of my earlier designs. One was a high-rate 30A ESC with a brake, and the other
a high-rate 12A ESC with a BEC (receiver battery eliminator circuit)…..
[Stefan Vorketter] |
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High-Rate Speed Control with Brake - Many designs for high-rate
speed controls have been published. Most require two 8-pin integrated circuits
(ICs) or one 14-pin IC. Many designs suitable for home construction are fairly
large (some as large as 2" square)…. [Stefan Vorketter] |
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Home Built Laser Projector - Laser projector is one of the laser
display equipments. This project builds the closed-loop galvos mainly
and aiming at professional grade. (added 10/05) |
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Hot Swap & Blocking FET Control using 2 x ADM1073 Hot Swap Controllers -
AN-694 Analog Devices Application Note (app note added 2/06)
|
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Hot Swap Circuit Meets Infiniband Specification - DN265 Design
Notes (Linear Technology) (app note added 2/06) |
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Hot-swap controller handles dual polarity - 11-Dec-03 Issue of EDN
Some applications require a hot-swap controller, a circuit-breaker function,
or both for dual-polarity, dc-input power-supply rails. In some hot-swap
cases, the requirement is based only on inrush-current considerations. Control
of the inrush current is necessary to eliminate connector stress and glitching
of the power-supply rails.... [Design Idea by Dan Meeks, Texas Instruments,
Manchester, NH] |
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How to Build a 300MHz AM RF Remote Control System - (electronic
circuit added 4/05) |
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How to record telephone conversations - Sometimes it is useful to
record telephone conversations. The easiest way is to go to a shop and buy a
telephone conversation recording adapter which is connected between telephone
line and the tape recorder. Those recording adapters are usually connected
between telephone line and the telephone, but there are also other type
available....(electronic circuit added 10/05) |
