| Analog
circuits |
|
120VAC LINE POWERED WHITE LEDs pdf file |
|
AC Line
powered LEDs The circuit below illustrats powering a LED (or two) from the
120 volt AC line using a capacitor to drop the voltage and a small resistor to
limit the inrush current |
|
Astable multivibrator |
|
Astable multivibrator
astable flip-flop circuits |
|
Astable Multivibrator
Projects |
|
Barry's Coilgun design site
design a coilgun to launch a small mass using electromagnets |
| Bicycle back safety light
this circuit has been designed to provide a clearly visible light, formed by 13 high efficiency flashing LEDs arranged in a pseudo-rotating order. Due to low
voltage, low drain battery operation and small size, the device is suitable for mounting on bicycles as a back light, or to put on by jogger/walkers |
| Capacitance multiplier power supply
a simple capacitance multiplier power supply for class A amplifiers |
|
Dynamo-Powered LED Headlight and Tail Light for your Bicycle Three classes
of LED light systems are presented: Basic, Medium Power and High Power,
a tip |
| Electronic
circuits application garage ultra high accuracy digital clock, channel adapter for the oscilloscope, count down timer, stabilised power unit, dancing lights,
ultra sonic range meter, supersonic alarm, infrared sensor, DC/AC inverter, supersonic range meter using PIC |
|
Emergency Lighting Fluorescent Lamp 8W emergency lighting converter circuit, pdf file |
|
Field Effect
Transistor as a Voltage Controlled Resistor An fet can be used as a voltage
controlled resistor (vcr) where the resistance between the drain and source is
controlled by the gate-source voltage, ... |
|
Flasher Circuits
Two Transistor Flasher Ideas |
|
"high" or "low" voltage battery monitor
LM741, scroll down |
|
Sawtooth wave oscillator
the sawtooth wave oscillator which used the operational amplifier (TL082) |
|
Triggered spark gap this device is used to switch high current voltages |
|
Triggered spark gap
BUILDING THE TRIGGERED SPARK GAP, pdf file |
| HV
generator using a TV flyback transformer HV generator using a TV flyback
transformer circuit |
|
LED torch
based on a 7555 timer running in astable mode |
|
Lie
detector circuit this circuit is based on the fact that a person's skin
resistance changes when they sweat (sweating because they're lying). Dry skin
has a resistance of about 1 million ohms, whereas the resistance of moist skin
is reduced by a factor of ten or more,
Simple lie detector |
| Magnetic
gun a miniature magnetic gun circuit |
|
Model train -
railroad and misc. electronics detector, detection, model railroads,
signals, railway circuit, trains, automatic, reverse, electronics, control, switch
machine, throttles, DCC, MiniDCC, circuit, trains, infrared circuit, stepper motor,
timer, 555, LM555, LM556, 74194, 74154, LM311, LMD18200 circuit |
|
Model
train diesel & horn sound module TIL 112 opto isolator, 741, LM566
VCO, CD4017 CMOS counter, LM386 power amplifier, LM556 dual timer |
| Multiple
monitor
driver Multiple monitor driver |
| Over
voltage protection provides a
useful defence for fast over voltage spikes and transients that could cause
damage to more sensitive components |
| Relay
card relay card interface circuit |
|
Sawtooth to Triangle converter |
|
Schmidt trigger
met transistoren, in Dutch |
|
Single-Supply Wien Bridge Oscillator |
|
Single
transistor pump This is a simple circuit that can produce a staircase
voltage output given a periodic pulse input |
| Soft
start up circuit Soft start up circuit |
| Transistor circuits |
|
Transistor
throttles power supplies, direct current power supply, voltage comparator,
variable pulse with modulated power supply, current regulated power supply
circuit |
|
Triangle to
sine converter Triangle to sine converter |
|
Two Transistor Flasher
circuit |
|
Variable Frequency Audio
Oscillator Variable Frequency Audio Oscillator circuit |
|
Voltage Controlled Low Frequency Oscillator with Sync Voltage Controlled Low
Frequency Oscillator with Sync |
|
Voltage
controlled
oscillator VCO, Voltage controlled oscillator circuit,
pdf file |
|
Voltage
protection |
|
Wien-Bridge Oscillator
15Hz - 150kHz |
|
Horizontaal |
|
|
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Last update:
2009-01-14
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