Designer

Multi Channel Mixer

published on 01-12-2011

8 channels mixer implemented with low noise, audio, high speed and precision operational amplifiers as the LM833, TL071, OP27C, the ultralow THD integrated audio preamplifier SSM2017P and the led driver LM3915

FREE

(only to registered users)

Project Type: Free

Complexity	Spice Software	Software Version	Full version	Components number
Advanced	Altium Designer	summer09+	Yes	>100

Path: SPICE Projects > Audio Circuits > Audio Effects Circuits

Transmission Line Lossless

published on 10-10-2011

Pulse voltage in a lossless trasmission line.

FREE

(only to registered users)

Project Type: Free

Complexity	Spice Software	Software Version	Full version	Components number
Very Simple	Altium Designer	summer09+	No	<10

Path: SPICE Projects > Transmission Lines

Full Bridge Converter with UC1825

published on 20-08-2011

UC1845 high speed PWM controller, 400V input voltage with a separate 12 V supply, 48V output voltage capable of up to 14 A, in full bridge configuration with 4 power mosfet IRF840.

FREE

(only to registered users)

Project Type: Free

Complexity	Spice Software	Software Version	Full version	Components number
Advanced	Altium Designer	summer09+	Yes	51-100

Path: SPICE Projects > Power And Battery Circuits > Switching Power Supplies

3,5795 Mhz Crystal Oscillator

published on 08-08-2011

A crystal oscillator implemented with a fixed frequency quartz and two complementary MOSFETs.

FREE

(only to registered users)

Project Type: Free

Complexity	Spice Software	Software Version	Full version	Components number
Simple	Altium Designer	summer09+	Yes	<10

Path: SPICE Projects > Signal Generation Circuits

1khz BandPass filter

published on 02-08-2011

1 khz Active filter implemented with a 741 operational amplifier with dual power supply.A square wave signal is filtered to select the first harmonic.

FREE

(only to registered users)

Project Type: Free

Complexity	Spice Software	Software Version	Full version	Components number
Simple	Altium Designer	summer09+	Yes	<10

Path: SPICE Projects > General Electronics > Active filters

BCD to 7 segment Display Decoder

published on 26-07-2011

BCD (Binary Coded Decimal) codes with 4 bits ten patterns that represents digits from 0 to 9, (0000 to 1001).The decoder takes as input the 4 bits and switches on or off the seven leds or segments of the display, coding the right digit.The segment are active when the input voltage to the segment is low.

FREE

(only to registered users)

Project Type: Free

Complexity	Spice Software	Software Version	Full version	Components number
Intermediate	Altium Designer	summer09+	Yes	31-50

Path: SPICE Projects > General Electronics > Digital Basic Components

Analog relay

published on 25-07-2011

An analog relay controlled by an input voltage pulse, works as a switch between two voltage dividers, providing an output of 4 or 6V.

FREE

(only to registered users)

Project Type: Free

Complexity	Spice Software	Software Version	Full version	Components number
Very Simple	Altium Designer	summer09+	Yes	<10

Path: SPICE Projects > General Electronics > Analog Components > Relays

555 Astable Multivibrator

published on 25-07-2011

Square wave generator with a frequency fixed by the external components to IC 555.F= 1.45/[(RA+2*RB)*Ct].The time when the output is high is given by Th= 0.693*(RA+RB)*Ct, the time when the output is low is Tl= 0.693*RB*Ct.The total period T = Th + Tl = 1/F.

FREE

(only to registered users)

Project Type: Free

Complexity	Spice Software	Software Version	Full version	Components number
Simple	Altium Designer	summero09+	Yes	<10

Path: SPICE Projects > Signal Generation Circuits

Variable Band Pass filter with potentiometer

published on 22-07-2011

A 5 khz Band pass filter with frequency given by 1/(6.28*SQRT(L * C)).A potentiometer changes the shape of the filter response.A second sweep analysis with a variable capacitor change the band pass frequency.

FREE

(only to registered users)

Project Type: Free

Complexity	Spice Software	Software Version	Full version	Components number
Simple	Altium Designer	summer09+	Yes	<10

Path: SPICE Projects > General Electronics > Passive Filters

Detailed Model of 741 operational amplifier

published on 20-07-2011

the 741 operational amplifier modeled with controlled generators in inverting configuration.The DC gain is given by the ratio Rf/Ri, where Rf is the feedback resistance and the Ri is the input resistance.

FREE

(only to registered users)

Project Type: Free

Complexity	Spice Software	Software Version	Full version	Components number
Intermediate	Altium Designer	summero09+	Yes	31-50

Path: SPICE Projects > General Electronics > Operational Amplifiers

Tuned Amplifer with BJT

published on 19-07-2011

Tuned amplifier with fixed frequency.The "Tank" resonant circuit selects the frequency that is 1/(6,28 * SQRT(L * C) ), in this circuit, 160 khz. Common emitter configuration with emitter capacitor.

FREE

(only to registered users)

Project Type: Free