Voltage to Frequency Converter ICL8038

 Mixed-Circuits  No Responses »
Feb 192009
 

This was a small circuit made for driving an Impact counter. The heart being ICL8038. It must have been a Motor driving a Conveyor, the motor has a feedback attachment called Tachogenerator.

Voltage to Frequency Converter ICL8038

Only part of the circuit is shown here. See the image of product here Tacho Counter. The configuration is derived from the Application Notes of Intersil. The Voltage from Tachogenerator is Measured on a DPM-DVM and also fed to this circuit after attenuation and filtering. The square pulses of 8038 is used to derive a Logic pulse train for a CD4040. The CD4040 works of 0 and 12V. The above circuit is on +12 and -12. That is the reason R10-R15-Q1 are used. The pulses are 0-12V pulses. The Zero is Virtual like the Virtual Ground in low current power supplies.

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Square and Triangle Opamp Oscillator

 Opamp-Circuits  No Responses »
Oct 212008
 
Square and Triangle Opamp Oscillator

Here is the circuit of a Op-Amp based Square Wave Generator. One of the main application of this is in a Simple PWM circuit and Triangle Opamp Oscillator. The Slope of the Triangle wave is compared with a DC Level to derive a pulse width or On-Time proportional to a Voltage. This On-Time proportional to voltage is for a fixed oscillation rate based on C2-C3 and R15. The C2-C3 form a Unpolarized cap, This type is also used in crossover networks in speaker boxes. This is because, a plastic 4.7 uF (2 * 10uF series) is big and costlier, but Read More …

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Tubelight Electronic Choke

 Lighting-Circuits, Mains-Power  2 Responses »
Oct 122006
 
Tubelight Electronic Choke

This is an electronic choke for a Conventional Fluorescent Lamp. This was an application note of MJE13005 a High Voltage Switching NPN Power Transistor. I Might have modified it. This was very popular in the early days, The Coil Winding and Ferrite is very Critical design. The diodes, npn transistor and caps are high voltage 350V-1KV, The tubelight is 40W-60W 5 feet long. This circuit replaced the choke and starter in an existing frame. Read More. Fluorescent Lamp Ballast Electronic Ballasts! 40W Lamp Inverter Compact fluorescent lamp Producing Wound Components Transformer Design ePanorama Transformers Fluorescent Lamp

 Posted by admin at 7:14 AM  Tagged with:

Function Generator using ICL8038

 Mixed-Circuits, Test-Measurement  1 Response »
Jul 232006
 
Function Generator using ICL8038

Specifications Frequency range – 0.95 Hz to 105 KHz in five decade ranges Waveforms – Sine, Triangular and Square. Output amplitude – Adjustable from 10 mV PP. to 10 V PP Output impedance – 50 ohms. Datasheets ICL8038 waveform generator ICL8038 LM318 Operational Amplifier LM318 Circuits Electronics — ICL8038-based Oscillator Handy dandy little circuit #13 Glossary THD – Total Harmonic Distortion – Total harmonic distortion – Wikipedia, the free encyclopedia PP – Peak to Peak – RMS and peak – Peak-to-peak – Wikipedia, the free encyclopedia MFD – Micro Farad – Farad – Wikipedia, the free encyclopedia

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PLL using 4046 – Phase Locked Loop

 Mixed-Circuits  No Responses »
Jan 162005
 
PLL using 4046 - Phase Locked Loop

CD4046 is a PLL or phase lock loop, it mainly consists of a VCO and phase comparators. This is a component in FM demodulation and modulation. It is used in a closed loop control to maintain a stable frequency. The Circuit above is good for learning the full use of a small Dual Trace Scope. The Circuit has both Analog and Digital areas and is a part of communication. Phase-Locked Loop Tutorial, PLL Phase Locked Loop: PLL Tutorial on Digital Phase-Locked Loops Phase Locked Loop Basics Read the pages above for building more Knowledge on PLL

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VCO with LM331

 Mixed-Circuits  No Responses »
Jan 052005
 
VCO with LM331

This Circuit is a simple Analog to Digital Interface with a capability of 10 to 12 bits resolution. 10 bits means 1024 counts or parts of a full scale FS which is close to 3-1/2 1999 counts. In this 1 V can be read as 1.000 V that means even 1mV can be resolved for FS of 1V. The Caps C6 and others must be plastic multilayer low-leakage types for accuracy of reading. Use all 1% MFR 100ppm or better resistors, Design gain of U1B for the Full Scale you want. The Output Fout is a Frequency which is directly Read More …

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LM311 Square Triangle Oscillator for PWM

 Mixed-Circuits  No Responses »
Nov 082004
 
LM311 Square Triangle Oscillator for PWM

LM311 is a comparator, It operates from single 5V supply or dual supplies,input current 150 nA, 50 V-50 mA output drive capability. TTL-CMOS compatible output. The Output is open collector so it can sink current but cannot source, a totem pole output can source and sink. In this Circuit R2 is the source or pull-up. The Output being high or low depends on which input is more dominant or positive. If + or non-inverting input is more positive than the – inverting input then output of LM311 is high impedance or high Z as output transistor of LM311 is turned Read More …

 Posted by admin at 1:01 AM  Tagged with:
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