Schematics List

Analog Circuits Battery Level Indicator Simple Sample and Hold Sample and Hold Standby Voltmeter Attenuator Precision Current Source Opamp Supply Virtual Ground SCR and Triac Solid State Relay Normally Closed AC SSR AC-AC-SSR DC-DC SSR 2N2646 based Pulser Drive SCR thyristor Mains Power Flashing Neon Lamp Dimmer power control Edison Bulb Life Extend Mains Current LED Mains Voltage LED	Digital Circuits Simple Digital Counter Running Lights Frequency Divider Crystal Oscillator Simple High speed switch Differential TTL converter Measureall DMM Ohmmeter Measure Resistance Precision Digital Attenuator Precision Amplifier Mixed Circuits Monostable Multivibrator Digital to Analog LM311 Oscillator PLL using 4046 VCO with LM331 BCD Thumbwheel to Analog V to F Converter ICL8038	555 Circuits OR gate with two 555 fixed frequency duty cycle Pulse width modulation Astable Multivibrator uC Reset Generator LM555 Voltage Doubler 555 Power Oscillator Discrete Circuits Isolated dual supply Sound to light converter Water operated relay Telephone Indicator Passive volume control RS232 Opto-Isolation Voltage Level Indicator Relay Driver Constant Current LED Voltage Doubler FET Current Source
Opamp Circuits Three Opamp Differential Two Opamp Differential Buffer Opamps Differential Op-Amp Inverting Opamp Non Inverting Opamp Digital gain control Square Triangle Oscillator Dual Polarity Output Amps Ammeter Precision Rectifier Voltage / Current 4-20 mA Current Source for RTD	Power Electronics Dual Power Supply Single Power Supply Battery Backup Supply 5V 1A Supply LM2575 5V Power Supply L296 Dual Power Supply Tubelight Electronic Choke Voltage Doublers Multipliers White LED Lamp on Ni-Cd uC and uP PC RS232 with MAX232A Battery Backup SRAM watchdog uC uP systems	Instrumentation Circuits Mains monitor LM3914 Simple Mains monitor single digit voltmeter High Resistance Meter Diode Thermometer Function Generator Diode Leakage Tester Analog LED Ohm Meter Millivolt Source Current Loop Process Control AD590 - temperature Thermocouple Amplifier Linearizing Thermocouple Thermocouple Amplifier 0-1V to 4-20 mA 1-5V to 4-20 mA InfraRed - Optical Switch InfraRed Detector