Description. Here is the circuit diagram of a 30V/3A adjustable regulator using the LM723 IC from the National Semiconductors. LM723 is an integrated series regulator whose output voltage…
Description. The circuit shown here is of a TV antenna booster based on the transistor BF180. The circuit operates in the UHF band and has a gain of…
Description This is the schematics of a low cost mic mixer that can be assembled from the components in your junk box.This two channel mike mixer is designed…
Description. This is a very versatile voice modulator circuit using IC HT8950A from Holtek Semiconductors. The IC is capable of creating 7 upward or downward steps on the…
Description. This is a simple and easy to construct digital dice circuit. The circuit is based on a single IC, CD4060B.The dice consists of six LEDs marked D1…
Description. Here is the circuit diagram of an ultrasonic mosquito repeller.The circuit is based on the theory that insects like mosquito can be repelled by using sound frequencies…
Description. Here is a simple circuit using IC LM 350, which can be used for charging 12V lead acid batteries. This circuit is perfect for “constant charging” 12V…
Description. Here is a simple but effective intercom circuit that is based fully on transistors.The circuit is based on a three stage RC coupled amplifier. When the pushbutton…
Description. Here is a versatile remote controlled appliance switch that can ON or OFF any appliance connected to it using a TV remote. IR remote sensor IC TSOP…
Description. The circuit given here can be used to control the brightness of low power incandescent lamps. The circuit is based on IC NE555 which is wired as…
Description. This is a simple approach to obtain a 12V and 5V DC power supply using a single circuit. The circuit uses two ICs 7812(IC1) and 7805 (IC2)…
Descrption. This is a simple circuit in which the glowing LED can be switched OFF just by a puff. A condenser mic (M1) is used to sense your…
Description. This simple circuit can be used as an aid for sensing the distance between the rear bumper of the car and any obstacle behind the car. The…
Description. Here is a simple yet powerful circuit that can be used for flashing 12V lamps especially that is used on automobiles.The flashing circuit is based on transistor…
Description. Here is a simple circuit based on two transistors that can be used to control the speed of a 12 V DC fan depending on the temperature.A…
Description. This timer circuit can be used to switch OFF a particular device after around 35 minutes. The circuit can be used to switch OFF devices like radio,…
Description. Here is a simple circuit that can be used to pulse an LED or a low power filament lamp. The effect is such that the LED lights…
Description. The circuit given below shows a negative reference voltage supply.The reference voltage can be set to precise values by R2. The circuit operates in the same manner…
Description. The circuit given below is a variable positive voltage reference supply.The reference voltage can be set to precise values by R2.Basically the circuit is a DC amplifier…
AIM To add two 8 bit numbers using 8085 microprocessor PROGRAM MV1 C,00 LDA 4200 MOV B,A LDA 4201 ADD B JNC LABEL1 INRC LABEL1:STA 4202 MOV A,C…
In our experiments we used Micro 85 EB trainer kit from Vi Micro systems. The steps involved in doing programs in trainer kit are summarized below.…
AIM To design and setup a UJT relaxation oscillator. COMPONENTS AND EQUIPMENTS NEEDED 1. UJT (2N2446) 2. Resistors 3. Capacitor 4. CRO 4. DC power supply CIRCUIT DIAGRAM…
AIM To plot the characteristics of UJT (2N 2446) and to determine the intrinsic stand off ratio from the graph. COMPONENTS AND EQUIPMENTS REQUIRED 1. UJT…
AIM To plot the characteristics of BC 107 transistor and to find 1. Dynamic input resistance 2. Dynamic output resistance 3. Common emitter current gain COMPONENTS AND…
AIM To design and setup an RC integrator and differentiator circuits COMPONENTS AND EQUIPMENTS REQUIRED 1. Capacitors 2. Resistors 3. Signal generator 4. CRO CIRCUIT DIAGRAM…