Archives: Projects
Single Key Touch Sensor using LM2907
This is a single key device featuring a touch ON (Momentary) output. The project is built using the LM2907 chip. The board provides stable sensing and has a wide working power supply range 5V to 12V DC and consumes 20mA. D1 power LED, D2 function LED. Touch sensors are used in many...
Continue ReadingPWM Temperature Controlled FAN using TC648 and NTC sensor
The project described here is a switch mode fan speed controller for use with brushed or brushless DC motors. Temperature proportional speed control is accomplished using pulse width modulation (PWM). 10K Ohms NTC is used to sense the temperature. The project is built using TC648 chip...
Continue ReadingDC-HV DC Converter – 200V @ 20mA Output with 12V DC Input
This is a low-cost DC-HV DC converter built using TL3843 Low-Power Current-Mode PWM Controller from TI. Screw terminal connectors are provided for input and output, onboard LED D1 indicates the input supply. The project provides 200V DC @ 20mA output from 12V DC supply...
Continue ReadingDual 40W Audio Power Amplifier with Mute
The stereo audio amplifier project shown here is capable of delivering typically 40W per channel continuous average output power into an 8Ω load with less than 0.1% (THD+N). The project is built using an LM4766 chip from Texas Instruments, The performance of the LM4766, utilizing its...
Continue ReadingUnder Speed Warning Alarm for Magnetic Pickup sensor – Frequency Controlled Switch
This is an under-speed sensor module that provides an audible warning and signals output when the speed of a machine is below the set point. The module can be used in applications such as Engines, Machines, Sports machines, Fitness Equipment, Speed of the machine or engine can be...
Continue ReadingDC Motor Controller using Relay and MOSFET – Arduino Interface
The project presented here is a low-cost solution to control high power brushed DC motor speed and direction. Traditional DC motor controllers are based on solid-state circuitry known as H-Bridge. Here we have made an H-bridge configuration using high current 2 x relays which can...
Continue ReadingLow-Cost DC Motor Direction Controller with Fast Brake using 2 Relays
The project presented here is a low-cost easy to use DC brushed motor direction controller with fast-brake, the project was built using two 12V Relays, 2 x BJT transistors, and 2 x tactile switches. The two LEDs are provided to display the motor direction, 2 tactile switch controls...
Continue ReadingMultiple Output Power Source – Dual 10V (+/-10V), 5V DC, 3.3V DC from 9V Battery
This is a multiple output power converter module that provides +/-10V (Dual 10V), 5V DC, and 3.3V DC from a 9V PP3 battery. This is a very useful project that has been designed for low-load current applications. Dual +/-10V output from a 9V battery is a key feature of the project. The...
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