Learn and build electronic circuits
Making a circuit to control a DC motor speed may look easy, but having a circuit which can provide enough torque to the motor even at lower speeds may not be so simple. In this post we discus how to build a simple DC motor speed controller circuit which can provide sufficient power or torque … Read more
One of the widely used electronic devices are servos or also known as servo motors. These components are compact, almost weightless, cost-friendly and incredibly easy to use. In model building, servos are connected straight to an RF receiver unit. They usually occupy three connections namely the positive supply (+5 V), ground (GND) and control (Pulse) … Read more
This straightforward circuit is developed for controlling all forms of high current DC motors that is rated up to 40 A. Fundamentally, it’s just a standard oscillator triggering a handful of power MOSFETs. The oscillator is a basic RC-type about a sole Schmitt trigger component (IC1a) from a 40106 hex inverter package. When the wiper … Read more
The servomotor driver and tester unit might excite two types of electronic enthusiasts namely model vehicle owners and robotic system builders. As shown in the diagram, the circuit equips a standard 555 or 7555 timer chip. This IC is configured so that the circuit can drive two or more servomotors simultaneously. You may also notice … Read more
A lot of model railway controllers possess the regrettable features of providing immediate starts and stops to the train which can make the model passengers nervous. The model train controller circuit explained provides a constant acceleration or deceleration on speed variations, and also the speed and acceleration controls do not interact. The power supply is … Read more
Automatic opening and closing doors normally don’t get much attention since they involves complex mechanisms. But still a few innovative people have attempted to set an automatic sliding door in their bedroom. If you are satisfied with relatively slow movement of the sliding door, you can easily install this system with the help of a … Read more