Archive for category: Control circuits

Hacks and Mods: Bluetooth Keyboard Controls Dancing Hexapod

Control circuits | By: Diagram mania

Presently, production of robots of different types and functions are rapidly created to help people make their life easier. We can even imagine how the world would look like on the next decade to come. That is – robots do most of the work that people used to do. Most of the bots in the […]

Hacks and Mods: Hacking Car Wipers for Easy Control

Control circuits | By: Diagram mania

How do you want to have your wipers become more intelligent? In this way, they could remember how frequent you need to use them. But of course, this will need the help of an ATmega8L microcontroller. When you need to activate the wiper, you just press the button and it will run in one course. […]

Hand Clap Electronic Control

Control circuits | By: Diagram mania

We have all seen the commercial on TV ………. CLAP – ON – CLAP – OFF – THE – CLAPPER ………… well here is a circuit that will perform that same function. Circuit operation is as follows. A single hand clap will be picked up by the electric mic which is coupled through C1 into […]

PC Fan Speed Controller – For a Low-Noise PC

Control circuits | By: Diagram mania

The fan runs constantly in many PCs, which may not even be necessary. A simple controller circuit can regulate the fan speed according to demand. This not only saves energy, it also reduces irritation from the fan noise. Only three components are needed to allow the fan speed to be controlled according to the actual […]

DC Fan Controller

Control circuits | By: Diagram mania

This circuit is ideal to control the cooling fan of heat generated electronic gadgets like power amplifiers. The circuit switches on a fan if it senses a temperature above the set level. The fan automatically turns off when the temperature returns to normal. The circuit uses an NTC (Negative Temperature Coefficient) Thermister to sense heat. […]

Rotative Speed Regulator Borer, Driller Controller

Control circuits | By: Diagram mania

This rotative speed regulator circuit schematic allows to control the holing speed of your borer or driller machine. This project is based on the fact that if the load grows, the voltage decrease and current increase. Use this circuit to control the speed of revolutions of your drilling mill or bench drill. Driller controller circuit […]

Kitchen Exhaust Fan Controller

Control circuits | By: Diagram mania

Exhaust fan is an important component in kitchens. Here is a simple circuit to control kitchen fans by monitoring the ambient temperature. It is built around the renowned precision integrated temperature sensor chip LM35 (IC1). Rest of the circuit is a non-traditional electromagnetic relay driver wired around the popular LED driver LM3914 (IC2). User can […]

On-off Infrared Remote Control

Control circuits | By: Diagram mania

Most homes today have at least a few infrared remote controls, whether they be for the television, the video recorder, the stereo, etc. Despite that fact, who among us has not cursed the light that remained lit after we just sat down in a comfortable chair to watch a good film? This project proposes to […]

Beam-break Detector For Camera Shutter or Flash Control

Control circuits | By: Diagram mania

This circuit is presented as an alternative to the IR beam break detector featured in the June 2009 issue (Silicon Chip). In order to make it relatively insensitive to ambient light, it uses a standard IR receiver IC such as the Jaycar ZD-1942. This has a high output (+5V) as long as a modulated beam […]

Smart Heater Controller

Control circuits | By: Diagram mania

Minuscule circuit of the electronic heater controller presented here is built around the renowned 3-Pin Integrated Temperature Sensor LM35 (IC1) from NSC. Besides, a popular Bi Mos Op-amp CA3140 (IC2) is used to sense the status of the temperature sensor IC1, which also controls a solid-state switch formed by a high power Triac BT136. Resistive […]