Pulse Lighting/Strobbing with Arduino(using DIP switch LCD and transistor)
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LED display unit
For several recent projects, a request was made to provide engaging and informative display units. A versatile unit was developed that can be utilized across different applications. It was designed for aesthetic appeal, capable of displaying both graphics and text,...
mosfet Turning a microcontroller on with a flip flop
The objective is to control the power to a load, specifically an 8051-based microcontroller (uC), using two switches. When the uC is powered on, it sets the PWR pin high. Upon pressing the switches again, pin 4 of the flip-flop...
TYPICAL TRANSISTOR CIRCUIT
This is a silicon transistor circuit showing typical voltage values. When the forward base/emitter voltage is 0.6 to 0.7 V, the transistor is silicon. Germanium transistors will have a forward base/emitter bias voltage of 0.2 to 0.3 V. This is...
audio Using a microphone with an Arduino
This project requires expensive hardware, including a microphone and amplifier, along with sophisticated audio analysis on the microcontroller. Even a complete microphone with an amplifier circuit does not yield the desired results, as noted in the product comments. The individual...
1.5 Volt LED Flasher Circuits
The LED flasher circuits below operate on a single 1.5 volt battery. The circuit on the upper right uses the popular LM3909 LED flasher IC and requires only a timing capacitor and LED. The top left circuit, designed by Andre...
Tickler oscillator circuit
When the circuit is initially powered, neither transistor is activated, resulting in high base voltages for both and a tendency to turn on. Due to slight asymmetries, one transistor will activate first, leading the circuit into one of its states...
transistors audio controlled relay circuit
A circuit that activates a relay upon detecting audio pulses from one channel of an MP3 player. The intention is to synchronize recorded audio pulses with music to control a motor for mouth movement. For a stereo player, music or...
Scrchaser
Each lamp lights in succession to give the appearance of a growing column.
The described circuit features a sequential lighting system designed to illuminate a series of lamps in a cascading manner, creating the visual effect of a growing column of...
small bare bone arduino bluduino
There are many bare-bones Arduinos available on the internet. Most of them are assembled on a solderless breadboard and utilize an ATmega168 (or ATmega328) microcontroller with an Arduino bootloader, a resonator (which may have built-in capacitors or require two external...