This article is about Simple Time Delay LED Circuit using Transistor where the LED lit after a short wait; also the circuit needs transistor, capacitor and few resistors for delay. In addition , the circuit is good for power light, warning light and timing project and it work with 10V DC and fits many electronics. […]
Transistor Circuits
Simple 24V Lamp Flasher Circuit using Transistors
Simple 24V Lamp Flasher Circuit using Transistors makes 24V lamps blink back and forth with non stop, as it uses transistors to turn two lamps ON and OFF one by one like astable multivibrator. Also, this circuit is good for signal use like warning or decoration lights with steady blink, therefore, we must use 24V […]
Transistors Based Megaphone Circuit
To begin with, this Transistors Based Megaphone Circuit uses transistor like amplifier, as it take weak sound from MIC and makes loud sound in speaker. People also use it in public talks, sports events and rallies wherever they need a loud voice; the circuit additionally uses two TIP32 transistors in a push-pull configuration to boost […]
Adjustable Thermostat Circuit using IC LM56
An electronic adjustable thermostat controls temperature in heating or cooling systems, as this adjustable thermostat circuit uses the low-power IC LM56 chip to switch between two temperature modes. First, it controls outside transistor for output load and then IC LM56 give reliable, precise temperature control. Moreover, it is good for many uses like check temperature […]
Simple LED Alert for Telephone Off-Hook Detection Circuit
This simple LED circuit detects voltage drops when we lift the handset, actively turning ON an LED to show that our telephone is in use. Also, circuit is good for old phones with no light alert and it is very useful for shared phones and stops call interruptions. Here, circuit runs on simple 3V battery […]
Electromagnetic Telephone Ringer Circuit
Electromagnetic Telephone Ringer Circuit helps us know when call comes and when there is no need connect to phone line. Also, this circuit is useful when there is no access or do not want to touch phone line, as it works by sensing electromagnetic field from ringing signal and then buzzer turns ON; furthermore, the […]