To begin with, this circuit shows a small audio amplifier which uses two BJT NPN transistors, they works with low impedance output like small speaker or earphone. Also, the circuit takes weak input signal and makes it stronger and runs on DC supply from +6V to +18V, as the circuit is simple, low cost and […]
DIY Projects
Car LED Voltmeter Circuit using IC LM324
Car LED Voltmeter Circuit using IC LM324 is useful project to check car battery voltage, here, LEDs show different voltage which is easy to see battery condition. Main part are LM324 op-amp which act like voltage checker and voltmeter measures voltage between two points. Hence, this circuit is an LED voltmeter using the IC LM324 […]
Battery Level Indicator Circuit using IC MN13811
This tutorial teaches us about Battery Level Indicator Circuit using IC MN1381, as it shows when battery is low and indicates us to recharge, so use MN13811 IC and 2 transistors as they work together to turn ON the LED when battery is low. Also, the circuit is good for small 3V battery devices, as […]
Advanced Ni-Cd Battery Fast Charging Circuit
Many devices use Ni-Cd batteries because they provide good energy storage and can be recharged; however, normal charging is slow and inefficient and it can reduce battery life. To fix this, we design an Advanced Ni-Cd Battery Fast Charging Circuit using the MAX712 chip, also this charger provides fast, safe and reliable charging for Ni-Cd […]
Battery Charger Circuit using IC LM317
Battery Charger Circuit using IC LM317 is an useful project in electronics, it charges rechargeable batteries well. The main part is the LM317 IC, a voltage regulator used in power supplies and battery charging, it also works well for charging 12V lead-acid batteries. This post show how LM317 IC charger works, what calculations to use […]
Battery Charger Circuit using IC L200
This article talks about a very useful and easy Battery Charger Circuit using IC L200 which helps battery work good and live long. Furthermore, this circuit show reverse polarity using LEDs. IC L200 is 5 pin voltage regulator which is very flexible and good for charging battery and also this IC have many features like […]