BMS 3S 25A is frequently used especially for Li-ion battery conversion of cordless drills. Its prominent features are balanced charging, over-current, short-circuit protection, allowing instantaneous 34-40A current flow, which is very good for high-power applications, and the PCB size is very small and the mosfets are cooled over the PCB. (although a heatsink may be…
STM32F103, STM32F303, ATmega32, ATmega328p Amplifier control project is a control module for your audio amplifier. It supports various I²C/SPI controlled sound processors and FM tuners. All source codes and PCB drawings have been shared. It also has an LCD spectrum analyzer. TDAXXXX is a great source for PTXXXX digital audio control ICs. Library, code files…
The advantages of lithium batteries are many, first of all, high power, low weight and no “memory effect”. Also, a lithium battery has three times the voltage of a nickel-cadmium or nickel-metal hydride battery (1.2V). However, lithium batteries cannot be used safely and efficiently without special control systems. The first version of the Li-Ion Battery…
The combination lock circuit displays the information and settings entered from the keypad built on the PIC18F4620 microcontroller on the LCD screen. All user password information settings are kept in the memory of the PIC18F4620 keypad is connected to the microcontroller via the 74C922 IC. Circuit description; An apartment lock system where the administrator can…
The control card made for the transformer winding machine can control the winding from 0 to 99.999 turns with 5 steps. You can use common cathode or common anode Led display. 6 buttons are used to control functions. The heart of the circuit is the PIC16F628 Microcontroller IC. The set number of rounds is saved…
Built on stereo tone control circuit TL072, LM358 Opams PCB dimensions are small 56x68mm. The supply voltage of the tone control circuit is unipolar. A virtual ground is created with the LM358 opamp. The voltage is connected according to the follower circuit. Using the voltage divider R3R4, half the supply voltage is applied to the…
The subwoofer filter, or low-pass filter, is designed to suppress high frequencies that shouldn’t be fed into the audio amplifier’s input and then into the low-frequency head (woofer, subwoofer). The subwoofer filter has a cutoff frequency. A signal input to the filter with a frequency greater than the cutoff frequency will be attenuated. These signals…
A 2X16 LCD screen is used to display the data based on the weekly timer circuit PIC16F628A microcontroller and the DS1302 real time clock IC. There are different software for using 1.7 Channel without changing the PCB drawing. Relays 12V 10A Clock, calendar, 4 buttons are used for on-off settings of relays. The current drawn…
PT2240, PT2262, HT6P20B RF Transceiver ICs were cloned as software and application circuits were made with microcontroller. Clone circuits may be higher in cost, but it is a very good resource in terms of software. It is very difficult to put the working system of ICs such as PT2240, PT2262 into software. HT6P20B PT2240 PT2262…
The high-power control circuit motor reversing DC motor speed controller circuit features soft start, relay switching of motor direction, and PWM speed control. I have shared the circuit before. There are details in the article “High Power 30 Amp DC Motor Speed Control Circuit”, but I prepared a new article because I applied it and…