12vdc to 220v ac Inverter Circuits CMOS 4047 is the main component of this small voltage converter which transforms a 12V dc into 220V ac. 4047 is used as a astable mutivibrator, at pins 10 and 11 will have a symmetrical rectangular signal wich is amplified b 2 Darlington transistors and finally reach the secondary [...]
schematic+rs232+ke+rs485
This Robot use two motors control rear wheels and the single front wheel is free. It has 4-infrared sensors on the bottom for detect black tracking tape, when the sensors detected black color, output of comparator, LM324 is low logic and the other the output is high. Microcontrollor AT89C2051 and H-Bridge driver L293D were used [...]
OUTPUT: enter no of processes: 5 enter process1 name: aaa enter process time: 4 enter process2 name: bbb enter process time: 3 enter process3 name: ccc enter process time: 2 enter process4 name: ddd enter process time: 5 enter process5 name: eee enter process time: 1 p_name P_time w_time eee 1 0 ccc 2 1 [...]
This battery charger is for 12V Seales Lead Acid (SLA) battery. It is actually a half-wave rectifier. It only charges the battery on every half cycle. The plug pack doesn’t like this as it leaves residual flux in the core of the transformer and causes it to overheat. There are a number of points we [...]
High frequency waveform generator is very useful in electronic experiment and design. This circuit generate sine wave oscillation, but actually we can modify the circuit to generate triangle or square wave function. The core of this waveform generator is MAX038. This integrated circuit chip gives complete function to build a waveform generator/function generator. The circuit [...]
