Rongge

The only thing to do is connect the battery and press the 'Start' button. When the discharge cycle is finished the circuit switches over to charge for 15 hours. After the 15 hours the circuits maintains a trickle charge to keep the battery 'topped-up'.  9V Automatic Battery NiCd Charger Circuit Diagram Before I go into the schematic details I like to explain some of the component descriptions in the schematic. Jan Hamer lives in the Netherlands and so the circuit details are based on european standards. 120E, 150E, etc. The 'E' just stands for Ohms so 120 ohm, 150 ohm. The original circuit specified the HEF type of cmos IC's which are not readily available in most of Canada. So just get any other type of CMOS chip like the MC4011, MC4020, MC4047 from Motorola. Any other type will do fine too. The BC548B is replaceble by a NTE123AP (NOTE: make sure it is the 'AP' type, the regular NTE123A is a total different transistor), ECG123AP, and the 2N3904 will...

How to build a automatic lighting controller circuit. The governor following is intended to regulate the light intensity incandescent 220 V. The components in a relatively few, which means it can easily be mounted onto a small plate. After the build, we recommend you place it inside the box which is flush mounted switch ON / OFF the lamp. Setting the switch to ON, the lamp will light after about 400 msec, a delay is probably negligible. Automatic Lighting Controller Circuit Diagram: But when the state enters the ON OFF, then mesolathei a period of 20 sec, the brightness of the lamp remains unchanged to start falling out soon after.  The last feature is particularly useful when we want to have a little time from the moment you 'close' switch. Once the switch S1 set to ON, the capacitor C2 begins to charge through R1, C1 and bridge D1-D4. The Zener diode D5 limits the voltage across the capacitor to about 15 n. After awhile, the diode D6 LED illuminates, causing the appearance of...

The process of charging batteries / battery dry using a series of Automatic Dry Cell Charger (Battery Charger Automatic Dry) uses a pulse system charging current and peak voltage detector batteries dry in the position of full charge. pulse generator circuit in the "Automatic Dry Cell Charger (Battery Charger Automatic Dry)" was built using NAND gates.  Meanwhile, as the position of full chargenya voltage detector using IC 741 that is set as a comparator with a reference value of full charge battery voltage. So the series Automatic Dry Cell Charger (Battery Charger Automatic Dry) is a dry battery charger that can be used to charge battery charger (battery) that is safe and dry will automatically cut off when the battery charging process has been fully dry. Automatic accu charger schematics Automatic Dry Cell Charger (Battery Charger Automatic Dry) above the reading level of the battery voltage via pin 2 of IC 741 to compare with a reference voltage which is determined based on...

This circuit has been very useful in filling a header tank for a reticulated water supply on a farm. Eight troughs are supplied in different paddocks where a lack of water would have serious consequences for the stock. In the past, the tank had been filled daily by a time clock which was not successful. During hot weather, the stock would empty the tank on a regular basis and then be without water for several hours or the tank would overflow and flood the area if the weather was wet and the cattle did not drink much. Circuit Diagram: The circuit described has been used to maintain the level of water in the header tank within prescribed limits. It controls a 3HP submersible bore pump which has a high starting current, necessitating a solid-state relay sufficient to take the starting load. Two Darlington transistors, Q1 & Q3, in conjunction with Q2 & Q4, are connected to the upper and lower water sensors in the tank. Q2 & Q4 have a common 5.6kO load resistor and function as a...

The circuit is based on a 555 IC (Bipolar or CMOS) for sensing the minimum and maximum water levels and turns a MOSFET on/off which directly controls a 12V DC pump motor. Or, it can power a relay coil to switch high currents/voltages, DC or AC. ‘Trigger’ and ‘Threshold’ pins (2 & 6) are used to detect the maximum and minimum levels, respectively. The two voltage comparator op-amps inside the 555 control the output, turning it on/off. Looking at the circuit diagram you will notice that the ‘Trigger’ pin (2) is marked ‘HIGH probe’, despite being triggered (output goes HIGH) when the voltage drops below 1/3 of the supply voltage and, the ‘Threshold’ pin (6) is marked ‘LOW probe’ while it is ‘reset’ (output goes LOW) when the voltage rises above 2/3 of the supply voltage. The circuit works as follows: Three (3) probes are immersed in the vessel. (usually from the top) One is the ‘GROUND’ probe, going to the level a little lower than the minimum desired level. This is the ‘common’ (or ‘...

Even the best car alarm is useless if you forget to set it upon leaving your car, whence this circuit. The relay has a make and a break contact: the  former is necessary to delay the switching in of the  alarm after you have got out of your car, and the  latter serves to switch on the car alarm proper. Immediately on re-entering your car, you must press the hidden switch, Si. This causes silicon-controlled rectifier Thi to conduct so that the relay is energized. At the same time, the green LED lights to indicate that the alarm is switched off.   Circuit diagram :   Best Automatic Car Alarm Circuit Diagram As soon as the ignition is switched off, T, is off, T2  is on, and the buzzer sounds. At the same time,  monostable IC1 is triggered, which causes T3 to  conduct and the red LED to light. The silicon- controlled rectifier is then off, and D4 is reverse  biased, but the relay remains energized via its make  contact for a short time...