Mutchus

Introduction The LM317 is AN adjustable three terminal transformer that is capable of supply 1.2 to 37 volts with a secure 1.5A output current. The LM317 is prepackaged terribly} normal electronic transistor package that makes it very simple to mount in your circuits.    Schematic Overview The LM317 series of adjustable 3-terminal positive voltage regulators is capable of supply in more than 1.5A over a 1.2V to 37V output vary. they're exceptionally simple to use and need solely 2 external resistors to line the output voltage. Further, each line and cargo regulation square measure higher than normal mounted regulators. In addition to higher performance than mounted regulators, the LM317 series offers full overload protection out there solely in IC's. enclosed on the chip square measure current limit, thermal overload protection and safe space protection. The LM317 makes AN particularly easy adjustable change regulator, a programmable output regulator, or by connecting a set el...

Without any   USB to phone battery charger circuit we can charging phone battery using port on USB computer , but it will quickly damage the phone battery, and the battery will bulge. Because the voltage which was issued on usb is 5 volts , while the average-voltage phone battery 3.5 - 3.7 volts. That's why this USB to phone battery charger circuit is required , this USB to phone battery charger circuit reduce votlage to 3.7 volt usb, but will not reduce currents and  will make a durable phone battery . USB to phone battery charger circuit diagrams List of components : R1 : 1 K R2 : 330 R R3 : 4K7 R4 : 300 R R5 : 27R D1 : 4.7 volt zener /1W C1 : 100uF/16V Q1 : BC548 Q2 : BC558A LED1 : Green Led X1-1   : Vcc USB X1-4   : Ground USB X2-1 , X2-2 : To phone battery See also this printed circuit board ( PCB ) of USB to phone battery charger : USB to phone battery charger printed circuit board

This charger will quickly and easily charge most any lead acid battery. The charger delivers full current until the current drawn by the battery falls to 150 mA. At this time, a lower voltage is applied to finish off and keep from over charging. When the battery is fully charged, the circuit switches off and lights a LED, telling you that the cycle has finished. Circuit diagram Parts R1 500 Ohm 1/4 W Resistor R2 3K 1/4 W Resistor R3 1K 1/4 W Resistor R4 15 Ohm 1/4 W Resistor R5 230 Ohm 1/4 W Resistor R6 15K 1/4 W Resistor R7 0.2 Ohm 10 W Resistor C1 0.1uF 25V Ceramic Capacitor C2 1uF 25V Electrolytic Capacitor C31000pF 25V Ceramic Capacitor D1 1N457 Diode Q1 2N2905 PNP Transistor U1 LM350 Regulator U2 LM301A Op Amp S1Normally Open Push Button Switch MISC Wire, Board, Heatsink For U1, Case, Binding Posts or Alligator Clips For Output Notes 1. The circuit was meant to be powered by a power supply, which is why there is no transformer, rectifier, or filter capacitors on the schematic. The...

BRIGHT FLASH FROM FLAT BATTERY This circuit can flash a white LED, on a provide from 2v to 6v and turn out a really bright flash. The circuit takes regarding 2mA and recent cells are often used. the 2 100u electros in parallel produce a much better flash when the availability is 6v. 3v WHITE LED FLASHER This will flash a white LED, on 3v provide and turn out a really bright flash. The circuit produces a voltage on top of 5v if the LED isn't in circuit however the LED limits the voltage to its characteristic voltage of three.2v to 3.6v.   The circuit takes regarding 2mA an is really a voltage-doubler (voltage incrementer) arrangement. Note the 10k charges the 100u. It doesn't illuminate the LED because the 100u is charging and also the voltage across it's invariably less than 3v. When the 2 transistors conduct, the collector of the BC557 rises to rail voltage and pulls the 100u HIGH. The negative of the 100u effectively sits just under the positive rail and also the positive...

There are many ways of battery charging but constant-current charging, in particular,  is a popular method for lead-acid and Ni-Cd batteries. In this circuit, the battery  is charged with a constant current that is generally  one-tenth of the  battery capacity in ampere-hours. So for a 4.5Ah battery, constant charging current would be 450 mA. Circuit diagram : Constant Current Battery Charger Circuit Diagram This battery charger has the following features: It can charge 6V, 9V and 12V bat-teries. Batteries rated at other voltages can be charged by changing the values of zener diodes ZD1 and ZD2. Constant current can be set as per the battery capacity by using a potmeter and multimeter in series with the battery. Once the battery is fully charged,  it will attain certain voltage level (e.g. 13.5-14.2V in the case of a 12V battery),  give  indication and the charger will switch off automatically.You need not remove the battery from the circuit. If  the battery is discharged  b...

This circuit was designed to ‘baby-sit’ SLA (sealed lead-acid or ‘gel’) batteries using freely available solar power . SLA batteries suffer from relatively high internal energy loss which is not normally a problem until you go on holidays and disconnect them from their trickle current charger. In some cases, the absence of trickle charging current may cause SLA batteries to go completely flat within a few weeks. The circuit shown here is intended to prevent this from happening. Two 3-volt solar panels, each shunted by a diode to bypass them when no electricity is generated, power a MAX762 step-up voltage converter IC.  The ‘762 is the 15-volt-out version of the perhaps more familiar MAX761 (12 V out) and is used here to boost 6 V to 15 V.C1 and C2 are decoupling capacitors that suppress high and low frequency spurious components produced by the switch-mode regulator IC. Using Schottky diode D3, energy is stored in inductor L1 in the form of a magnetic field. When pin 7 of IC1 is o...

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.  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.  9V Automatic Battery NiCd Charger Circuit Diagram: 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 wo...

Basically the circuit designed above have a very simple way of working, where the circuit is designed so that does not happen short circuit or short circuit between the voltage supply with batteries that will be in-charge.  It is true that if any one wants to try to direct mengghubungkan between supply with batteries then the batteries can be sure will be filled. But the current flowing through a charged battery can not be controlled and if the battery is full, the batteries will be damaged or worn out if it remains on the short circuit condition. Working Principle Battery Charger By the time we put an empty battery charging terminals, transistor Q1 will be activated immediately because the current flows through R1 and would trigger a transistor Q1 base. In this condition the flow that would fill the batteries mostly comes from the collector of Q1 is connected directly to the positive terminal of supply. Then during the charging process increases the battery voltage will increase t...

The circuit described here can be used to  ensure  that  a  12 V  sealed  lead  acid  (SLA)  gel battery isn’t discharged too deeply. The  principal part of the circuit is a bistable relay,  which is driven by the output of an op amp.  Lead Acid Battery Protector Circuit Diagram The battery voltage is first reduced via D1, R1,  P1 and R2, and then continuously compared  with a reference voltage set up by diode D2.  When the battery discharges too much and  its terminal voltage drops below the level  set by P1, the output of the opamp becomes  High, which causes the relay to toggle. This  in turn isolates the load from the battery. The  battery can be reconnected via S1 once the  battery has been replaced or recharged.  The relay used in the prototype is a 5 V bistable type made by Omron (G6AK-234P-ST-US  5 VDC). The two windings of the relay each  have a resistance of...

The usual chargers of battery automotive, are simple and cheap appliances that charge continuously the battery, with a rythm of few amperes, for the time where the appliance is ON. If the holder do not close in time the charger, the battery will overcharge and her electrolytic faculty are lost with evaporation or likely exists destruction of her elements. The charger of circuit exceeds these faults. It checks electronic the situation of charge of battery and it has circuit of control with retroaction, that forces the battery charge with biggest rythm until charge completely.  Circuit diagram: Car Battery 12v Charger Circuit Diaram When charge completely, it turns on one RED led (LD2). The charger has been drawn in order to charge batteries of 12V, ONLY. What should watch it from what it manufactures the circuit, they are the cables that connect the transformer with the circuit and in the continuity the battery, should they are big cross-section, so that heat when it passes from ...

Lead Acid Battery Charger circuit is highly recommended to recharge battery. And recommended that maximum voltage 24V 7A battery, so you can recharge a battery simultaneously. Battery Charger has been little use of several components such as diodes, electrolytic capacitors , transistors , resistors, and also for strengthening of the voltage and current stresses. And also do not forget to lowering electric voltage 220V to 20V-35V 5-10 Ampere suitable for Lead Acid Battery Charger circuit.  List of components for the circuit Lead Acid battery : R1               = 1 Ω 2w R2               = 100 Ω R3               = 220 Ω R4               = 10K Ω Trim D1 - D5       = IN4004 Q1               = BC547 IC 1          ...