38 Threads found on edaboard.com: Bat Circuit
I want to build my own electric Mosquito bat which works on 2-3v cells.
anyone know about its circuits details?
Hobby Circuits and Small Projects Problems :: 20.07.2005 01:24 :: wylee :: Replies: 5 :: Views: 2685
this is a charger for bat.
and there is a feed back circuit.
Analog Circuit Design :: 21.02.2006 20:45 :: sunking :: Replies: 4 :: Views: 1002
:D How does Electric Mosquito Killer bat work, and send us the circuit as well as the part spec...:idea:
Hobby Circuits and Small Projects Problems :: 13.09.2007 10:06 :: dmmahesh :: Replies: 3 :: Views: 12453
Modify an electric fly bat! Kills fly, wont kill you! Try it for your self! Try to hurt yourself first before try to hurt somebody else!
Hobby Circuits and Small Projects Problems :: 21.01.2008 22:01 :: rikie_rizza :: Replies: 3 :: Views: 1576
You can use LTC4412 IC from linear tech. for ORing internal bat with external battery
if power consumption is important - if it is not important you can use 2 diode..
All the best
The microcontroller specialist
Microcontrollers :: 14.11.2009 12:16 :: bobcat1 :: Replies: 5 :: Views: 1384
latest versions of matlab/simulink have lithium-ion battery models.
Power Electronics :: 21.11.2009 17:13 :: Mr.Cool :: Replies: 4 :: Views: 2951
There are many reasons for that.
1. Low battery
2. faulty transformer
Post the circuit or photo
Electronic Elementary Questions :: 04.12.2009 21:11 :: nandhu015 :: Replies: 5 :: Views: 7832
This is my first post here…Thanks for allowing me to join your forum…
I have an idea for an electronic audio hobby project that I would like to build. It’s kind of a specialized device that doesn’t seem to be available commercially, so I would like to design and build it myself, just for fun, and I’
Hobby Circuits and Small Projects Problems :: 26.02.2010 01:24 :: sandiegojoe :: Replies: 5 :: Views: 2399
The absolute minimum voltage on any pin is -0.5V, so I think you should consider Schottky diode, like bat-85, configured as follows:
The cathode of the diode is connected to the pin; Its anode is connected to GND .. see attached picture ..
Microcontrollers :: 25.04.2010 02:36 :: IanP :: Replies: 9 :: Views: 1008
I have reded yet as newst Microchip information:
"Featuring a start-up voltage of 0.65 V and an operating voltage down to 0.35 V, the MCP1623/4 regulators reduce the number of batteries needed in a typical design--even enabling designs to be powered from a single Alkaline, NiMh, NiCd, or disposable Lithium battery cell."
Hobby Circuits and Small Projects Problems :: 25.05.2010 09:55 :: karesz :: Replies: 5 :: Views: 2114
I need circuit diagram for mobile battery charger, model no. JT-B50500
or JT-USB07, REV. 1.0
Service Manuals, Requests, Repair Tips :: 29.07.2010 13:33 :: abhay kulkarni :: Replies: 1 :: Views: 1372
In Lead acid battery charger circuit, i m using 10ah battery, load is 2 head light,now i am using charger ckt by LM317 now the battery life is so bad , it's life is only f0r 6 months, buut the battery we are using is same as usd in ups. . .but ups life is 3 years.. .. so rectify the problem. . .
Analog Circuit Design :: 21.07.2011 07:13 :: gane26 :: Replies: 4 :: Views: 949
From looking at the lower image, the red/black wires should be "bat" and "bat-", for "battery" and "battery, Negative terminal". I believe P23 corresponds to a pin or via near the IC in the center of the board (under the ball of black potting material). I'm not sure what voltages are present on your speaker/microphone (...)
Electronic Elementary Questions :: 30.12.2011 17:30 :: enjunear :: Replies: 6 :: Views: 528
It's difficult to see what's going on in your graphs as it looks like they don't all have the same vertical scale. I don't know about the oscillation, but I see a couple of other problems.
Firstly the caps are rated at 2.7V each, so for three in series the maximum safe voltage is 8.1V. Putting 12V across them seems to be asking for t
Analog Circuit Design :: 25.04.2012 22:28 :: godfreyl :: Replies: 3 :: Views: 289
You can open the PV source with a High Side switch instead of using the diodes.
Alternatively you can shunt it to a dummy load such as another battery or a water pump or 4 Cree LEDs that can handle the expected power at 14.5~14.6V.
Also , I think Solar cells have a characteristic impedance as leaky current sources. We know that maximum Power tra
Hobby Circuits and Small Projects Problems :: 18.06.2012 20:48 :: SunnySkyguy :: Replies: 1 :: Views: 861
hare is dis. circuit for 3.6v lion bat. modifi for your need.77074
Power Electronics :: 11.07.2012 07:39 :: tanveerriaz :: Replies: 3 :: Views: 529
I'm very new to this forum, so apologies if posted in wrong section.
I wanted a backup for my wifi router (12V * 1A = 12W) during power cuts , which is for two hours in my place Hyderabad, India.
So I searched the net and i found THIS[/URL
Electronic Elementary Questions :: 30.10.2012 10:39 :: iamsuperuser :: Replies: 11 :: Views: 1170
but there is an easy way and a not so easy way
the best way i found was to place all the bits in one folder
then compile the basic to asm and load the asm to proteus to
compile and run the circuit
you need to make your project folder inside the proteus folder
add the pa
PC Programming and Interfacing :: 02.01.2003 08:18 :: sick_man :: Replies: 2 :: Views: 2378
for a stream of data? no, not simple. for "On/OFF" or PWM signal, yes simple.
the reason is because data needs error correction, CRC sum checks etc. you must have a transmitter/receiver that his high noise rejection to retain good data. data must be 100% received or it is not at all.
if PWM signal, not so much a big deal. if you rece
Professional Hardware and Electronics Design :: 31.08.2003 21:35 :: Mr.Cool :: Replies: 1 :: Views: 2254
Help, I installed the design kit under ads(windows) , copy to the circuit\MasterModels folder of the design kit, excute errata_dos.bat and prefix_dos.bat , but when I simulate circuit ADS reports error as following:
Is my library version incorrect, or I have done wrong operation?
Could anybody help me?
Linux Software :: 29.10.2003 23:00 :: syncmaster :: Replies: 16 :: Views: 5843
A coil of 12Ω resistance is in parallel with a 20Ω resistance. This combination is connected in series with a third coil of 8Ω resistance. if the whole circuit is connected accross a battery having an emf of 30volts and internal resistance of 2Ω. Caculate a) the terminal voltage of the battery and b) the power in the (...)
Mathematics and Physics :: 30.09.2007 06:09 :: keni4eva :: Replies: 5 :: Views: 512
I have a 12V and 180Amp Led-Acid battery. Anyone have any idea to charge this battery without using Transformer based charger?.
I have a small chargeable light, in this light a Capacitor based charger (only a 100pf-220V Cap and a Bridge Rectifier) used to charge the small 9V battery. Is this (...)
Professional Hardware and Electronics Design :: 28.03.2008 14:08 :: kg300 :: Replies: 10 :: Views: 1691
What are you driving the gate of the mosfet with?
is the mosfet high side or low?
Without seeing the charging circuit etc its difficult to tell but id guess the current draw during charging is greater than when in UPS mode? (particularly if the battery is low)
You have to be carefull with the ON resistance and also the intrinsic diode
Professional Hardware and Electronics Design :: 03.07.2008 05:41 :: quinn :: Replies: 4 :: Views: 1421
My chip is burned down, it was burned after a long operation during tests. It's a 1A charger IC. I have tested several tens chips, but 2 were damaged. I saw Supply current is current limited by my setting(2A), Vbat current is ~30mA, and then chip was burned down.
1) Could you help me to figure out what're the causes in your experience?
Analog Circuit Design :: 24.10.2008 21:55 :: welton :: Replies: 4 :: Views: 1082
Enquiry: Re: help!some like oscillating.what's the it?
thanks.I have used spectrum analyzer ,and the I see in 980M and 1.8G there can be signal changing between -40--50dbm.I think if it's a oscillation ,it can be one power.not changing so much.what do you think
Your situation is clear. You have bat test setup and you are pickin
Analog Circuit Design :: 24.11.2008 10:48 :: Borber :: Replies: 18 :: Views: 806
Does anyone know how to troubleshoot Electronic Mosquito Racket ?
Because it can not generate the voltage to kill the mosquito anymore.
So, how can it generate such a high voltage? And, the Electronic Mosquito Racket requires only 3 dc volts (2 batteries of 1.5 dcV) to work.
On the other hand, I discovered one transformer which h
Service Manuals, Requests, Repair Tips :: 20.01.2009 01:58 :: alexan_sim :: Replies: 19 :: Views: 23217
Can anyone help?
I have an electric car, the lights and electronics are powerd from a dc/dc converter. The converter produces 12v from the main battery pack which is 36v. I want to run the car on 48v (for extra speed and range) but the dc/dc will not except this voltage.
How can I remove 12v before it gets to the dc/dc. I think a 12v zener diode
Electronic Elementary Questions :: 20.05.2009 14:00 :: Gareth Covell :: Replies: 5 :: Views: 2025
the problem is the soding great 4001 diode
you must use a schottky diode like a bat 85
not a silicon rectifier thats too slow
and will present slew to the slew ridden opamp
redesign around this
and post again
you can always add two in parallel to get the same current
most are 200ma bat85
Analog Circuit Design :: 10.02.2010 19:58 :: VSMVDD :: Replies: 18 :: Views: 1574
I think you need only a +/-5V supply for the Op= its done!
Added after 5 minutes:
These becouse DAC8831 has self an voltage output between 0V & Vref!
With the OpAmp as a buffer only you have it repeated/amplfied, bat if the OpAmp is connected into your circuit (with DACs onchip resistors); control
Analog Circuit Design :: 26.02.2010 05:11 :: karesz :: Replies: 1 :: Views: 516
Dear Jamil sb,
here we are purchasing complete pcb with programmed PIC16F72 ic.
This type of PCBA is consist of featured as,
1-complete switch over system with Relays etc, to maintain power failure and power restore.which is essential for UPS.
2-oscillator output to drive half bridge FETs.
3-cut off charging when battery reaches its max volts(
Business, Promotions, Advertising :: 21.08.2010 15:51 :: pnjbtr :: Replies: 6 :: Views: 6018
I am trying to interface a tc35i gsm module .
As datasheet I connected:
1-5 -> bat+
6-10 -> GND
18(RXD0) -> max232 (12-R1Out)
19(TXD0) -> max232 (11-T1IN)
and IGT to a circuit which trying to turn on the tc35i.
But I cant get anything hyper terminal.
When I set baud rate on hyper terminal to 115200 I and when I type I see something w
Professional Hardware and Electronics Design :: 06.02.2011 17:41 :: Sharagim :: Replies: 3 :: Views: 1222
There's a similar post out there about converting a battery powered baby swing to run off a dc power supply but since I'm not sure if it's cool to hijack someone's post I just started a new one.
Here's the link to what I'm trying to do: Russelldad's blog: Guest
Hobby Circuits and Small Projects Problems :: 21.12.2011 19:57 :: scott45 :: Replies: 3 :: Views: 1620
I would say that the chances of a very small 7.4AH battery being able to supply enough current at all are small at best. With 1kW load and say 80% efficiency the current drawn would be around 100 Amps which a battery of that size simply wouldn't supply, even for a short time. Even if it could, the expected life would be less than 5 minutes!
Hobby Circuits and Small Projects Problems :: 18.03.2012 05:01 :: betwixt :: Replies: 20 :: Views: 3382
as you know if create a Current source with transistor and put the capacitor as load it only charge until Vc=VEE,doesn't take more voltage.
i want to demonstrate the capacitor integral voltage the increase with Current
Yes, that happens because no current source (or anything else) is a perfect. You may build a "perfe
Electronic Elementary Questions :: 18.05.2012 14:05 :: etmabreu :: Replies: 15 :: Views: 397
I am looking to Convert a Pulse Train w/ both positive and negative pulses into a suitable form to be used by an FPGA board. I have to also keep track whether the pulse was positive or negative.
Any help appreciated!
If you could provide a diagram of what you are trying to capture, we migh
PLD, SPLD, GAL, CPLD, FPGA Design :: 03.08.2012 14:38 :: willis... :: Replies: 3 :: Views: 546
I built a little battery pack in a .50 cal machine gun ammo container. Its 3 6amp hour 12v batteries with a charge controller, a switch and a 30 amp fuse. I charge it with about 8 sq feet of solar panels.
It works fine for running things like motors or lights. (A small fan for example), however when I put a 12v to 110v inverter on it, it
Electronic Elementary Questions :: 28.08.2012 13:32 :: bignose :: Replies: 12 :: Views: 769
I am trying to understand an aspect of my measurement of a current pulse into a battery.
so the oscilloscope ground is at the battery -Ve terminal. The pulse is from a capacitor being dumped.
so the negative going Ch B which is the voltage across a resis
Power Electronics :: 14.09.2012 01:35 :: xaccto :: Replies: 5 :: Views: 353
Hello! I am searching for 3-pin Schottky diodes. Two diodes connected in series in one SOT package. Diodes i use recently worked okay, but mixer sensing is poor. I searched in internet for rf mixing diodes and found bat15 and some other diodes designed specially for rf mixer usage. But i cant buy them. So i am searching for such diodes in SOT packa
RF, Microwave, Antennas and Optics :: 06.11.2012 21:24 :: Terminator3 :: Replies: 7 :: Views: 537