38 Threads found on edaboard.com: Bat Circuit
This bat does not look like it will work. You may as well use one method where a fuel is burnt to make carbon dioxide. This attracts the bugs and they fiy into a high electric field that kills them.
I am reminded of a product marketed around 1925 and was guaranteed to kill bugs. It was two blocks of wood. You placed the bug on one of the b
Hobby Circuits and Small Projects Problems :: 20.07.2005 01:35 :: flatulent :: Replies: 5 :: Views: 2762
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: 1045
: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: 12579
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: 1599
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: 1395
latest versions of matlab/simulink have lithium-ion battery models.
Power Electronics :: 21.11.2009 17:13 :: Mr.Cool :: Replies: 4 :: Views: 3009
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: 7983
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: 2433
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: 1028
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: 2143
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: 1397
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: 983
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: 569
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: 314
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: 891
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: 575
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: 1213
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: 2400
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: 2267
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: 5903
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: 534
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: 1711
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: 1436
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: 1126
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: 818
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: 23924
Why you don't use a new DC/DC converter from 48 to 36 volts ?
Look for a schematics here, a square wave generator exiting a transistor ( saturated) with a 75% duty cycle, is not very stable bat for another DC/DC converter for lights is enough.
Electronic Elementary Questions :: 22.05.2009 21:36 :: brumi :: Replies: 5 :: Views: 2066
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: 1627
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: 532
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: 6172
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: 1249
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: 1673
yes sir goldsmith i've read what you have wrote,, i can only use 24v battery,,,,,
Hobby Circuits and Small Projects Problems :: 18.02.2012 06:15 :: useless018 :: Replies: 20 :: Views: 3492
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: 420
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: 648
Did inverter work ok before on a car 12~14.2V?
Check specific gravity which is an indication of capacity and ESR of each cell. High ESR can cause issues with some inverter designs causing instability during boost pulses.
I don't know if it needs a low ESR cap in parallel with battery to reduce VI transition losses from spurious switching, but d
Electronic Elementary Questions :: 28.08.2012 23:40 :: SunnySkyguy :: Replies: 12 :: Views: 804
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: 369
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: 601