I know this circuit will not operate properly unless the push button is debounced. My question is : What would be the best way to do this? Thanks.
View attachment 97573
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Debounce?
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Willem Programmer PCB50 repair
Hi all:
Just had the programmer crap out.... 5 Vcc vanished off the ZIF and the green LED indicator.
Caused a 'hardware or connector error' in software.
Traced it down to a cold solder joint on R20. This is located at the corner of the PCB near the Centronics connector.
It drove the enabling PNP switch (BC327 near J7 on my board) for the Vcc.
I attach a clone schematic and the driver s'ware which seems to be hard to find.
Just had the programmer crap out.... 5 Vcc vanished off the ZIF and the green LED indicator.
Caused a 'hardware or connector error' in software.
Traced it down to a cold solder joint on R20. This is located at the corner of the PCB near the Centronics connector.
It drove the enabling PNP switch (BC327 near J7 on my board) for the Vcc.
I attach a clone schematic and the driver s'ware which seems to be hard to find.
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LG TV -55LV5300-UA
Video just went black while playing, back lights work, audio works, remote works...volume etc. just ZERO video.
Youtube repair videos suggest the T-Con board is bad.
Can't find a replacement available AT all!
http://www.shopjimmy.com/lg/55lv5300-ua/
Has anyone any advice on troubleshooting the board at the component level?
tx
Youtube repair videos suggest the T-Con board is bad.
Can't find a replacement available AT all!
http://www.shopjimmy.com/lg/55lv5300-ua/
Has anyone any advice on troubleshooting the board at the component level?
tx
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Water level conductivity sensor in soda machines
Hello guys,
I'd like to understand how conductivity sensors work in general and hopefully as it applies to soda machines.
I've encountered two versions with different controllers but I'm sure the principal is the same.
Version 1:
Two stainless steel probes are inserted into the top of the tank (Carbonater) and both are isolated except about 2 centimeters at end of each probe inside the tank. The probes also have a connection on the...
Water level conductivity sensor in soda machines
I'd like to understand how conductivity sensors work in general and hopefully as it applies to soda machines.
I've encountered two versions with different controllers but I'm sure the principal is the same.
Version 1:
Two stainless steel probes are inserted into the top of the tank (Carbonater) and both are isolated except about 2 centimeters at end of each probe inside the tank. The probes also have a connection on the...
Water level conductivity sensor in soda machines
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How to make pcb design using easyeda
recently I have used easyeda to make schematic design and pcb design , I could use most of the libraries on the internet . Anyone who has used it ? Share your ecxperience . https://easyeda.com
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FOUND OUT SOMETHING
Yesterday i was doing an experiment and believe me it worked real good,
what i did:
1)took a graphite pencil and drew a deep line on a paper sometimes straight or curved
2)then took an open circuit of a LED and put the the two open terminals at both the ends of the pencil line
3)to my wonder the LED started glowing but dim
4)as i moved one terminal through the pencil line towards the other the glow became stronger
MY CONCLUSION:
1)pencil lines when drawn uniformly on a paper conduct...
FOUND OUT SOMETHING
what i did:
1)took a graphite pencil and drew a deep line on a paper sometimes straight or curved
2)then took an open circuit of a LED and put the the two open terminals at both the ends of the pencil line
3)to my wonder the LED started glowing but dim
4)as i moved one terminal through the pencil line towards the other the glow became stronger
MY CONCLUSION:
1)pencil lines when drawn uniformly on a paper conduct...
FOUND OUT SOMETHING
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wifi reception
what can i screw into my android phone to make its wifi reception a lot better?
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QUADROTOR HELP
Where from do i buy small but very powerful motors for my RC quadrotor online.someone please help me.![:confused:]( "Confused :confused:")
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completed my project
Completed my project of making an RC controlled 20MW gauss linear accelerator turret that can shoot down annoying drones and kites.Mounted it on my rooftop and has a webcam fixed to it for aiming with my computer from my room.Not to offend Derstrom8 the projectiles are made of iron core covered with latex rubber so that it is non lethal and just kills birds.Non lethal linear accelerators are permitted in our country.It also has self charging and reloading system.![:)]( "Smile :)")
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alloy needed
Does anyone know any alloy of titanium that can withstand temperatures from plasma as in this work no magnetic field containment can be used?![:banghead:]( "banghead :banghead:")
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Dissapointed from a LED light bulb...
Hi.
Bought this 30Watt
----> http://www.aliexpress.com/item/1Pcs...b201644_4_79_78_77_82_80_62,searchweb201560_8
with 102 leds, supposed to be for 85 to 265 VAC; gives less light than a 15Watt fluorescent CFL.
Supposed to have cree brand leds, but they do not tell the type/model in order to measure/test if the bulb is correctly built/labeled/driven.
Two equal...
Dissapointed from a LED light bulb...
Bought this 30Watt
----> http://www.aliexpress.com/item/1Pcs...b201644_4_79_78_77_82_80_62,searchweb201560_8
with 102 leds, supposed to be for 85 to 265 VAC; gives less light than a 15Watt fluorescent CFL.
Supposed to have cree brand leds, but they do not tell the type/model in order to measure/test if the bulb is correctly built/labeled/driven.
Two equal...
Dissapointed from a LED light bulb...
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Did I destroy this alternator?
Hey all.
I had a car that wasn't charging. So I chucked another 2nd hand alternator in it. It still wasn't charging and I was a little surprised but then I remembered that the battery light on the dash never illuminates. So I replaced the globe. The light came on with the ignition ok but when I started the car, it was charging at 18v. I checked the globe and I had fitted a 12 volt 5 watt globe to what had originally been a 12 volt 3 watt globe.
Even after fitting the correct globe,...
Did I destroy this alternator?
I had a car that wasn't charging. So I chucked another 2nd hand alternator in it. It still wasn't charging and I was a little surprised but then I remembered that the battery light on the dash never illuminates. So I replaced the globe. The light came on with the ignition ok but when I started the car, it was charging at 18v. I checked the globe and I had fitted a 12 volt 5 watt globe to what had originally been a 12 volt 3 watt globe.
Even after fitting the correct globe,...
Did I destroy this alternator?
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Maycom em27 CB Radio
I have a dead Maycom EM27, it dosnt switch on although the LED lights for the back lighting on it. It pulls around 6A when you turn it on so I am thinking its shorted somewhere, I am thinking the marked diode is a likely candidate for the problem. Anyone got any other ideas before i go screwdriver happy? I dont have access to a camera until Monday I will take some pics then.
View attachment 97604
The full schematic is too big to post but can be seen here...
Maycom em27 CB Radio
View attachment 97604
The full schematic is too big to post but can be seen here...
Maycom em27 CB Radio
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PIC to ESP12E wifi IoT module
Hi
Has anyone got any advice on using a PIC front end to gather data/multiple ADC samples and get this ESP 8266 -12E to format a web page for browsing?
How is the ESP8266 programmed or is it just AT commands to do it and these can be sent via PIC RX/TX?
How about I2c....or possible bitbang?
thx
Ancel
Has anyone got any advice on using a PIC front end to gather data/multiple ADC samples and get this ESP 8266 -12E to format a web page for browsing?
How is the ESP8266 programmed or is it just AT commands to do it and these can be sent via PIC RX/TX?
How about I2c....or possible bitbang?
thx
Ancel
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Remote Control 12v relay
Hello everyone,
I'm planning on adding some sort of remote control function that can push and pull the locking latch mechanism(it's like a deadbolt) on my garage door. I am thinking an actuator with a 12volt remote controlled relay. I've seen some of these type of 12volt remote control relays on ebay and amazon.
However the only thing I cannot figure out is how to auto stop the actuator from continuing once the latch has been fully pushed or pulled. I would like the relay to stop...
Remote Control 12v relay
I'm planning on adding some sort of remote control function that can push and pull the locking latch mechanism(it's like a deadbolt) on my garage door. I am thinking an actuator with a 12volt remote controlled relay. I've seen some of these type of 12volt remote control relays on ebay and amazon.
However the only thing I cannot figure out is how to auto stop the actuator from continuing once the latch has been fully pushed or pulled. I would like the relay to stop...
Remote Control 12v relay
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EMI filter design, values of cap and ind.
hi all,
I have to design EMI filter for a device, unfortunately ı am new at this issue. I decide to design CLC pi filter, but ı cant documents about this subject.
My problem is ı design smps having 132 kHz switching frequency and having about 10w power , it is successful electrically. Provides 2A 5V continuously, but fail EMI test. I use C-L filter but according to some document ı have to use C-L-C filter but this documents haven't got any info about this C-L-C values for any design....
EMI filter design, values of cap and ind.
I have to design EMI filter for a device, unfortunately ı am new at this issue. I decide to design CLC pi filter, but ı cant documents about this subject.
My problem is ı design smps having 132 kHz switching frequency and having about 10w power , it is successful electrically. Provides 2A 5V continuously, but fail EMI test. I use C-L filter but according to some document ı have to use C-L-C filter but this documents haven't got any info about this C-L-C values for any design....
EMI filter design, values of cap and ind.
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How to make 31 Wireless LED Indicator with Pushbutton
Hello guys. Can someone help me to build a project regarding this. I have three options: (a) Wired (b) Wireless (c) IC Programming
I assume the wireless is the best, I suppose if I use Wireless Doorbell, I can reduce the use of too much wiring. And to make it an LED indicator, I would just have to replace the buzzer/or chime of the doorbell into LED. Is it possible? But I presume, it could possibly have frequency interruptions because I will have 31 doorbells in 1 room. Is changing the dip...
How to make 31 Wireless LED Indicator with Pushbutton
I assume the wireless is the best, I suppose if I use Wireless Doorbell, I can reduce the use of too much wiring. And to make it an LED indicator, I would just have to replace the buzzer/or chime of the doorbell into LED. Is it possible? But I presume, it could possibly have frequency interruptions because I will have 31 doorbells in 1 room. Is changing the dip...
How to make 31 Wireless LED Indicator with Pushbutton
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COMPLEX SOUND CHIP 76477
yea I know this is an ancient chip but have always wanted to build something using one but chips are readily available but in an Sdip package unless I purchase 57 chips from a guy in Argentina!!
Well locating an Sdip socket is pretty much a wash unless I purchase for $12 one socket.
Before I go much further as I have an adapter PCboard designed and a PC board for a sound demonstration is there any interest in such a PC board.
My goal is a device I will call GRANDPAS REVENGE as this is a...
COMPLEX SOUND CHIP 76477
Well locating an Sdip socket is pretty much a wash unless I purchase for $12 one socket.
Before I go much further as I have an adapter PCboard designed and a PC board for a sound demonstration is there any interest in such a PC board.
My goal is a device I will call GRANDPAS REVENGE as this is a...
COMPLEX SOUND CHIP 76477
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lets have awards
Why don't we just have some awards program every year like say:
1) best moderator of the year
2)most helpful moderator of the year
3)return of the year
4)most knowledgeable guy of the year
5)funniest guy of the year and etc etc etc..............like this![:)]( "Smile :)")
1) best moderator of the year
2)most helpful moderator of the year
3)return of the year
4)most knowledgeable guy of the year
5)funniest guy of the year and etc etc etc..............like this
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Replacement for Transistor SL100
Can anyone suggest for replacement of Transistor SL100 for this kind of cuircuit? Please help me. I'm from Philippines.
I need your thoughts and favorable reply guys. Thank you.
I need your thoughts and favorable reply guys. Thank you.
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