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12 votes

Convert from VGA 9 pin to RCA (manually - old machine)

There are a number of problems you have here: VGA is 15 pins, not 9 RCA is composite video, not VGA IBM 5151 is neither of those, it's an old standard "MDA" (monochrome display adapter). ...
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5 votes
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Taking Quizbowl buzzers and connecting to a computer

Is there anyway that I can somehow connect this to my computer so that every time I click the button, it sends the signal of the enter key on my keyboard? Preferentially something that uses usb to ...
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5 votes
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How to switch composite video signal inputs to one output

Yes, it seems feasible. The bipolar transistors will not be a good solution. There are other ICs that could do this job, but this chip NJM2595 seems to be a very good and proper solution. About 10 ...
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5 votes

Need help identifying an integrated circuit

According to Sunergia, A23-837-1 cross references to RCA part #176226. Encompass identifies it as TA7630P, a DC controlled dual volume, balance, bass, treble audio IC. This matches your chip's package ...
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4 votes

Can PC RCA jacks be used for ADC?

The "DIY EEG" does not show using an RCA jack. The project uses 3.5mm plug (same as headphone plugs). Here is RCA plugs : . Here is what the DIY suggested : . Also, the DIY ...
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3 votes
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Standard Connector for Audio Line Out

Afaik, there is no 'default'. There are many more types: 5 pin DIN (very old, obsoleted by RCA); mono or stereo per connector RCA (2 different plugs for stereo), mostly obsoleted by 3.5 or 6.3mm ...
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3 votes

Can I connect TV internal Speakers to 3.5mm plug?

If you're trying to connect raw speakers to a computer, you can't do that. The speakers require a lot more power than what can come out of a computer. The computer can put out enough power for a pair ...
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3 votes

HDMI Switcher for analogue audio?

No, it isn't possible. An HDMI-to-RCA "cable" is really an active circuit that decodes the audio from the digital HDMI stream and converts it to analog. It takes advantage of the fact that the HDMI ...
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3 votes
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Objections to use an RCA connector for antenna in broadcast FM receiver

It will be fine. RCA connectors are found inside some TVs. I have this on 88-108 broadcast FM, and without doing measurements it is fine. Measurements weren't done because I didn't have access to ...
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3 votes
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Can PC RCA jacks be used for ADC?

Yes, PCs have analog sound inputs (often both microphone inputs and stereo line level inputs). Normally these are on 3.5mm jack connectors though occasionally RCA connectors are seen. be aware that ...
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2 votes

convert USB to RCA phone plug in order to close a switch

There are devices available such as this one (also available ready-built) that will do what you want. That might be bigger and more cumbersome than what you're looking for, however. In reply to ...
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  • 334
2 votes

RCA cable with plastic pin - what's its purpose?

As @Arsenal correctly noted, it used to be a metal-coated plastic pin, and the metal broke off. I just discovered that after dissecting the cable with a knife. I also discovered that such knife can ...
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2 votes
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connect headphones to TV RCA output?

That Wiki page sums it up pretty clearly. Except for the world crisis part, you mentioned. Why not use a commercially offered amplifier designed for the purpose? These days, there are fewer available ...
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2 votes

Turntable Output Grounds

It is safe to assume that for the audio signal, those two RCA shells are common. Where life can get interesting, especially with a mains-powered turntable and mains powered amplifier, is control of ...
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2 votes

Connecting a bare condenser microphone to a RCA cable

A microphone is a transducer, a device that converts variations in a physical quantity, such as pressure or brightness, into an electrical signal, or vice versa. You didn't give a link to a datasheet ...
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2 votes
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DIY BNC to F-connector or RCA?

Assuming it's a normal composite video CCTV camera (most are). You should be able to splice on a RCA connector and plug it into the composite input of your TV. Splicing on a F connector and plugging ...
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1 vote
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Can I connect TV internal Speakers to 3.5mm plug?

Yes, of course you can. But why involve any RCA connectors? Just get a 3.5 mm TRS (tip-ring-sleeve, 3 conductors) and wire it up directly. simulate this circuit – Schematic created using ...
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1 vote

Power transistor identification: old RCA

if more than one such transistor is used, then disconnect one that works and measure it. The BETA may have been selected to be higher, or for matching. The breakdown voltage may be been tested, and a ...
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1 vote

RCA shocking myste

With ungrounded plugs, that tends to be normal, and most likely the device manuals say you are supposed to unplug devices while performing connections so you should not be performing connections while ...
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1 vote

What should be the proper method to build a LINE-OUT signal from a Synthesizer that has only "Speaker" and "Headphones-out" outputs?

Figure 1. Voltage vs. time of sine waves at reference and line levels, with VRMS, VPK, and VPP marked for the +4 dBu line level. Source: Wikipedia Line level. The most common nominal level for ...
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1 vote

Fooling RCA cable into thinking it's connected

Composite video normally expects to be driven into a 75 ohm load. I would suggest soldering a 75 ohm resistor into the back of a RCA connector (plug or socket as appropriate). Shorting the output out ...
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1 vote

Fooling RCA cable into thinking it's connected

NOTE: This was a project to see how inexpensively I can hook up a dash cam. The camera itself was very inexpensive, and I did not mind damaging it in the search for the cheapest solution. Caveat ...
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  • 131
1 vote
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Is it normal for an RCA cable to carry a perceptible (to a person) current?

It is not normal, but is expected. I do not think there's something being failed, damaged or defective. These two devices are having different grounding designs. You PC, most probably, is having 3-...
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1 vote
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Reading a 0 - 1V Signal - Weird cable

Just chop the spades off and solder the wires to a 0.1" pin socket and plug it into ADC1 or ADC2 on the Gertboard. If you don't want to destroy the cable that came with the equipment then go down to ...
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  • 379k
1 vote

connect headphones to TV RCA output?

The TV probably uses an Op Amp to drive 1V line out so consider external Y to 3.5mm jack with 3.5mm plug from portable powered speakers and plug headphones into speaker jack.
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1 vote

How can I implement a SCART switch connector

Small signal relays might be your simplest and cleanest choice here. Reed relays might be an ideal selection. Selecting double-throw relays makes wiring the system easy - four relays in parallel ...
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1 vote

How can I implement a SCART switch connector

It would be CONN, SCART, Female, thru-hole PCB mount SCART 21 pin https://en.m.wikipedia.org/wiki/SCART However the square posts may damage if using a plugin proto plug, so solder short resistor ...
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1 vote

DIY BNC to F-connector or RCA?

As Peter has said if it is a standard definition analog camera then you can terminate to an RCA plug and connect to a composite input, typically yellow coloured. Just be aware there are some HD over ...
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  • 276
1 vote

Sending power to passive subwoofer via RCA connections

You need to see what size of wire was used for that subwoofer connection. If it is small-gauge audio cable, that pretty much rules it out for carrying any significant power levels. Generally ...
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1 vote

LCD display connection and power supply

The easiest thing would be to measure it while it's connected to the rest of the player. Use a multimeter to measure the supply voltage and current draw on the power connector.
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