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TCA785 obsolete, replacement?

I am looking to redesign an old circuit diagram's phase control IC. I can't find any ICs that can act as a replacement for this item: TCA785. What should I look for in an IC for phase control? It is ...
Wes Ellgass's user avatar
8 votes
6 answers
2k views

Best way to avoid vendor tie-in with DC/DC Converters

I frequently utilize DC/DC step-down converters in many of my projects. Mostly these converters have a low voltage input (Vin_max = 30Vdc) and low output current (Iout_max = 1-2A). There's a plethora ...
Jan Riha's user avatar
  • 137
1 vote
1 answer
258 views

Help find alternative AC capacitor replacement for refrigerator compressor [closed]

My mini fridge is broken and doesn't blow cold air. I'm suspecting it's the capacitor because it tested bad and I don't hear the compressor humming when turned on (all fan runs). I wanna try replacing ...
TacoTanium's user avatar
1 vote
2 answers
212 views

Understanding opamp amplifier (simple) behavior - Having trouble understand basic opamp operation

I'm trying to understand the operation of opamps, especially how to amplify a voltage as illustrated in the images from a (for example) photoelement so these can be used a the following comparator. ...
ulix's user avatar
  • 183
-3 votes
1 answer
96 views

Alternatives for batteries for energy storage [closed]

If it is not the indicated Stack App, let me know, please. I don't really know if this topic is about chemical stuff because of batteries composition or just a electronic energy problem. I've been ...
fontastico's user avatar
-1 votes
1 answer
132 views

FPT100B alternative [closed]

I have a board that uses an FPT100B and a 271 chip as fibre optic receiver. The fibre optic receives red light, not IR. The FPT100B is not working. I am pretty clueless as to what I can use as an ...
user3604932's user avatar
2 votes
2 answers
2k views

Measuring AC with a DC offset using a digital multi-meter

I got a bit confused about how AC voltmeters on digital multi-meters work. I don't want to know about for example sampling method or conversion of analog to digital data. I need to know whether it can ...
Mohammad Reza Hasanpour's user avatar
2 votes
2 answers
1k views

Safety Capacitors; Is it OK to fit an X1 in place of an X2?

I have a PCB which has a 0.010uF X2 safety capacitor fitted. It seems the exact part is now obsolete. Would it be acceptable to replace this part with a 0.010uF X1 safety capacitor? I believe a ...
313Ctron's user avatar
-1 votes
2 answers
153 views

Modern components to change old Soviet ones to make ion generator

I am trying to make the same scheme to get an ion generator. I found this one on the Internet and have difficulties finding the components in Europe as I cannot find their names in English. Can ...
Dea's user avatar
  • 1
0 votes
1 answer
170 views

560k 2% resistor alternative

I need a 560k 2% resistor which has 5 bands, I am not getting it online. The available resistors online are 560k 1W, 2W. Which one should I choose? Will one these resistors work as it should be ...
Amit G's user avatar
  • 3
0 votes
2 answers
79 views

Do I have to use EXACTLY the same power cable

I've purchased some surround sound speakers but the jack plug is L shaped and won't fit through my speaker stand. The power supply states it's a 18V 1.3a but I can't seem to find a power supply like ...
Dave Martin's user avatar
-1 votes
1 answer
1k views

RC4558 vs LM741

I want to use RC4558 as a low pass filter for a subwoofer. But, because of the lockdown situation, I am unable to get one. I only have LM741 in my package. How can an LM741 IC replace a RC4558? I read ...
Vishal's user avatar
  • 63
0 votes
1 answer
2k views

Alternative HLW8012 IC for 220v AC power meter in IOT power outlet

I would like to create a Power outlet IiT (220V 10A for home typical usages),so I am gathering the circuit which is needed on it. (all can see here) One part of it is Under-voltage protection, so I ...
user avatar
0 votes
1 answer
256 views

USB Type-C Alternative with fewer signal wires [closed]

I love the new, sleek look of the USB Type-C connectors, and would like to use a connector with similar features in an upcoming project. The trouble is, I only need two signal lines, one additional ...
Hackstaar's user avatar
  • 904
2 votes
0 answers
638 views

TLE2141 op-amp alternative (in DC load circuit)

I recently found a schematic for a DIY electronic load, which I think is based on Dave Jones's EEVBlog old DC load design (attaching the source link: Dynamic DC Power Load (updated), but I am ...
ilp's user avatar
  • 23
2 votes
3 answers
6k views

What can be alternatives to BF494 transistor?

I am currently working on a project which involves a RF Amplifier. I found BC494 to be quite suitable for the same. Though, I am looking for its alternatives since I couldn't get one of these.
Shivansh Rakesh's user avatar
-1 votes
1 answer
28 views

WiFi IC with minimal controller features [closed]

I do not want to program my esp8266. Are there any alternatives to it with lesser controlling abilities (I/O lines, Flash, etc)?
Pankajkumar's user avatar
1 vote
1 answer
284 views

How do we get the complex frequency of an exponentially damped sinusoidal function?

In my textbook, Engineering Circuit Analysis 8.Ed by William H. Hayt (Chapter 14, Section 14.1 page 536) I stumbled across a section explaining the complex frequency. The goal is to cover the concept ...
billyandriam's user avatar
1 vote
2 answers
301 views

Soldering alternatives for a relay [closed]

I have to confess that I'm not a handy person thus soldering is too difficult for me. I was researching on the internet about soldering alternatives but all of them are done for soldering 2 cables. I ...
Hola Soy Edu Feliz Navidad's user avatar
-1 votes
1 answer
201 views

An alternative to FF-260PA-3057 motor

I have a rechargeable electric shaver which stopped working after a few years of use. If I charge it, it works for a few seconds, then stops. I opened it and saw there is a short between the positive ...
nettek's user avatar
  • 1,055
0 votes
1 answer
820 views

Replacing a Boost Converter MOSFET

So recently I was experimenting with some 100W LED's (30-35 VDC @ 3A) and a "1200w" DC-DC boost converter that goes up to 85V. While at an input of ~12 VDC and an output of ~26 VDC, I accidentally ...
Bwinzey's user avatar
  • 87
0 votes
2 answers
778 views

What is the alternative for BYW98 diode? [closed]

We are using a driver circuit (L6203), however though, the diode in the device is broken, and we can not find the exact diode on the market. Would any body please, suggest an alternative diode for ...
Zohreh_Nsr's user avatar
2 votes
3 answers
3k views

X2 capacitor alternative component or circuit? [closed]

My computer monitor (Samsung Syncmaster 732N) started to fail and it seems some capacitors have gone bad. They are all electrolitic but one is a CARLI MPX40 .47K275V-X2 capacitor, which where I live (...
jotadepicas's user avatar
0 votes
1 answer
596 views

Are there any alternatives to ASIC chips? [closed]

Are there any other mixed-signal integrated circuit embedded systems (or alternative solutions) which are faster than ASIC in terms of performance (let say for a high-efficiency Bitcoin miner)?
kenorb's user avatar
  • 107
7 votes
2 answers
938 views

How to find replacement for a discontinued thermistor component? [closed]

I am in need of a thermistor with characteristics, such as those of now discontinued KTY84-130 (link to datasheet). I am after the exceptional linearity it features and also temperature range, up to ~ ...
James C's user avatar
  • 652
-1 votes
2 answers
1k views

Photoflash Capacitor Alternative [closed]

I have a very old (mid-60s) photographic flash system, and cannot find replacement capacitors. Specs: 525 uf, 450VDC I would assume I can find an alternative range of capacitor, but do not know how ...
Chatzi2015's user avatar
1 vote
1 answer
159 views

Relay Alternative

I wanted to see if I had any alternative to a relay for my project. I'm turning on a heating element that is powered from the wall: 120VAC (Max 30 Amps) Is their any alternative to a relay for this ...
gradedcatfood's user avatar
-4 votes
1 answer
278 views

How to start with replacing a hardware with FPGA/microcontroller? [closed]

I'm currently stuck with how to start with a project I took on. The project is that I emulate the results given by a program when connected to a hardware using the same program and a FPGA/...
Kapa's user avatar
  • 1
1 vote
1 answer
405 views

What are possible alternatives for a depletion PMOS

I need a fast reacting way of discharging a capacitor and I figure a simple depletion PMOS is what I need. The time at which the gate has to have a voltage to keep the depletion PMOS closed is not ...
Dehbop's user avatar
  • 279
0 votes
1 answer
2k views

Alternatives for a UDN2981A

I'm making the circuit depicted here. I already have the shift registers I require, but I can't find any UDN2981A ICs in the stores I have available to me. Unfortunately, I don't have time to wait ...
Alexander's user avatar
  • 270
1 vote
1 answer
930 views

Are there any alternatives to the 6522?

I want to build a legacy product (Mockingboard for the Apple IIe). I have built one on a breadboard using vintage parts. I ...
cbmeeks's user avatar
  • 1,208
0 votes
3 answers
441 views

How many alternatives does a 14-bit ADC have

I am a bit confused what alternatives are or how to find out how many are in an ADC. The book I have wasn't much help and I need to find this out for a project. Does anyone know the answer or how to ...
MB41's user avatar
  • 109
1 vote
1 answer
632 views

An alternative to microcontroller as a clock generator

I use ATTiny2313 microcontroller to drive a linear CCD imager. That's all it does - an infinite loop that toggles six IO ports at different times. However, it is only a 20MHz controller. I calculated ...
Nazar's user avatar
  • 3,192
1 vote
2 answers
987 views

Any more subtle alternatives for LEDs to indicate status?

Is there a low-cost, less annoying alternative to a buzzer or LED for displaying the status of an operation? I want my clock radio on at night, but it has this really annoying power indicator LED. I'd ...
Wyatt Ward's user avatar
0 votes
1 answer
2k views

Alternative for MC14543B

I'm following a tutorial that use a MC14543B chip. The chip is defined as "Bcd-to-7 Segment Latch/decoder/driver" Datasheet is here: http://www.digchip.com/datasheets/parts/datasheet/343/...
FMaz008's user avatar
  • 553
0 votes
1 answer
4k views

Alternatives to the PS223 power supply monitoring IC

I am repairing a power supply that (among other faults) has a dead PS223 chip. This chip monitors the output voltages for over/under voltage and over current. It also outputs a "power good" signal to ...
Pentium100's user avatar
  • 6,630