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Questions tagged [prototyping]

The process of making the first working sample of a circuit, that may be on a temporary base like a breadboard

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29 views

Designing a prototype pcb in Eagle with other parts imported?

I am protyping a project with several boards like microcontroller, charger, booster etc. for my bachelor's degree in electrical engineering. Now I want to switch from my prototype board and etch my ...
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3answers
101 views

How to correctly use a set of pogo pins?

Following the excellent recommendation to a previous question of mine (on what to use when I want to connect to a board without soldering), I got hold of pogo pins. How to use them correctly, when in ...
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1answer
45 views

Low Pass filter

I am making a Sallen-Key topology second order low pass filter with 10Hx cutoff frequency: I am using the LM248 op amp. The resistor and capacitor values are specified in the drawing. However, when I ...
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1answer
41 views

Help needed for HV DC/DC converter

I need to design a boost converter that outputs ~20 mA DC and an unloaded voltage of around 68-100 V. The inverter will be part of a Zener diode analyzer. I built it on the idea of the Joule thief (...
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3answers
141 views

Building AC to DC circuit that can not be run on a breadboard

First I have an AC power source. Can I solder the power source directly to a rectifier to make it DC? I plan on using a protoboard using the DC power but I need the board to be able to handle 2Amps ...
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4answers
89 views

Attaching wires to a SMT footprint

I have a pre-made motor controller which I want to re-purpose for a hobby project by pulling the MCU off and attaching to a custom control circuit (with a more powerful MCU, current sensors, etc). The ...
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0answers
61 views

Flashing an LED with Schmitt trigger

I'm trying to build the above circuit, which is supposed to flash an LED with a schmitt trigger (with the possibility to vary the frequency with the knob of the 47kOhm potentiometer). I don't have a ...
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1answer
81 views

5 to 12 V boost converter not boosting

For my power electronics course, I need to design a basic boost converter that is converting 5 V to 12 V with 0.5 A output current. Below you can see the simulation results. MOSFET is driven by 20 kHz ...
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1answer
89 views

I have an idea/invention and look for a real investor/industry to take it to the next level? [closed]

I checked many online resources/websites and all of them asked me to pay thousands of dollars to make it real! I couldn't find any one that says you don't have to pay and we will take it from here ...
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2answers
2k views

What is a mask on a PCB?

I have an Arduino project that is mostly working on a solderless breadboard and I’m starting to plan on making it semi-permanent by soldering the components in place and mounting it into a project box....
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1answer
78 views

ILI9341 Library for arduino

I'm writing an arduino library for ILI9341 tft display. I tried to write on the display but nothing appears. Why? How can I solve the problem ? My source code: ...
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2answers
62 views

Can problems arise from mixing 2.5mm pin pitch components with 2.54mm through-hole protoboards?

I am new to electronics and from what I understand, most protoboards seem to be standardized on a 2.54mm (0.1") pin pitch. I am also aware that there are through-hole components which are manufactured ...
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4answers
2k views

Using decapped ICs in production

We were looking for a very specific type of ADC in a small package for one of our projects, and found something suitable in a TSSOP. We wanted to save more space, so looked into getting bare dies; the ...
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2answers
171 views

Questions about prototyping a DMX Splitter

Original schematics I want to make the following DMX Splitter: Credits by J. Mack, see Full article: DMX Splitter Changes Changes made by me (with help of Maple, Transistor and many others, thanks ...
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2answers
115 views

How to stack protoboards solidly?

I have an enclosure and want to add some protoboards inside it. I can place two next to each other, but since I'm a bit out of space I think it's best to stack 3 of them with PCB spacers. However, I ...
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2answers
168 views

Matrix board without solder pads

I am sure there is an obvious answer to this question, so I apologise in advance. I ordered some matrix board, but what arrived has no solder pads. Every matrix board I have used has the solder pads, ...
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0answers
31 views

Techniques for probing circuits that would normaly be covered by a heatsink

I have a circuit board I have to probe and measure to first debug and then later on verify performance. The circuit board contains a power amplifier that requires a heatsink in order to keep the ...
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1answer
823 views

Verowire woes - how to reliably solder it?

I'm using Verowire (wiring pencil, Road Runner, you name it) quite often to contact test points on my board to make them accessible for measurements (oscilloscope probe, multimeter clamp ...) Image ...
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2answers
80 views

For the first prototype, how many pieces are necessary? Includes 256BGA, SMA, SDRAM

I'll most likely need to re-run. For the first batch of prototype, what is the safest number? Ordered 10pcs of PCBs and ordered 10x components.
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2answers
162 views

Jumper wire solution for short header pins /

I installed header pins that fit into a feather microcontroller, but since they are not double sided header pins, the top side is too short to attach normal jumper wires to. Is there some clean, non-...
2
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3answers
514 views

Easy connectable/click system between enclosures

I'm planning to make some devices which I want to easily connect together. Normally cables are used, but I wonder if there exists something like a 'clicable' connector, where the output of one ...
13
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6answers
2k views

How to fix a 'PCB' without mounting holes inside a case (or on a PCB)?

I want to use several of the 'filled PCBs' below, or other ones, but the question does not change. How can I fix such thing in a case, or on a proto/veroboard PCB (like the picture below)? I ...
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3answers
514 views

What edge connector for prototype board?

For personal hobby projects I'm using prototype boards like this (2.54 mm pitch): I connect them using wires, which is a mess. I want to use a backplane with female edge connectors, for a solution ...
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3answers
1k views

Arduino: How does one extend the pins to accommodate multiple sensors?

This is a fundamental question about the Arduino system. I've been trying to find answers all day, but keep getting answers either unrelated to the Arduino or completely off topic. I'm building a ...
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2answers
122 views

Does the order of connecting the low pass and high pass filter make any difference?

Is there any advantage in connecting up high pass filter first and then low pass filter to achieve a simple band pass filter. Or the other way around is better? Will there be any change based on the ...
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0answers
76 views

Am I soldering this IR sensor/emitter array properly?

So I'm following this book called Arduino Robotics (ISBN: 143023184X). I am very new to electronics in general and I'm not sure if I'm doing this right. Below is a video showing the way I soldered it ...
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1answer
97 views

Inconsistent Gain with Instrumentation Amplifier

I'm trying to prototype an instrumentation amplifier with OPA2111 as the first stage and INA105 as the second stage on a breadboard. The circuit diagram is similar to this: Power rails are connected ...
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3answers
105 views

What are my prototyping options when working with smt devices?

I have been working on a project which will allow me to learn how to charge Li-ion batteries. I recently purchased some simple PMIC's made by Texas Instruments. I received them the other day and ...
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2answers
247 views

Simplest way to measure 4 cell LiPo battery State-of-Charge during discharging

For testing purposes, I need to know an aproximate percentage of the battery charge in order to know when the battery must be recharged. It doesn't need to be accurate at all, p.e. a simple signal (...
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1answer
115 views

Mass producing my electronics/raspberry-pi idea - What are the steps? [closed]

Could somebody tell me what the rough steps would look like? I think I have a good idea. I have put things into practice, and it's working and so on, but it's very ugly. I guess, first I would have ...
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2answers
47 views

GSM Relay which of these pins is which? [closed]

When the relay (the blue deely) is activated, an LED should light up. A one contact from the battery and the correct contact from the LED must be connected to each other. What should the remaining ...
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1answer
52 views

Mounting SIP Power Module with 1.7mm Pin Pitch @ 8 Amps

I'm attempting to mount a GE NQR010A0X4Z power module (datasheet here) on a prototype board or custom PCB and am not sure what I can do besides directly soldering wires to the pins (which seems very ...
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2answers
310 views

How can I go about making temporary test connections in pcb while prototyping without soldering?

I recently ordered some PCB bits from Adafruit to assemble a widget. I want to make temporary connections between different PCBs, but am not convinced I want to solder and then desolder and resolder ...
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1answer
66 views

Beginning bread boarding question

Is the diagonal 10k too close? Am I good?
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1answer
245 views

BGA prototyping practices

I'm working with a few BGA chips of a very fine pitch 0.5mm even smaller sometimes. What is the practices for being able to essentially breakout all the connections from these chips? I've just been ...
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1answer
114 views

Testing a 32-bit (or any “square” shaped) microcontroller

I know there are certain shaped microcontrollers that can fit onto a breadboard without using an actual PCB, like the Arduino. One can use normal jumper wires and utilize the breadboard to their own ...
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0answers
198 views

Drive 6-wire 2 center-tap stepper with Stepper Driver

I've come across a stepper with the operation logic shown in the snippet below. I've read elsewhere that I can operate the stepper using an EasyDriver or BigEasyDriver by simply ignoring the center ...
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4answers
2k views

What is a good alternative for the UA741 opamp in hobby projects?

Related to What's the uA741's appeal?, a lot of schematics use this rather dated opamp. My follow-up question would be: What is a good alternative? Of course if you have specific requirements ...
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2answers
361 views

Build a voltage-controlled voltage source out of discrete components

I'm in a bit of a pickle. I need to build a voltage-controlled voltage source, but I don't have any opamps (or time to order them). I have been working for several hours trying to simulate a circuit ...
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2answers
142 views

Prototyping a MC68020

What techniques are there to "prototype" a component like a MC68020 processor? Since the pins are in a 13x13 geometry standard bread boards will not do. Are there something like bread boards for this ...
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2answers
182 views

Inconsistent behavior from circuit on breadboard

Recently I started building circuits on bread boards. Nothing advanced, mostly stuff like full adders, ripple counter, etc. I am noticing some interesting behavior from the circuit though. I'll get ...
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1answer
89 views

Solution for solenoid valve with can give flow without power? or any other alternative way of it?

I want to use a Solenoid valve for my project, the valve will be used for water in which is facing one problem if there is no power, how can we get water from the valve, I don't want to add any kind ...
2
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1answer
132 views

Does fast one-day prototype manufacturing exist (with components, etching and pick and place under one roof)? What is the fastest possible? [closed]

We have different prototyping assembly houses, but cycle times are so long that engineers need to work on 2-5 projects in parallel. The typical prototype assembly process is: one day order process, ...
3
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3answers
506 views

RTC chip not happy with xtal waveform

Update: This question is based on a wrong assumption, the problem has now been fixed. The problem was an incorrect register setting in the RTC. However the answers given regarding load capacitance ...
1
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2answers
152 views

A more elegant solution to wiring this system?

I have a pressure system with eight solenoid valves on it and I'm controlling it from an Arduino. For each valve I have a solid state relay that an Arduino controls to switch on and off 12V from the ...
2
votes
1answer
1k views

Wiring and soldering a prototype board

I have a working prototype project using a Raspberry Pi Zero, Pi Cobbler, and a breadboard that I would like to make a little bit more permanent by wiring and soldering a prototype (perfboard) board. ...
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2answers
765 views

Solid State Relay Either Stuck on or not Running

So I've wired up a relatively simple circuit where an Arduino controls a solid state relay that is connected to a 12V 30A power supply which runs a solenoid valve. I'm using the an Arduino Mega 2560 a ...
1
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1answer
232 views

EAGLE: Add a GND bus and a VCC bus to a proto board

I am quite new in the Eagle world and I need help. I have made a bunch of simple prototyping PCBs of different sizes as part of a custom library and now I want to add a GND bus and a VCC bus (like in ...
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1answer
135 views

Using 3-Axis Digital Accelerometer to Measure Rotational Acceleration in a Helmet?

I'm very new to using sensor components and I have a 3-axis digital accelerometer I can use, but I don't know if I can use one to measure rotational acceleration in a football helmet? Is the sensor ...
1
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2answers
261 views

Frequency limitations of analog prototyping [duplicate]

At what frequency do breadboards become a bad idea for analog prototyping? I am considering using vector boards and soldering parts directly to the circuit board. Thanks