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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2answers
47 views

Adjustable power supply simulator/reality

Hi im a student of computer engineering and im currently doing a project of a adjustable power supply it should be doing 0-30V but im getting some problems with the word adjustable haha,i got this ...
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1answer
61 views

Advice on precision CNC milling machines for PCB prototyping

I am an EE professor at an University and I was asked to provide a solution (machine) for PCB prototyping. Specs are milling down to about 8 mil (0.2032 mm) trace thickness, 8 mil trace clearance, 8 ...
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2answers
92 views

Could someone identify this old prototyping board?

A friend of mine had this lying on a shelf- he had found it while cleaning out his basement. Any idea what it is meant to slot into, or its purpose in general?
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1answer
73 views

Electret microphone into iMac 3.5mm TRRS headphone jack amplification

I have this electret microphone: http://www.farnell.com/datasheets/1505849.pdf And I've put it onto a 3.5mm TRRS (4 pole) jack to go into the iMac headphone jack. For the iMac to recognise/accept the ...
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2answers
281 views

What is the official name for these jumper wires?

This may seem like a very trivial question, but sometimes the naming of things (nomenclature?) can be important when discussing technical things. What is the official name for the kind of prototyping ...
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3answers
80 views

Can I make a double board at smart prototyping pcb service?

They have a 5x5cm minimum board size. My board is approx. 35x20mm so I can easily put two side-by-side and thus double the board count within this limit. What is the best way to do this? I know how to ...
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2answers
85 views

photodiode amplifier

I am a mechanical engineering student and I am working on a research project where we want to use a reverse biased segmented photodiode (OSI SPOT2DMI series) to detect deflections from a high speed ...
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3answers
59 views

Best solution for compact wiring on stripboard

When transferring a circuit from breadboard to stripboard, I often struggle to manage the wiring; often it starts looking like an overgrown garden; the components inevitably start disappearing under ...
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3answers
426 views

Making prototypes with high speed SMD components

Even today we have breadboard and strip board on which one can make "quick and dirty" circuits and also test prototypes. However, we have now moved into an era of predominantly surface mount ...
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1answer
57 views

Circuitry for the DRV8840 Motor Driver

I'm building a circuit based on the DRV8840 (datasheet: http://www.ti.com/lit/ds/symlink/drv8840.pdf). Unfortunately, I can't get it to work. I think something might be wrong with my design. When I ...
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1answer
72 views

SMT reel: taking a couple of parts off the reel

I have a couple of SMT parts that I ordered "digireels" for - i.e., essentially tapes wound around a spool, with some leader tape attached at the front. This is good for the pick and place machine - ...
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1answer
66 views

Transmit 12v power wirelessly

Is it in any way feasible, in a small form, to power a 12v light with a power source or transition source 3" away without any physical connection? ...
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3answers
269 views

Only one LED is working on this traffic light circuit

I have a problem with my traffic light circuit. I've made sure of the wiring and everything seems right but for some reason only the yellow LED is lit constantly without it flashing and the other 2 ...
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0answers
98 views

Eagle PCB & cnc milling machine export format

I made a pretty PCB board in eagle cadsoft 7.2. I have a CNC milling machine i'm tring to export the vectorial file as HPG format then import the file to the cnc miling machine software. I only ...
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1answer
50 views

What is Stray Capacitance and how it can be Avoided

I have learned that especially in RF circuits stray capacitance can mess circuits up. I have learned that breadboards are a major culprit for this. However I do not know really what it is. What is ...
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2answers
222 views

How to solder IC to Perf Board

I just bought 5 boards from Allelectronics.com like this. I decided to make a circuit that involved ICs. When I attempted to solder the circuit onto the board I realized that once you solder the IC ...
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0answers
88 views

What to look for in a CNC PCB router?

When shopping for CNC routers for milling PCBs, there are some specific tools and others that seem to be fit but are meant for other types of works (typically engraving wood or advertisement). For ...
0
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2answers
118 views

How to break out SMD chips in-circuit?

For a current project I am attempting to amplify and cross-wire the signals from the address pins of SMD RAM chips. Basically this means I am trying to break out the pins of a SMD chip, similar to how ...
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0answers
62 views

Dupont-like connector with more than 3A current rating?

I really like 2.54mm Dupont connectors because they have single pin plugs and receptacles, they are universal, flexible and easy to use, especially for prototyping. Is there any similar connectors ...
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2answers
126 views

Where can I buy or how can I make high quality jumper cables?

The jumper cables in my possession are all so stiff and seem cheaply made. The connectors fall apart and its frustrating. The jumper cable is such a simple but critical component - how/where can I ...
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0answers
108 views

Choosing between veroboard type and Manhattan style constrcution

I am planning to make a digital circuit using a microcontroller and a TCXO operating at 10 MHz. I am trying to chose between a veroboard type construction (i.e. using a perfboard with individual ...
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2answers
89 views

How should I solder one board to another?

I have a small power regulator/charger and a IOIO-OTG that I'm trying to solder onto my protoboard. My current idea is to use male/male headers. Is there another way? What is the best practice when ...
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0answers
98 views

How do I go from a development board to a prototype?

Similar to How to go from a development board to a production board? For the past few months, I've been making a project which focuses around the TI Tiva C Launchpad series "EK-TM4C1294XL" ...
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2answers
458 views

Why would uart connection only work after disconnecting power?

I am using a Microchip Bluetooth Pictail and a Sparkfun 3.3V USB-to-UART and a Arduino Uno (just for power-5V,gnd and 1 active high signal connected to 3.3V). When I power the PicTail it outputs ...
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1answer
128 views

Is it possible to measure acceleration in sports activities with an accelerometer

I've been trying to make a simple prototype capable of measuring a punch or a shot put throw with an accelerometer, but suddenly stopped working, and "locked" into a value, has I was testing it. When ...
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2answers
133 views

Panel-mount Solderless Connection for Prototyping Station?

I built a convenient prototyping station with a bipolar and 5V power supply in an enclosure, exposing binding posts for the supply and with a solderless breadboard stuck on with the adhesive backing. ...
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0answers
115 views

PWM to proportional bipolar control with push-pull amplifier. Need input and opinions

I'm putting together a circuit to control a (small wattage) TEC device in a bipolar manner. The idea is to have a micro controller put out a 3V3 PWM signal, level shift it between +- 3 V and filter it ...
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1answer
58 views

Looking for robust reversible prototyping solutions

I've recently started making use of Arduino and Teensy microcontrollers to build various one-off pieces of equipment for my work in a neuroscience lab. Often I find that, after a device has worked ...
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1answer
340 views

Am I risking a short circuit/gaping situation?

I am rather new to the DIY/hobbyist electrical engineering scene. I am working with an arduino, a 9V power supply, and a few 7805 voltage regulators. I bought some sort of run of the mill PCB board ...
3
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1answer
284 views

What are the contact pads near the ATmega32 chip on the Arduino Yun?

What are/What use have these pads near the ATmega chip? I thought they are used for testing or something else, they seems to expose the ATmega traces directly. Maybe they can be useful to connect ...
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4answers
220 views

Large Wires on a Perfboard

I am working on a project on Perfboard which involves controlling a motor that draws about 10A, and I am using 18AWG stranded wire to connect the MOSFET on board to the battery and motor which are off ...
0
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0answers
320 views

Multiple Layers per Page Printed on Altium Designer

I use Altium Designer for PCB design. Usually, before ordering prototypes with a better finish, I make my own boards at home, as many do. I'm playing with the Press-n-Peel sheets for the tonner ...
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3answers
1k views

Manufacturing Microcontrollers for portable vaporizer by first prototyping with Arduino

This question I have mainly has to deal with approaching an electronics company with just a working Arduino Nano prototype. Say I want an electronics component manufactured which consists of an ...
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6answers
948 views

How to create an electronically controllable resistance to a physical movement?

What is the best way to create an electronically controllable resistance to a physical movement? For example, at the gym you control the resistance to movement by putting more load, more weight. Is ...
5
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1answer
844 views

How can I safely prototype a mains power circuit?

I'm building a device that has a mains power component, which I need to prototype before building to make sure everything works. I know I need to make sure wiring—and insulation!—is thick enough to ...
7
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3answers
726 views

Need help finding PCB components on DigiKey

I am looking at the TinyDuino Schmatics (PDF) and Eagle BRD/SCH from Tiny-Circuits (an open source project) to put together Bill Of Materials. I am interested in creating my own version of this ...
3
votes
3answers
172 views

How to connect 1.5mm SMT alternating pins to 0.1" pin header?

I have a toy I'm trying to rehabilitate - the microcontroller was fried and I'm attempting to replace it with an Arduino. It looks like the connections were at a SMT pin-pitch (1.5mm spacing). To ...
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3answers
893 views

How to make final good looking prototype of our project?

The handmade projects we make contain a lot of loose wiring and are actually bad looking products. So what should I do to make my product look better and that we can actually sell directly to people? ...
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2answers
162 views

Weird Behaviour with Bootstrapping Circuit

I'm trying to make a 3 phase BLDC driver and picked up some FAN7888s since they're inexpensive gate drives with all 3 phases on one chip. I read the relevant datasheets and application notes and ...
7
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2answers
1k views

Using copper clad for RF projects

As a novice reading "Build Your Own Transistor Radios" by Ronald Quan I was kind of mystified by the author's statement that using "vector" board would be easier than using prototype boards, but the ...
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1answer
505 views

L298N damaged? What to do?

I'm trying to control a DC motor with the L298N motor driver and it worked for a brief moment. I've used the setup mentioned in this video tutorial, but someone in the comments said that with this ...
2
votes
3answers
1k views

Designing for pick and place

I am thinking of using DesignSpark for PCB design and pass the files on for manufacture. If I want to miss out the soldering part and get the full boards made by a pick and place machine, can I use ...
4
votes
4answers
321 views

Electronics protyping and manufacture

I need to design and build an embedded piece of electronics based on a PIC microcontroller. I am assuming the process is: choose chip (PIC16F690) prototype code on PicKit breakout board prototype ...
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1answer
346 views

Prototyping for Bluetooth accelerometer

I'm a software developer looking to prototype an application that requires input from a 3-axis accelerometer, ideally via Bluetooth LE. Current specs on the accelerometer are +/-50G sensing range ...
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1answer
333 views

Circuit working in breadboard but not perfboard

I am making a circuit to unlock my car doors. The central locking in my car works with 2 wires one at 12V, the other at 0V. When the 12V line is pulled low, the door locks. When the 0V line is pulled ...
0
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1answer
298 views

How to make prototype circuits that include microcontrollers, and avoid breadboard annoyances at high frequencies?

From my searches of the web ( as well as this question ), I have found that breadboards - like the one on picture - aren't a good idea when your application involves high frequencies. I am going to ...
6
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4answers
2k views

Why do Integrated Circuits must be Baked (in the oven) before being used on a Prototype Board?

Why do Integrated circuits mostly QFN, need to be placed in the oven for an hour or so, prior to being used on a prototype board. Is it to somehow improve the protection of the ICs against ESD or just ...
2
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4answers
1k views

Finalize project: How to go from breadboard to a semi-permanent circuit

I'm tinkering with Raspberry Pi, and envision a few small applications that will require external circuits. I find the breadboard setup to be a bit too fragile for long-term use, but I'm not sure ...
2
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1answer
75 views

Identify which face of a cube is up

I have a device whose shape is a cube and I need to identify in real time which face is up. My current solution is (not yet implemented) is to use a gyro to get angular variation, but I can see 2 ...
0
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1answer
107 views

STM8L discovery board, wires for the breadboard

I don't know if it is the right place to ask, but still I have a STM8L discovery dev board - http://www.st.com/web/catalog/tools/FM116/SC959/SS1673/PF250636 which has very small square male-type ...