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Found 8 results

  1. Is there a consensus on the best place to order PCB designs for smaller lots when doing BoosterPack prototyping? I've heard of www.seeedstudio.com/propagate , www.BatchPCB.com , and www.Oshpark.com so far. Are there other good ones? Best value between pricing, turnaround time, quality, etc? End goal would be some boards for personal projects and then a batch to sell on designer chosen outlets / leftovers to distribute to the community.
  2. I made a heart rate sensor, and prototyped it with the launchpad. The mcu reads BPM and displays it on an LCD. I now want to create a pcb without the launchpad. I've attached what I have so far. I'm powering everything from a 9V battery, so I have a 3.3V regulator which I will use to power the MSP430G2553. Can I just connect the the output of the regulator to the VCC pin, and connect all the other pins to the circuit as I did with the launchpad, or are there other considerations I need to account for? Also, how do I debug and edit the program while the microcontroller is on my custom pcb?
  3. Here are the files for my PCB Exposer/Printer, it is the complete package including mechanical design files. The printer itself. Example - a power control PCB for Raspberry Pi - 40 x 40 mm. Code includes driver for MCP4725 DAC, buffered serial port driver, stepper motor control and command parsing for the MSP430G2553 used as the main controller. Code and design files: PCB Exposer - controller code for MSP430G2553.zip PCB Exposer - desktop application.zip PCB Exposer - mechanical design files in Vectric format.zip PCB Exposer - schematics and PCBs.zip Desktop appl
  4. This is the first PCB that I have designed and sent off to be manufactured. Yesterday I received the boards, soldered them up, and they work! This write-up outlines the process I used in the hope that it will be useful to other hobbyists and builders. There are links at the end which provide additional detail. Selecting a Project The project consists of a small board with a MSP430G2553 microcontroller and an nRF24L01 radio. I started with a radio attached with jumpers to a LaunchPad quite some time back and then built one on a proto-board. The photograph below shows a G2553 with r
  5. I'm sure many of you keep an eye on the EEVBlog forum and may know already, but it looks like a free version of Altium is coming. http://www.eevblog.com/forum/altium/free-altium-is-coming/ http://circuitmaker.com/ tldr; The model is that you can rent extra features temporarily. The catch is that your board files are stored online only - no local saving. I've not used Altium but look forward to giving it a try if I have time.
  6. Are there any good autorouting programs out there for a custom PCB? It seems like this would be a relatively easy thing to implement, just a bit of linear algebra or basic calculus or optimization. the eagle software only computes half of the autorouting, and it usually takes longer to find and redo all the mistakes it makes.
  7. I've spent a lot of today experimenting with PCB etching as it's not something I've done before. To be honest the day has been pretty much a waste of time. I've CNC milled PCBs in the past without a problem but etching has been winding me up. I'm using pre-sensitised UV resist board and I've had some success. It turns out that sticking the board on top of my van under some fluorescents works better than UV exposure though. However, it's the etching that killing me. I tried a Ferric Chloride and sponge technique and it hardly etched at all. I tried some Sodium Persulfate that came with
  8. So those PCBs I got made? I got antsy, and took a hit. The main chip I wanted on is the LM4970 from Texas Instruments/National, which comes in a LLP (Leadless Leadframe Package), no external legs and not even a small bit of it on the edges. I tried this dead bug style before, but the first time was a disaster, and the second time worked, but the wires for the Mid/Red led flaked off (not a bad thing actually) and the i2c lines as well (Definitely not a good thing). I could try again, with some 34awg wires, but no. Don't have a reflow oven, or toaster over I could hack (or the relays or anyt
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