Free PCB Build: Bus Pirate v3.5 SOIC

Topic: Free PCB Build: Bus Pirate v3.5 SOIC (Read 4130 times) previous topic - next topic

Free PCB Build: Bus Pirate v3.5 SOIC

September 14, 2011, 07:50:29 am

Hi there!

I'm got my free PCB today and I'm currently sourcing all of the parts required to assemble the Bus Pirate. These are the parts I've already sourced so far:
1x FT232RL (SSOP28) - Sourced from a Sparkfun XBee Explorer PCB with ripped tracks (a laptop fell on it)
1x PIC24FJ64GA002 - SOIC28
1x CONN_USB_MINI-B
1x 5V 150mAh LDO V-Reg - SOT-23-5
4x 1KOhm 0603 resistors
1x HEADER2X5-SHRD-PTH
1x HEADER_PRG_PIC_ICSP
2x 10uF Tantalem - SMC_A (Rated to 6.3v)
3x 1uF Ceramic - 0603
6x 0.1uF Ceramic - 0603

Parts still to get:
1x 4066 - TSSOP14
1x 700mA+ ferrite bead - 0805
8x 1.7v LEDs - 0805
2x 2KOhm 0603 resistors
2x 3.3V 150mAh LDO V-Reg - SOT-23-5
3x 10KOhm Resistor Networks - 0603 spacing

I was looking at using Mouser to get the last components but was a little shocked that shipping would be a minimum of $35 for less than $3 worth of components, so I'm now looking at using Element14 to get the components as I apparently can get free freight within Australia providing I order online and spend a minimum of $10. So I'm looking at alternative components for the Analogue switch (U3) and I'm looking at <Will place link when I can, part number from Texas Instruments CD74HC4066PW> as a direct replacement, but I'm not sure if this will cause a problem for the bus pirate.

I'll continue to update this thread as I progress though this build, but I hope it have it working within the next 4 weeks or so.

Thanks for reading
-Crenn

Re: Free PCB Build: Bus Pirate v3.5 SOIC

Reply #1 – September 18, 2011, 11:20:10 am

Best wishes for your build.

Re: Free PCB Build: Bus Pirate v3.5 SOIC

Reply #2 – September 22, 2011, 05:13:44 am

The HC substitution should be fine.

Re: Free PCB Build: Bus Pirate v3.5 SOIC

Reply #3 – September 27, 2011, 11:29:58 am

Hi,
I've also made a BP 3.5 SOIC version with free PCB code. And I tell you don't need exact parts.
1. 4066: Use any 4066 IC from any manufacturer.
2. 700ma ferrite bead: I've used a 1.0 Ohm 1206 resistor.
3. 1.7V LEDs: Get a wasted mobileset from any mobile shop. You'll find enough LED's below the keypad. I got one mobile board with 6 blue LEDs. Actually you need 4LEDs, other 4s are parallel.
4. 2KOhm 0603 resistors: I've used 2.2K ones. No problem.
5. 3.3V LDO @ SOT23-5: Use any LDO at same package. You can sample http://www.ti.com/product/reg102-33 from TI.
6. 10K resistor network: I used 8.2K ones (822 mark) from a dead ASUS motherboard.

EDIT: Can you upload a picture of partial completed board?

Re: Free PCB Build: Bus Pirate v3.5 SOIC

Reply #4 – September 27, 2011, 12:07:52 pm

Quote

And I tell you don't need exact parts.

That is key. That is one reason I don't like to give exact part numbers. There are tons of interchangable parts, and giving exact part numbers increases confusion for beginners: what values are important, how close does it have to be, etc. We try to give the important stuff (4066, 1uF/12V, 100R 0805) so you can use what is best for you.