FS: 1*Adafruit MCP4725, 2*26MHZ OCXO, 1*Terasic DE0-Nano FPGA Board [MORE] - Page 1
Forum section: electronics / general

author: blueskull
author_rank: Unknown
timestamp: March 08, 2015, 06:28:13 am
content: Got some spare things for sale.1. Adafruit MCP4725 DAC module. This item is for FREE if you are the first one buying any my other items. Not for independently sale.2. 2*26MHz Vectron OCXO, equivalent to corning OCO700. SMT, 7 pins, 5V, AT cut. Price is 20 USD total.3. Terasic DE-0 Nano FPGA Board with EP4CE22 FPGA, C7 speed grade, with ADC, accelerometer and RAM. Price is 50 USD.4. TI LMX9838 bluetooth module. Price is 10 USD.5. 5*STM32F205RE WLCSP package. Price is 20 USD total.6. 5*LME49740, 6*OPA1612, 2*LME49722, 2*OP275. Price is 50 USD total.7. 5*CDCE62002 PLL. Price is 30 USD total.8. Microsoft Surface Pro Gen 1 with 128GB SSD, type cover, stylus and power brick. Price is400250 USD.9. Noppoo Choc 84 mini Cherry MX Brown keyboard with purple keycap set and original black keycap set. Price is8050 USD.All electronic components are brand new, protected well in ESD package.All assembled devices are used, in good shape.For item 8 and 9, you can PM me your offer.Ship from Raleigh, NC. PayPal or Wells Fargo bank transfer is accepted.//Added 2015-03-1010. Used Vicor half brick 24V->12V 200W module. $2011. New Delta 1/8 brick 48V->12V 240W module. $4012. New 20*2 character VFD, bad appearance. $5

author: miguelvp
author_rank: Super Contributor
timestamp: March 08, 2015, 06:36:27 am
content: I will take the Nano the OCXO and the bluetooth module for$70for all three and hope to get the DAC if I'm firstEdit: Ok, I'll go for the full $80 for all three2. 2*26MHz Vectron OCXO, equivalent to corning OCO700. SMT, 7 pins, 5V, AT cut. Price is 20 USD total.3. Terasic DE-0 Nano FPGA Board with EP4CE22 FPGA, C7 speed grade, with ADC, accelerometer and RAM. Price is 50 USD.4. TI LMX9838 bluetooth module. Price is 10 USD.I'll send a PM

author: miguelvp
author_rank: Super Contributor
timestamp: March 13, 2015, 01:38:21 am
content: Got it all today, thank you for the extra parts I do appreciate it.The one I don't know if I'm going to be able to play with is the LMZ10500, nice specs but that DC/DC switcher is tiny!Also thanks for the pair of opampsEverything looks like it's ok, but I'll fire up the DE-0 Nano over the weekend and report back.Thanks!

author: firehopper
author_rank: Frequent Contributor
timestamp: March 13, 2015, 11:53:25 am
content: Quote from: miguelvp on March 13, 2015, 01:38:21 amlucky! I've been looking for a de0-nano, and havent been able to find one for under 100$ usually they are going for $120 on ebay. I would have pounced on the one here if I had seen it soon enough.nice find

author: miguelvp
author_rank: Super Contributor
timestamp: March 16, 2015, 02:02:44 am
content: DE0-Nano works a treat, just tested it a little and no problems so far.The freebie you gave me (DAC) also works great:Here it's going from 0 to 4095 with 5V using the fast mode that you have to transfer sequential words (two byte transfers per value)It shows that it was transferring all 4096 values in 15.12ms, so at ~ 3.69140625 uS per value rate (~270,899.47 Hz)I did notice however that if I go from 0 to 5 back and forth it slows down quite a bit.Anyways, I figured I report back and give you a little bump for the rest of your things.

author: miguelvp
author_rank: Super Contributor
timestamp: March 25, 2015, 05:21:25 am
content: Played with one of the OCXOsPulled some pins from a breakable header and solder them to make the oven breadboard friendly.Applied power, didn't bother with the control voltage to adjust it just yet, but wanted to see how it would run by itself.The most accurate instrument I have is my scope, and it seems it's ballpark 26MHzThanks again and a little bump because of the great deal you offered.Edit: one more image with a wider expand and averaging on, and also to state that the power consumption after it warmed up was about 685 mW drawing 137 mA. Well within the <1W spec