The board breaks out all of the pins; exactly what would be expected. The only issue that I had was that the JTAG port is close enough to the processor that it had some slight mechanical interference with the JTAG adapter. I took some sandpaper to the JTAG adapter's connector and now there is no interference.

Gregory | June 27, 2017

Easy to assemble and works well.

For ATtiny84 development board

I got both the ATtiny 84 and the ATtiny85 development boards. Both work well. They were easy to assemble. However, if your eyes are on the older side, then you may want to get the assembled version (if available). By their nature, you are soldering some small components.

After identifying the pins on the SPI connector and connecting a ISP device (USBASP or Arduino as ISP), one can easily burn a "boot" loader or application sketch. I found with the raw devices that one has to "burn" a boot loader to ensure the Arduino ISP timing functions work properly. The Arduino IDE "burns" a generic boot loader to the raw ATtiny84 (or 85). The Arduino IDE generic boot loader does not support programming by a serial or USB connection. But, it does work. With the generic boot loader, one needs to use a SPI connection. The raw devices have this SPI functionality built in.

The documentation does cover assembling the board. It needs to have diagram showing the SPI pin locations. This is not a major problem, if one has Volt Ohm meter to to determine the pins.

I am happy that I got these boards. They work well and come quickly in the mail

Guy | May 3, 2017

What you need

For Turntable Strobe

The item does what it should, and it's in a nice little package. Good stuff. Well worth the low price.

Horst | May 5, 2016

Good Product

For Turntable Strobe

Good product, does exactly what it is meant to do. However, shipping costs if you don't live in the States makes it expensive.

Howard | Feb. 25, 2015

Accuracy spec error

For Turntable Strobe

Stated accuracy in terms of percent and in terms of frequency deviation don't jibe.

Spec states accuracy of "0.005% or 0.03 Hz" but 0.005 percent of 60 Hz =0.003 Hz, and 0.03 Hz would mean an accuracy of 0.05%.
Which is it? And from what are you stating this accuracy? Is it from the spec of a quartz crystal you are using?

Response from Bot Thoughts LLC | March 2, 2015

Howard, thanks for pointing out my goof. The correct spec is 0.005% (0.003Hz at 60Hz).

I've updated the project description and documentation wiki to fix the goof and add detail on the accuracy spec.

After measuring every strobe I've produced so far with a Saleae Logic analyzer, all have measured within 0.005%.

The crystal specs at +-30ppm at 25C or +-0.003% which is 0.006% total. I confess I misread the spec as 30ppm absolute and so I have updated the description to use the cyrstal specs rather than my measurements.

Thanks again,
Michael

Tindie

Bot Thoughts LLC

Overall Rating:

Review Breakdown

Average Ratings

All Reviews

Decent Breakout Board

Easy to assemble and works well.

What you need

Good Product

Accuracy spec error

Response from Bot Thoughts LLC | March 2, 2015