2"x2" board for ATtiny85, with SMD and through-hole prototyping spaceDesigned by Azduino by Spence Konde in United States of America
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What is it? This is a project board for use with an ATtiny85 (or '13, '25 or '45) . This provides an outline for the ATtiny85 in either SOIC-8 or DIP-8. Each outline has its own 1206 bypass cap. It...Read More…
This is a project board for use with an ATtiny85 (or '13, '25 or '45) . This provides an outline for the ATtiny85 in either SOIC-8 or DIP-8. Each outline has its own 1206 bypass cap. It also provides holes for an ISP header, and pads for SOT-223 regulator and associated caps on the power supply (1206 or 1210), and a barrel jack. The rest of the board is dedicated to prototyping area, providing pads for an a variety of surface mount parts in addition to some traditional DIP prototyping space.
I have always found solderless breadboard to be the most effective tool for prototyping and one-off projects - however, they all suffered from two problems. First, most of the best parts now are in surface mount packages, difficult to use with through-hole proto-board. By effectively putting SMD breakout boards onto the project board, these parts can be used as easily as through-hole parts. Secondly, the quality of the available protoboard was just plain lousy. These boards are manufactured to the standards of real PCBs, with copper on both sides and plated through holes.
In the above picture, you can see an example of what a finished project using this project board might look like. Note that this is a prototype board - the ones shipping now are as shown in the main picture.
That board is connected to a 433mhz RF receiver (just off the side of the frame), LDR light sensor and a touch switch (the three-pin connector). One of the MOSFET channels is used to drive a pair of 10v 3W LED panels off the 12V input (using that large power resistor as ballast), controlled by the touch switch - this is used for under-shelf lighting. Meanwhile, an AOZ1282 buck converter generates 4.5v to power a red power LED (rated 5W, but run well below that); when a signal indicating that I've closed the door to my room is received over RF, and the room is dark, it turns on the red light so I can see my way back to bed.
A customer doing this on the old version tipped me off about this. He was cutting the power trace, and installing an ATtiny 412 (rotated 180 degrees so ground was the same pin. I made sure this would still work here, and it now gets "help" from the design. Power can be disconnected from the old trace by cutting the trace between the Vcc pin of TH outline, and the group of 2 pins it is connected to. Don't install the usual decoupling capacitor. To get power to the the pin marked 0 (which is the t412's power pin, solder a wire between the exposed Vcc patch on the underside and pin0 of the TH footprint, and connect the 0.1uF decoupling cap to the same pin; a ceramic SMD cap could be connected between the pin 0 through hole and the exposed grousquare ground patch (could use the gnd patch for the other side of a 0.1uF ceramic cap. The new (0/1/2-series) tinyAVR parts are whole other level, particularly the larger ones/
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Joshua | Nov. 16, 2018
Dennis | Jan. 24, 2016
Josh | Aug. 20, 2015
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