Can I use this programmer to program an onboard Atmega168 TQFP chip?
Does the board have to be powered up or the programmer supplies it's own +5v?
Here's what the programmer's schematic looks like.
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\$\begingroup\$ Don't know about the rest, but it seems that the board must be powered up; the programmer doesn't supply it's own 5V. \$\endgroup\$– m.AlinMay 19, 2012 at 8:40
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2 Answers
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You'll have to power the board. The +5V connection shown on the connector comes from your board and is used as a pull-up for the reset signal: the 10k\$\Omega\$ resistor keeps reset high until it is pulled to a low level by the transistor.
The latest PCs are often no longer supplied with an EIA-232 interface. In that case this programmer may be an alternative.
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\$\begingroup\$ The USBtinyISP is a great programmer. Found it more reliable than Atmel ones. \$\endgroup\$ May 20, 2012 at 10:56
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USBASP is the best programmer and is very fast as compared to Serial ISP Programmer. I recommend you to use this one. Specially for big size Flash Microcontrollers.
Here is the link of USBasp
