AVR-Chat

Don Ingram wrote:

> Kathy Quinlan wrote:
> 
>>OWEN-A wrote:
>>
>>
>>>Have you found a suitable oven for SMD work, I tried a toaster oven of a
>>>brand commonly available in AU and found that it was a little slow coming up
>>>to temp, and the temp distribution was poor (hot spots). There was a lot of
>>>heat loss "no insulation" the outside covers were nearly as hot as the
>>>inside of the oven and due to lack of time and the desperate need for a SMD
>>>oven lost interest for the time being.
>>>Have you been able to find an oven that looks like it would do the job?
>>>Owen.
>>
>>No idea, I bought a brevile one a few years back, I hope it will do the job lol.
>>
> 
> If you really want something in a hurry and you charge yourself for development 
> time then a COTS thermocouple adapter is also an option. This can provide 0-10V 
> or 4-20mA to feed into the Mega128 ADC. Total cost < 2 manhours, finished, 
> calibrated, accurate, no grief.
> 
> I used to use a Sunbeam toaster oven for a while, still available for ~AUD70. 
> Fold some alfoil around the walls & the lower 75% of the door. This makes an 
> incredible difference to the "cold sink" near the walls. Cook a few A4 sheets of 
> paper to see what the heat distribution is like. The unit had an external PID 
> controller with ramp/soak driving an Opto-SCR module which was built into the case.
> 
> There is a small Sunbeam unit with a fan as well now but I don't know how it 
> would suit the application.
> 
> The unit had 2 bars ea on the top & bottom & had no probs generating a good 
> reflow profile.
> 

Time is not a concern ;) Money is, Although I have 2 customers right now, one 
wants the 100 proto done in 2 weeks, and I will have a wait time of 5 days 
from the upfront payment to the delivery of the PCB's, so I have time. The 
Customer with the speed loggers, will place an order later this year. So there 
is no urgent time.

Hell it would not take me more than 30 seconds with the hot air tool to solder 
the first batch, only a 7555, 4 resistors and a cap :)




-- 
Regards,

Kat.
---------------------------------------------------------------
  K.A.Q. Electronics     Website: www.kaqelectronics.dyndns.org
  IM: Yahoo: PinkyDwaggy MSN: katinka@kaqelectronics.dyndns.org
  For Everything Electronics 		   Phone: 0419 923 731
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