.:madworm:.'s photos with the keyword: desoldering

The scope was behaving strangely, so I replaced the cpu. I removed the old one with ChipQuik and kept it for future projects. Maybe it is not entirely bad, but only can't handle being overclocked to 20MHz. I marked it with an X. Let's see if it did any good. Please note that a new hardware version of this device has been released, therefore these images will most likely not apply to it.

I accidentally killed these by applying 26.0V instead of 2.60V ;-( Instead of typing 026 on my power supply's keyboard I typed 260 and pressed the ON key immediately. The current limiter kicked in immediately (was set to 40mA), but that was too late already. It seems the regulation isn't as fast as expected. Nothing good can come from freak ideas after midnight.

Moving on to new adventures: SMD desoldering of big fat chips. Getting a hot air rework station is too expensive now, so I'll try this first. The first victim will be an ATmega64 sitting on my Jyetech oscilloscope DIY KIT. www.chipquik.com

The paste flux is really sticky and smells absolutely weird. Not like any flux I've smelled in 20 years. Use sparingly.

You don't need much of the alloy. It's also very brittle. Bending it like normal solder doesn't work. I just cut it to size.

You don't need much of the alloy. It's also very brittle. Bending it like normal solder doesn't work. I just cut it to size.