If you need iron cores for your magnetics in electronic projects.
Try requesting few samples from Micrometals.
Browse the product lines and request samples using this form.
http://www.micrometals.com/samples_index.html
You will have to wait for shipment though as they send it via regular mail.
Sensirion will send 1 pc free sample for their SDP610 pressure sensor.
Click here.
http://www.sensirion.com/en/04_differential_pressure_sensors/06_freesampling/00_freesampling.htm
I recommend trying out Samtec's power cables and connectors .
The MPS series with its mating connector MPT series.
http://www.samtec.com/sudden_service/current_literature/power.pdf
You can request samples and Samtec will quickly deliver up to 5 units each.
Samples request form here.
http://www.samtec.com/sudden_service/samples_sql/sample_form.aspx
Remember:Samtec means sudden service.
Hittite Microwave Corporation provides samples for their line of standard
RF and Microwave ICs.
I just requested a 5Ghz attenuator and a sales guy confirmed they are on the way.
HMC541LP3
https://www.hittite.com/content/documents/data_sheet/hmc541lp3.pdf
You have to register here:
https://www.hittite.com/shop/register.php
And request samples here:
https://www.hittite.com/sample_request
There are a lot of forms to be filled up so be patient.
You may write "research" or "evaluation" in the applications section.
Hittite has a wide range of RF and Microwave ICs from VCOs, Amplifiers,
Filters ,etc. Although, they usually are in surface mount package , they come with
an evaluation PCB so it is easy for you to make connections.
They don't however sample the non standard parts, designers kits and assembly modules.
I just requested Zilog's classic Z80 microcontrollers .
http://www.samplecomponents.com/scripts/samplecenter.dll?zilog
If you need a basic 12 bit ADC you can request samples for
Maxim's MAX174 .
http://www.maxim-ic.com/quick_view2.cfm/qv_pk/1368/t/or
