| ??? 10/23/09 00:42 Modified: 10/23/09 00:48 Read: times |
#169983 - Prototyping Ideas Responding to: ???'s previous message |
Hi, with regards to prototyping small-pitch components, I have some ideas as I've prototyped TQFP 44/56/128, TSSOP, SSOP, SOIC, etc. many times including the SiLabs 8051 family, PICs, and others.
If you're on a budget, what I have found to work well is the low-cost TQFP adapters that are either TQFP-to-DIL or TQFP-to-.1" (4 rows, in a square shape) that run about $10 or so for a PAIR ($USD). I have purchased these on eBay, and some from Futurlec (long shipping times there). If you have the time... Also, I've used the Schmartboards for those and finer pitch ICs but they and other SMT adapters are otherwise heavily overpriced. One thing to remember is that if you use a separate SMT adapter (as opposed to soldering your IC directly onto the prototyping board) is that you can generally remove it later to use in another project, saving a lot of money & trouble. Then I normally use a tension-type (push-hole) protoboard or solder-type, depending on the permanence & durability needed. Unless you are working with high-speed signals, etc., or analog signals susceptible to noise I would not anticipate lead capacitance ever being a practical problem. I would be far more concerned with stable connections, pull-up resistors, etc... |
