Quote Originally Posted by Ross77 View Post
They sure do. should have to enougth to build 10 boards. £15 of that was for a logic probe.



Do you not need one on the output chip as well? How are the PMINMO boards? I nearly bought a couple the other day, but I really wanted something with the dual output chips to get 4amps, dont like running things at max power.......
Yes I do, i have a piece of 20mm finned ali 150mm x 100mm that three will be bolted to.. But for testing with the current set for 0.5A the L298 needs no heatsink, but the total draw on the 5v rail by the L297/L298 combo is 100mA so at 36v supply (26v into the 317) the 317 gets too hot to touch.. it actually verges on the temp limiter after a while and the 5v drops out. So a small heatsink is needed.

The boards are really excellent quality, recommended.

Incidentally the thing that looks like a clothes peg on the top LH corner of my base board in the second pic above is in fact.... a clothes peg... screwed down, with a length of 16awg wire (otherwise known as a cut down coat hanger) taped to the top and bent over at the end with a filed and flattened point. Its used for holding SMD devices against the board while they are soldered (Phil likes using SMD decoupling capacitors for on his boards)...