ChrixXenon wrote:Thanks again. This is a whole new world for me. No breadboard-friendly options then?
You can get breakout PCBs for SOT23 & SOT223 for a few dollars.
ChrixXenon wrote:Oh and the other problem I saw: the cost of postage is like £12 for a £3 device. Is there a way around that - or a seller that doesn't do that?
There are several listings on aliexpress for 3-10 chips with free shipping.
alonewolfx2 wrote:ArnieO wrote:If you're not very pressed on time or project volume, you get 20 of these for 10.8$, free shipment (54 cents each!);
http://www.aliexpress.com/item/20-pcs-Ultra-Small-Size-DC-DC-Step-Down-Power-Supply-Module-3A-Adjustable-Step-Down/32262311443.html
It only converts down, but that what I mostly need.
i wonder one thing. what is idle current of module?(quiscent current)
Most of these modules seem to use the MP2307.
According to the datasheet the quiescent current is 1.3-1.5mA, which is not really great. Also the minimum input voltage is 4.75V, which makes it unsuitable for single cell Li-Po/Li-Ion or anything less than 5x AA batteries.