This is the tougher cousin to the 1.3A (1.2MHz switching) version. Whilst the voltage adjustment pot seems to be of reasonable quality compared to the crap ones used on the "Geekcreit® Mini DC-DC Converter Step Down Module" (and its clones), unless you need an in between oddball voltage setting (6 or 7.5 volts for example) and have the patience to finesse it onto the required voltage setting - it's very touchy, you'd be better off cutting the trace (at its necked point) which bridges the Adj option solder blob link (you can still blob this link if you need to restore the Adj option) and solder blob the required standard voltage option link. Cutting the Adj option bridging link so you can choose a fixed voltage setting is a safer option - no risk of the trimpot falling apart or going open circuit to over-volt whatever 3.3 or 5 volt rail you're powering with just one volt short of whatever the input supply voltage happens to be (12 to 24 volts perhaps?). Testing the fixed 5v option gave me a tad less than 5 volt (4.95 something volts). Ideally, I wanted a voltage between 5.2 and 5.3 volts so tried blobbing both the 9 and 12 volt option bridges instead which gave me 5.31 volts - right on the money as far as I was concerned. :-) These "3A" versions run a lot cooler compared to the "1.3A" version when testing with a one amp load so should be more robust than their 'weaker cousins' whose overheating/overloading protection seems somewhat lacking since I manage to make a 1.3A one start emitting its magic smoke due to a 5v CMOS RRO dual opamp shorting out the 5v supply rail in a Mark II version of a DIY GPSDO I had been testing (most likely a design error on my part, now since remedied). The specs mention 20mV of ripple noise which will be the RMS value. The peak to peak value will be approximately three times this value, circa 60mV p2p which is quite good and easily reduced to less than 10mV p2p with additional filtering if needed. JBG

This is the tougher cousin to the 1.3A (1.2MHz switching) version. Whilst the voltage adjustment pot seems to be of reasonable quality compared to the crap ones used on the "Geekcreit® Mini DC-DC Converter Step Down Module" (and its clones), unless you need an in between oddball voltage setting (6 or 7.5 volts for example) and have the patience to finesse it onto the required voltage setting - it's very touchy, you'd be better off cutting the trace (at its necked point) which bridges the Adj option solder blob link (you can still blob this link if you need to restore the Adj option) and solder blob the required standard voltage option link. Cutting the Adj option bridging link so you can choose a fixed voltage setting is a safer option - no risk of the trimpot falling apart or going open circuit to over-volt whatever 3.3 or 5 volt rail you're powering with just one volt short of whatever the input supply voltage happens to be (12 to 24 volts perhaps?). Testing the fixed 5v option gave me a tad less than 5 volt (4.95 something volts). Ideally, I wanted a voltage between 5.2 and 5.3 volts so tried blobbing both the 9 and 12 volt option bridges instead which gave me 5.31 volts - right on the money as far as I was concerned. :-) These "3A" versions run a lot cooler compared to the "1.3A" version when testing with a one amp load so should be more robust than their 'weaker cousins' whose overheating/overloading protection seems somewhat lacking since I manage to make a 1.3A one start emitting its magic smoke due to a 5v CMOS RRO dual opamp shorting out the 5v supply rail in a Mark II version of a DIY GPSDO I had been testing (most likely a design error on my part, now since remedied). The specs mention 20mV of ripple noise which will be the RMS value. The peak to peak value will be approximately three times this value, circa 60mV p2p which is quite good and easily reduced to less than 10mV p2p with additional filtering if needed. JBG

This is the tougher cousin to the 1.3A (1.2MHz switching) version. Whilst the voltage adjustment pot seems to be of reasonable quality compared to the crap ones used on the "Geekcreit® Mini DC-DC Converter Step Down Module" (and its clones), unless you need an in between oddball voltage setting (6 or 7.5 volts for example) and have the patience to finesse it onto the required voltage setting - it's very touchy, you'd be better off cutting the trace (at its necked point) which bridges the Adj option solder blob link (you can still blob this link if you need to restore the Adj option) and solder blob the required standard voltage option link. Cutting the Adj option bridging link so you can choose a fixed voltage setting is a safer option - no risk of the trimpot falling apart or going open circuit to over-volt whatever 3.3 or 5 volt rail you're powering with just one volt short of whatever the input supply voltage happens to be (12 to 24 volts perhaps?). Testing the fixed 5v option gave me a tad less than 5 volt (4.95 something volts). Ideally, I wanted a voltage between 5.2 and 5.3 volts so tried blobbing both the 9 and 12 volt option bridges instead which gave me 5.31 volts - right on the money as far as I was concerned. :-) These "3A" versions run a lot cooler compared to the "1.3A" version when testing with a one amp load so should be more robust than their 'weaker cousins' whose overheating/overloading protection seems somewhat lacking since I manage to make a 1.3A one start emitting its magic smoke due to a 5v CMOS RRO dual opamp shorting out the 5v supply rail in a Mark II version of a DIY GPSDO I had been testing (most likely a design error on my part, now since remedied). The specs mention 20mV of ripple noise which will be the RMS value. The peak to peak value will be approximately three times this value, circa 60mV p2p which is quite good and easily reduced to less than 10mV p2p with additional filtering if needed. JBG

Very affordable. Good range of voltages. Small and well designed. But work with low efficiency. I've tested with a 24v lamp. 28V input, 20V output, 200mA. Ripple is 0.26Vpp. 8V drop, 1.6W lost as heat.

Very affordable. Good range of voltages. Small and well designed. But work with low efficiency. I've tested with a 24v lamp. 28V input, 20V output, 200mA. Ripple is 0.26Vpp. 8V drop, 1.6W lost as heat.

Very affordable. Good range of voltages. Small and well designed. But work with low efficiency. I've tested with a 24v lamp. 28V input, 20V output, 200mA. Ripple is 0.26Vpp. 8V drop, 1.6W lost as heat.

All ok

All ok

All ok

It needs cooling or heatsink over 2A

It needs cooling or heatsink over 2A

It needs cooling or heatsink over 2A

ok doručeno

ok doručeno

ok doručeno

manque schema de montage

manque schema de montage

manque schema de montage

This module is tiny as..... it's maybe 1cm wide x 1.5cm long. Great for USB type projects in cars etc. shrink wrap the board and wires and forget about it under the dash. Get rid of the cigarette lighter connection and free up the 12v socket.

This module is tiny as..... it's maybe 1cm wide x 1.5cm long. Great for USB type projects in cars etc. shrink wrap the board and wires and forget about it under the dash. Get rid of the cigarette lighter connection and free up the 12v socket.

This module is tiny as..... it's maybe 1cm wide x 1.5cm long. Great for USB type projects in cars etc. shrink wrap the board and wires and forget about it under the dash. Get rid of the cigarette lighter connection and free up the 12v socket.

Smaller than I thought. However, running an efficiency test with uncalibrated equipment, going from 12 V to 5 V gave me an efficiency of 75% at 13mA and over 90% above 100mA. It ran cool at 1.1A out.

Smaller than I thought. However, running an efficiency test with uncalibrated equipment, going from 12 V to 5 V gave me an efficiency of 75% at 13mA and over 90% above 100mA. It ran cool at 1.1A out.

Smaller than I thought. However, running an efficiency test with uncalibrated equipment, going from 12 V to 5 V gave me an efficiency of 75% at 13mA and over 90% above 100mA. It ran cool at 1.1A out.

Awesome!

Awesome!

Awesome!

Perfect for my needs! Fast shipping.. Might order more..

Perfect for my needs! Fast shipping.. Might order more..

Perfect for my needs! Fast shipping.. Might order more..