charge pumps 1 more time

[zjokka]

note the max 1044 can't handle more than ten volts at its supply pin, or be able to provide more than 10mA.  If either happens it'll probably die. 

Very right, mine died right away in a stinking way after I pulled it over 9V with a variable psu. This is particularly sad as I ordered mine from futurlec at $2.40 (tiny version Package Type:   SOIC8) so had a lot of fun soldering legs to these suckers.

the larger package is $2.95

zj

[Paul Perry (Frostwave)]

You might also consider simply useing a Voltage doubler/Tripler...It should double the available Voltage but half the available current...You can make a Voltage doubler out of a few Diodes and Capacitors

In case anyone is confused, a simple voltage doubler or tripler only works on AC, whereas the charge pump works on DC.

[Laus]

yeah...but i'm still in doubt of just buying an 18V wallwart (they are VERY hard to find here in the Netherlandsm its all 9-12V) or building it myself. A 125 euro DC-brick is way out of what I find reasonable for such a device.

I have the LTC 1044 chip which should supply about 20mA. Still have to measure but have no time. Don't know where to hold the multimeter to measure the flipster. But alone he LEDS should take more than 20mA. So it's no option anyway now.

[Paul Perry (Frostwave)]

Laus, one thing you CAN get in NL - or anywhere else - are the 16 V AC transformers used on domestic burglar alarms.
These rectify to about 20V, so that might be one solution.
Then there are plug packs from old laptops and scanners. A voltage that often shows up is 24v DC, you can regulate that down.

[Laus]

now the laptop thing is a good idea! If they are 24volts...with a divider...or such a transistor I should be able to do that. Let's look for that!

[TheBigMan]

yeah...but i'm still in doubt of just buying an 18V wallwart (they are VERY hard to find here in the Netherlandsm its all 9-12V) or building it myself. A 125 euro DC-brick is way out of what I find reasonable for such a device.

I have the LTC 1044 chip which should supply about 20mA. Still have to measure but have no time. Don't know where to hold the multimeter to measure the flipster. But alone he LEDS should take more than 20mA. So it's no option anyway now.

Maplin over here in the UK sell 18V adapters.  Also try your local Jim Dunlop dealer - a good few of their pedals run on 18V.  Another option is eBay.  My 18V PSU comes from an old US Robotics external modem!