How to power fluffy2?

[Auberon]

I've built it but know I'm wondering how am I supposed to provide the 18V 100mA. All ac-dc adapters I've ever seen go up to 12V and provide 300-500mA. Am I supposed to buy a special adapter? Can I use two adapters (9+9 = 18)? Can the programmer handle more milliamps? Please help. Thanks.

[Emanuel]

The Fluffy programmer works OK with Vcc as low as 15 V. If you take a multimeter, you will see that the 12 V adapters give 12 V for a load of 500 mA, but for a load of 100 mA they may well give the 18 V you want.

[Auberon]

Fair enough but how do I lower the amps? The variing part is the voltage. Are there variable amp adapters? Is it TOO obvious that I don't know shit about all this? Sorry to irritate you.

[Emanuel]

The Fluffy programmer has a maximum current consumption of 100 mA. Even if the adapter can provide more current (e.g. 500 mA), the programmer will not consume more than 100 mA. And this is the good news, because at this lower current consumption, most ac/dc adaptors give a higher voltage than the one selected (e.g. even 20V @ 100 mA). So you don't have to worry. Power your Fluffy programmer with any ac/dc adaptor configured for 12V dc and it will work fine.

[Auberon]

Done it! Bought a 12V 1000mA adapter and it worked beautifully. Programed my first chip error free. Now I have to read through the posts to find what is the most recomended configuration for the magic pcb. Thanks a lot!

[Deathwish]

when a circuit needs for example 18v 100mA it means that it needs to drawn 100mA with 18v.

Now if you give it 18v @ 3Amps (not milli AMPS)

It still works because the important part is that you supply the CORRECT voltage and MORE Current (Amps or milli Amps) than it needs!!

if you supply 18v with 100uA (micro Amps) it wouldnt work because micro amps are MUCH SMALLER then mA.

to make things short, a circuit takes as much as HE want AMPS and as much as YOU give him voltage.