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Recent content by QuantumCheese

  1. QuantumCheese

    c programming for LED

    Way to go resurrecting that zombie thread!!
  2. QuantumCheese

    Small cheap short Wave/Mp3 player

    I know, it crazy and depressing all at the same time. Almost any electronics project i can think of can be simply achieved with a piece of cheap Chinese tat, usually off ebay. It takes the fun out of electronics, as you don't need to know anything these days, just which module to buy! (I...
  3. QuantumCheese

    Small cheap short Wave/Mp3 player

    Wow, that's a crazy price! I only need to play one short file though. that says it can 'auto play' on start-up so it could work i guess & at that price you have to ask, why bother do it yourself..... I'll take another look on ebay, i've been thinking too low level it seems
  4. QuantumCheese

    Small cheap short Wave/Mp3 player

    Hi all, What i'm after here is something a bit like one of those naff Xmas/B'day cards with a scratchy (but hilarious) audio playback when opened. I would prefer slightly better quality but nothing audiophile! lets say 3 sec audio, single channel, 22khz, battery powered, finer points TBA...
  5. QuantumCheese

    laser ablation of PCB resist

    Curious..... Surely it's going to take a while to etch with such a narrow laser, but i'm intrigued to know how it goes. I'm wondering how this process will compare with routing the copper directly? as that requires almost all the same kit i would have thought, X -Y table etc, just swap drill...
  6. QuantumCheese

    Home made PCB's

    I had wondered about modifying a laminator, at the present I've stolen a roller from the other-half's art things & use a combo of Iron + Rollering, which is bit of faff but seems to get reasonable results. I've attached a photo of one of the earliest boards i did using the blue transfer...
  7. QuantumCheese

    Home made PCB's

    that looks pretty good bob! I only very recently discovered the 'just print it onto paper & then Iron it to transfer' method (not tried it myself though).... from the descriptions i've read, it does take a bit of cleaning to get the paper off. and i have to say the tracks do look a bit wibbly...
  8. QuantumCheese

    Home made PCB's

    He he, that's kind of why i started this thread! I was hoping someone had had better luck than me with this method. I've never had copper de-lamination how hot was the iron :eek: I can't say i have had 100% success, but it close enough to make it a goer. I'll post some more pics of boards...
  9. QuantumCheese

    Home made PCB's

    Mmm, never done it that way.... I have a bottle of "600-019, Processing Chemical for Photoresist Stripping" (that's an RS part no. btw) .....and i haven't even got on to tinning yet, that's definitely in the 'nasty chemical' bracket I use a Flux pen, also from RS i think. I find it a lot...
  10. QuantumCheese

    Home made PCB's

    I would call Developing a chemical process, and i would also call removing of the photo-resist after etching a chemical process, but that's just me i guess. The whole point to this is 'home made'. not double sided with through plating. not covered with high freq tracking and uProc buses. So...
  11. QuantumCheese

    Home made PCB's

    That's exactly what it is! I didn't mention the iron, though thinking about it i should have as there are 'press & peel' stickers too, forgot about them. Apologies. "Iron-on toner-transfer method" would probably be it's best description.
  12. QuantumCheese

    Home made PCB's

    Hi all, I've been at this for a while now and with reasonable results (single sided only obviously). I would like to try DS but among the many pitfalls I have encountered along the way, i discovered that my HP laser output isn't to scale - it changes from the top of a sheet to the bottom...
  13. QuantumCheese

    Laser printer missing colour issue

    Hi all, I have this colour laser printer i'm trying to save from land-fill here. Its a Canon LBP-5100 (the internet would suggest it has the same engine as an HP laserjet 6000 i think) OK, the problem - It prints great using Black, Cyan, & Yellow, but Magenta is almost completely non...
  14. QuantumCheese

    Philips 32PF5521D/10 Stuck in Standby Sortof

    Well, i give up. I disconnected the PSU entirely and powered it up using bench supplies. with the dvb board unplugged i got a led blink error that could be interpreted as 17 which equates to i2c error comms dvb board - which makes sense, it was unplugged with the dvb board connected &...
  15. QuantumCheese

    Philips 32PF5521D/10 Stuck in Standby Sortof

    Going by the notes i made, I've traced my way around the IC called 'Hercules' on the SSB, checking the various small supplies on that board and they all appear correct. I don't think i scope'd them I probably just used my DVM. Considering that their are essentially 3 boards in this set...
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