Silicon Chip TENS project.

firstname snipped-for-privacy@ieee.org

Cheers Terry

PS I think I'll get my dad to send me a TENS kit too, I've been meaning to make one for a while now, and it doesnt get easier or cheaper than this!

I just dont speed, its easier that way. Besides, my van is basically a container with wheels, so the fuel efficiency goes up significantly, and instead of peering about looking for cops, I can think about circuits instead ;)

But I would like a copy of that circuit please!

Cheers Terry

I tried that before but it bounced. I've just tried again. Mozilla Thunderbird underlines all links so I couldn't see the underscore, which didn't help.

You'll really 'enjoy' the construction. I replaced the 2 x 0.47uF

63V MKT filter caps with a 1uF 160V electrolytic on its side, and the last 0.47uF 63V with a 0.47uF 100V MKT on its side. I hope your father can find a kit. I got the last one in my local DSE store.

Bob

I've had the exact same problem, with other peoples email addy's!

Fingers crossed.

I have to buy another zapping bug swatter. My one was a bit feeble (but only $8) - zapped flies would re-awake after 10-20 minutes, and fly off, so I:

- replaced quadrupler diodes with BYV56's

- used 330nF 1kV film cap rather than 47nF 1.6kV

- added speedup cap to base drive resistor

and got the output voltage up from 1700V to 2500V, so 15x more energy. BANG, the flies dont recover from that.

Then last week the handle snapped in half as I tried a daring backhand in-the-air swat. Bjorn Borg, eat your heart out!

Cheers Terry

Unfortunately DSE's bean counters seem to have just woken up to the fact that selling kits below the cost of producing them doesn't make economic sense. The price of the K3705 TENS kit as shown on the DSE website has just jumped back up to $49.98. :(

Bob

Not only that but I was in Tocumwal and their store is even more expensive. Not only this but their management dont realise that we dont only go to buy a kit but other stuff as well, and free advertising on this media source will give the negative press. Er NEGATIVE PRESS. DID THEY hear that? I wonder. But JAYCAR IS OK DS stands for D*P SH*&TS. Why are they so damn idiotic. Dick Smith worked in the past because of the select market, not the hyper super market stuff they're now selling. Thats a completely other market requiring a different sales technique. PS DS Why wont you hire smarter older electronics buffs. Instead of the electronic misfits you find in your stores these days? I can run circles around them.

They hire anybody that will work for the crap wages they offer! Why do you think Jaycar has been advertising for staff for YEARS, when there is no shortage of real technicians looking for work?

MrT.

Thats what I mean. Electronically intelligent people. It may even rub of and increase sales etc...

circles

there

But would require them to pay more than minimum wage, which they are obviously not prepared to do, or they would have done it already.

MrT.

Well yes but they have got their head in the sand.

Unfortunately that may not be the case. These shops are becoming more self serve. An automated self serve check-out may be next :-)

They probably have a better idea of how to make *money* than all the old shops with knowledgeable staff, that have since gone out of business. Shame, but that's the way it works I'm afraid.

Personally I have never understood the Harvey Norman business model, But Gerry Harvey's wealth speaks for itself. How many electronics engineers wish they could spend their time flying a helicopter like Dick Smith. Just what HAS he done in the last 20 years? (stuffing up aviation safety excepted of course, and repackaging biscuits/peanut butter :-)

Welcome to the world of modern marketing.

MrT.

In the UK, the Lloyds Chemist chain is selling a Solpadeine branded TENS for £9.99p - but replacement gel pads are about £5.

Oh dear - I haven't priced the replacement pads yet. They're probably a similar price in the Antipodes. :-( Thanks for the info.

Bob