Search found 4 matches

by Adam Pyka
Tue 26 Apr 2016 13:19
Forum: Cave Radio & Electronics
Topic: Pic Controlled HeyPhone
Replies: 6
Views: 9000

Re: Pic Controlled HeyPhone

Some more info - because I'm building one more set I get some new experiences. The main issue is that the part list is really out-of-dated and some parts have wrong values or does simply not exist (eg. U18/U19). 1. TOKO filters are only available from JabDog company. 2. The main transformer can be f...
by Adam Pyka
Wed 23 Mar 2016 18:48
Forum: Cave Radio & Electronics
Topic: Pic Controlled HeyPhone
Replies: 6
Views: 9000

Re: Pic Controlled Hey Phone

Any idea how many of these PIC controlled HeyPhones have been built? At least two in Netherland and at last two by me here in Poland ;) Rob, maybe there is a time to re-design the HeyPhone and use a uC for generating some signals? That will cause simplification of the construction and a reduction i...
by Adam Pyka
Wed 23 Mar 2016 10:22
Forum: Cave Radio & Electronics
Topic: Pic Controlled HeyPhone
Replies: 6
Views: 9000

Re: Pic Controlled Hey Phone

That's the valid URL: http://www.vollok.nl/projects/pic_controlled_caveradio/ with all the data. I wrote to Danny an email with the answers to questions he had but some issues may be also valid for others: R46 should be 47k. R107/108/109 should be 180ohm but it depends on the LED color. R104/105/106...
by Adam Pyka
Mon 02 Feb 2015 16:53
Forum: Cave Radio & Electronics
Topic: Heyphone
Replies: 8
Views: 15429

Re: Heyphone (parts list)

Hello all! I believe the Toko 360 µH inductors are no longer made, but John Hey uses small fixed inductors of 330 micro henries (they look like 1/4 W resistors and are made by many companies). He adjusts the value of the parallel capacitor (originally 10 nF) so as to achieve resonance. I'm trying to...