Added various utility circuits to the “Other” category of vero layouts.
CMOS switching circuit that can be used to route an input to the input of either of three different circuits:
+9v DC regulated power supply unit. Can be updated for +18v by changing to capacitors rated 25v+ and a +18v regulator:
A standard charge pump circuit that can give you -9v. Use either alone (for those positive ground effects) or in conjunction with the +9v for bi-polar power:
A voltage doubler using either the 7660S or the MAX1044 IC. This will give you almost +18v from a +9v supply:
Same as the above voltage doubler (+9v to ~+18v), but using a higher current IC (the LT1054):
Outputs a 1000Hz sine wave with a user variable amplitude. Use for injecting a test signal when debugging:
JFET testing circuit. I used this to match transistors for the Phase 90: