This circuit is from an old Mullard (Philips) manual with applications using the 555. Choosing appropriately the resistors and the timing capacitors, the ranges obtained can exceed days.
The circuit shown consists of a bilateral constant current source with an operational one that...
This circuit for discharging NiCad batteries limits the current to a value that can be adjusted in the...
This AC voltmeter, with 10 V full scale, has a sensitivity of 20 k ohms per volt. The supply must...