In April I bought an AVO 8 as a b/day present to myself.
It had no batteries and I wasn't prepared to pay more for a 15V one than the meter had cost (excluding the postage). It wasn't a huge issue as resistance is something that I find a digital meter better for and on the odd occasions I did want to use it just connected it to my bench supply.
I recently discovered that lithium button cells are now far cheaper than I'd realisied; I hadn't gone down this route before as I remember them being sold as computer CMOS batteries and costing about ten quid each. I managed to get 5 CR1632s for £1.25.
These arrived this morning and work very nicely.
The cells are held together with heat-shrink and the terminals are bits of old PP3 casing. I'd got the latter after attempting to rearrange the cells out of two but couldn't squeeze them in. The bits of wood are from an old door and the thin bits are plys from some plywood with a tendency to de-laminate which, for once, was very handy.
There's plenty of spare juice as the zero-ing pot is nearly at its maximum.
- Joe
It had no batteries and I wasn't prepared to pay more for a 15V one than the meter had cost (excluding the postage). It wasn't a huge issue as resistance is something that I find a digital meter better for and on the odd occasions I did want to use it just connected it to my bench supply.
I recently discovered that lithium button cells are now far cheaper than I'd realisied; I hadn't gone down this route before as I remember them being sold as computer CMOS batteries and costing about ten quid each. I managed to get 5 CR1632s for £1.25.
These arrived this morning and work very nicely.
The cells are held together with heat-shrink and the terminals are bits of old PP3 casing. I'd got the latter after attempting to rearrange the cells out of two but couldn't squeeze them in. The bits of wood are from an old door and the thin bits are plys from some plywood with a tendency to de-laminate which, for once, was very handy.
There's plenty of spare juice as the zero-ing pot is nearly at its maximum.
- Joe
