22uf 16v will be fine. 1uf input capacitor can be 63-100V, poly, Wima etc.
Yes, DI booster will work on +18 as well, with less output swing. Not sure every 24V relay will work on 18v btw...
Possible to check how many volts do you have on rectifier capacitors on power supply,
if + is more than +29V, it is possible to add +24V separate regulator, LM317 and some parts will do the job.
The board dimensions are 81x54mm.
Yes, DI booster will work on +18 as well, with less output swing. Not sure every 24V relay will work on 18v btw...
Possible to check how many volts do you have on rectifier capacitors on power supply,
if + is more than +29V, it is possible to add +24V separate regulator, LM317 and some parts will do the job.
The board dimensions are 81x54mm.